Crash with "AssertionError: Should never get here in normal mode"

🐛 Python 3.6.5, mypy 0.610

Reproducible on https://github.com/pypa/pip master. Running tox -e mypy on that repo a second time or later, results in an error the second time.

mypy configuration:

[mypy]
follow_imports = silent
ignore_missing_imports = True
strict_optional = False

[mypy-pip/_vendor/*]
follow_imports = skip
ignore_errors = True

mypy output/traceback:

mypy runtests: commands[0] | mypy src/pip
Traceback (most recent call last):
  File "/Users/pradyunsg/Projects/pip/.tox/mypy/bin/mypy", line 11, in <module>
    sys.exit(console_entry())
  File "/Users/pradyunsg/Projects/pip/.tox/mypy/lib/python3.6/site-packages/mypy/__main__.py", line 7, in console_entry
    main(None)
  File "/Users/pradyunsg/Projects/pip/.tox/mypy/lib/python3.6/site-packages/mypy/main.py", line 91, in main
    res = type_check_only(sources, bin_dir, options, flush_errors, fscache)  # noqa
  File "/Users/pradyunsg/Projects/pip/.tox/mypy/lib/python3.6/site-packages/mypy/main.py", line 148, in type_check_only
    fscache=fscache)
  File "/Users/pradyunsg/Projects/pip/.tox/mypy/lib/python3.6/site-packages/mypy/build.py", line 185, in build
    flush_errors, fscache)
  File "/Users/pradyunsg/Projects/pip/.tox/mypy/lib/python3.6/site-packages/mypy/build.py", line 285, in _build
    graph = dispatch(sources, manager)
  File "/Users/pradyunsg/Projects/pip/.tox/mypy/lib/python3.6/site-packages/mypy/build.py", line 2398, in dispatch
    process_graph(graph, manager)
  File "/Users/pradyunsg/Projects/pip/.tox/mypy/lib/python3.6/site-packages/mypy/build.py", line 2684, in process_graph
    process_fresh_modules(graph, prev_scc, manager)
  File "/Users/pradyunsg/Projects/pip/.tox/mypy/lib/python3.6/site-packages/mypy/build.py", line 2770, in process_fresh_modules
    graph[id].fix_cross_refs()
  File "/Users/pradyunsg/Projects/pip/.tox/mypy/lib/python3.6/site-packages/mypy/build.py", line 1853, in fix_cross_refs
    self.options.use_fine_grained_cache)
  File "/Users/pradyunsg/Projects/pip/.tox/mypy/lib/python3.6/site-packages/mypy/fixup.py", line 25, in fixup_module
    node_fixer.visit_symbol_table(tree.names)
  File "/Users/pradyunsg/Projects/pip/.tox/mypy/lib/python3.6/site-packages/mypy/fixup.py", line 95, in visit_symbol_table
    self.visit_type_info(value.node)
  File "/Users/pradyunsg/Projects/pip/.tox/mypy/lib/python3.6/site-packages/mypy/fixup.py", line 48, in visit_type_info
    base.accept(self.type_fixer)
  File "/Users/pradyunsg/Projects/pip/.tox/mypy/lib/python3.6/site-packages/mypy/types.py", line 512, in accept
    return visitor.visit_instance(self)
  File "/Users/pradyunsg/Projects/pip/.tox/mypy/lib/python3.6/site-packages/mypy/fixup.py", line 156, in visit_instance
    inst.type = lookup_qualified_typeinfo(self.modules, type_ref, self.quick_and_dirty)
  File "/Users/pradyunsg/Projects/pip/.tox/mypy/lib/python3.6/site-packages/mypy/fixup.py", line 246, in lookup_qualified_typeinfo
    assert quick_and_dirty, "Should never get here in normal mode"
AssertionError: Should never get here in normal mode
ERROR: InvocationError for command '/Users/pradyunsg/Projects/pip/.tox/mypy/bin/mypy src/pip' (exited with code 1)

Following a similar, older report (#3852), attached is a zip of the .mypy_cache: mypy_cache.zip

Confirmed on mypy master.

Reproduced on master as:

$ # in a clean venv, activated
$ python3 -m pip install -U git+git://github.com/python/mypy.git 
[...]
$ git clone https://github.com/pypa/pip.git --depth=1
[...]
$ cd pip
$ git fetch origin 13a749de24448d553b73abbb119d6a9e42531089
$ git checkout 13a749de24448d553b73abbb119d6a9e42531089
$ mypy src
[...]
$ mypy src
Traceback (most recent call last):
  File "/tmp/mypy-venv/bin/mypy", line 11, in <module>
    sys.exit(console_entry())
  File "/tmp/mypy-venv/lib/python3.6/site-packages/mypy/__main__.py", line 7, in console_entry
    main(None)
  File "/tmp/mypy-venv/lib/python3.6/site-packages/mypy/main.py", line 91, in main
    res = type_check_only(sources, bin_dir, options, flush_errors, fscache)  # noqa
  File "/tmp/mypy-venv/lib/python3.6/site-packages/mypy/main.py", line 148, in type_check_only
    fscache=fscache)
  File "/tmp/mypy-venv/lib/python3.6/site-packages/mypy/build.py", line 181, in build
    flush_errors, fscache)
  File "/tmp/mypy-venv/lib/python3.6/site-packages/mypy/build.py", line 286, in _build
    graph = dispatch(sources, manager)
  File "/tmp/mypy-venv/lib/python3.6/site-packages/mypy/build.py", line 2440, in dispatch
    process_graph(graph, manager)
  File "/tmp/mypy-venv/lib/python3.6/site-packages/mypy/build.py", line 2726, in process_graph
    process_fresh_modules(graph, prev_scc, manager)
  File "/tmp/mypy-venv/lib/python3.6/site-packages/mypy/build.py", line 2812, in process_fresh_modules
    graph[id].fix_cross_refs()
  File "/tmp/mypy-venv/lib/python3.6/site-packages/mypy/build.py", line 1895, in fix_cross_refs
    self.options.use_fine_grained_cache)
  File "/tmp/mypy-venv/lib/python3.6/site-packages/mypy/fixup.py", line 25, in fixup_module
    node_fixer.visit_symbol_table(tree.names)
  File "/tmp/mypy-venv/lib/python3.6/site-packages/mypy/fixup.py", line 95, in visit_symbol_table
    self.visit_type_info(value.node)
  File "/tmp/mypy-venv/lib/python3.6/site-packages/mypy/fixup.py", line 48, in visit_type_info
    base.accept(self.type_fixer)
  File "/tmp/mypy-venv/lib/python3.6/site-packages/mypy/types.py", line 513, in accept
    return visitor.visit_instance(self)
  File "/tmp/mypy-venv/lib/python3.6/site-packages/mypy/fixup.py", line 156, in visit_instance
    inst.type = lookup_qualified_typeinfo(self.modules, type_ref, self.quick_and_dirty)
  File "/tmp/mypy-venv/lib/python3.6/site-packages/mypy/fixup.py", line 246, in lookup_qualified_typeinfo
    assert quick_and_dirty, "Should never get here in normal mode"
AssertionError: Should never get here in normal mode

Removing .mypy_cache after the first run, prevents this from occurring.

I really hoped we will not see this ever again :-( Just to clarify, is this a regression in 0.610 (i.e. does it work with mypy 0.600)?

Also, could you please try to play with mypy config to see what exactly causes a breakage? Ideally it would be great to have a minimalistic repro, but I understand this may be hard to find.

No crash with mypy 0.600.

Also, it no longer occurs on pip's master; I added a missing stub for a vendored library, which seems to have fixed this. It does still occur on pypa/pip@13a749d. Updated the reproduction case above to checkout to that.

Is there any way to know which file mypy is processing when it crashes? I have a gut feeling it's going to be appdirs.py in src/pip/_vendor/. :P

Minimal reproduction mypy config, with the same source tree.

[mypy-pip/_vendor/*]
ignore_errors = True

Is there any way to know which file mypy is processing when it crashes?

You can run mypy with -v (There is also -vv but it is extremely verbose).

mypy 0.600 also crashes with the minimal configuration but not with the configuration in OP.
Both 0.600 and 0.610 do not crash with defaults -- i.e. an empty configuration file.

The crash still occurs on mypy 0.600 and 0.610 with the source tree reduced to (the minimal configuration):

.
├── setup.cfg
└── src
    └── pip
        ├── __init__.py
        ├── _internal
        │   ├── __init__.py
        │   └── configuration.py
        └── _vendor
            ├── __init__.py
            └── urllib3
                ├── __init__.py
                └── util
                    ├── __init__.py
                    └── url.py

6 directories, 9 files

All the __init__.py files are empty. Moving url.py to _vendor and deleting the urllib3 folder (which now only has empty __init__.py) files, still crashes. Moving it out of _vendor resolves the crash. :/

Here's the smallest reproduction case I can come up with (crashes both 0.600 and 0.610):

tree .

.
├── setup.cfg
└── src
    ├── ignored
    │   ├── __init__.py
    │   └── two.py
    └── one.py

2 directories, 4 files

__init__.py is an empty file.

one.py

import logging

def func(value):
    # type: (Any) -> None
    pass

two.py

from collections import namedtuple


class MyClass(namedtuple('MyClass', undefined_variable)):
    pass

setup.cfg

[mypy-ignored/*]
ignore_errors = True

Things that prevent the crash:

Adding from typing import Any to one.py
Removing import logging from one.py
Removing # type comment from one.py
Changing undefined_variable in two.py to [] or ['a'] (but not when it's [1])

Is it just me or does this look very weird? ._.

Output of mypy src, with no .mypy_cache:

src/one.py:4: error: Name 'Any' is not defined

Click to see output of mypy src -vv, run immediately after:

LOG:  Mypy version 0.610
TRACE: Looking for ignored at .mypy_cache/3.6/ignored/__init__.meta.json
TRACE: Meta ignored {"child_modules": ["ignored.two"], "data_mtime": 1528718789, "dep_lines": [1], "dep_prios": [5], "dependencies": ["builtins"], "deps_mtime": null, "hash": "d41d8cd98f00b204e9800998ecf8427e", "id": "ignored", "ignore_all": false, "interface_hash": "7c459e47627738d7f603c7e1e39bf244", "mtime": 1528717643, "options": {"always_false": [], "always_true": [], "check_untyped_defs": false, "disallow_any_decorated": false, "disallow_any_explicit": false, "disallow_any_expr": false, "disallow_any_generics": false, "disallow_any_unimported": false, "disallow_subclassing_any":false, "disallow_untyped_calls": false, "disallow_untyped_decorators": false, "disallow_untyped_defs": false, "follow_imports": "normal", "follow_imports_for_stubs": false, "ignore_errors": true, "ignore_missing_imports": false, "local_partial_types": false, "no_implicit_optional": false, "platform": "darwin", "quick_and_dirty": false, "show_none_errors": true, "strict_boolean": false, "strict_optional": true, "strict_optional_whitelist": null, "warn_no_return": true, "warn_return_any": false, "warn_unused_ignores": false}, "path": "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/pip/src/ignored/__init__.py", "size": 0, "suppressed": [], "version_id": "0.610"}
LOG:  Metadata fresh for ignored: file /Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/pip/src/ignored/__init__.py
TRACE: Looking for ignored.two at .mypy_cache/3.6/ignored/two.meta.json
TRACE: Meta ignored.two {"child_modules": [], "data_mtime": 1528718789, "dep_lines": [1, 1], "dep_prios": [5, 5], "dependencies": ["collections", "builtins"], "deps_mtime": null, "hash": "6877b9cb41eae9c4a02f44d63fa7df9c", "id": "ignored.two", "ignore_all": false, "interface_hash": "4243b6502fd55df1582c7fb7bc51d172", "mtime": 1528718254, "options": {"always_false": [], "always_true": [], "check_untyped_defs": false, "disallow_any_decorated": false, "disallow_any_explicit": false, "disallow_any_expr": false, "disallow_any_generics": false, "disallow_any_unimported": false, "disallow_subclassing_any": false, "disallow_untyped_calls": false, "disallow_untyped_decorators": false, "disallow_untyped_defs": false, "follow_imports": "normal", "follow_imports_for_stubs": false, "ignore_errors": true, "ignore_missing_imports": false, "local_partial_types": false, "no_implicit_optional": false, "platform": "darwin", "quick_and_dirty": false, "show_none_errors": true, "strict_boolean": false, "strict_optional": true, "strict_optional_whitelist": null, "warn_no_return": true, "warn_return_any": false, "warn_unused_ignores": false}, "path": "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/pip/src/ignored/two.py", "size": 89, "suppressed": [], "version_id": "0.610"}
LOG:  Metadata fresh for ignored.two: file /Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/pip/src/ignored/two.py
TRACE: Looking for one at .mypy_cache/3.6/one.meta.json
LOG:  Could not load cache for one: .mypy_cache/3.6/one.meta.json
LOG:  Metadata not found for one
LOG:  Parsing src/one.py (one)
TRACE: Looking for builtins at .mypy_cache/3.6/builtins.meta.json
TRACE: Meta builtins {"child_modules": [], "data_mtime": 1528718789, "dep_lines": [3, 10, 11, 12], "dep_prios": [5, 5, 5, 10], "dependencies": ["typing", "abc", "types", "sys"], "deps_mtime": null, "hash": "f02f7d2923d1d3176e5c6e9ca0e1bb50", "id": "builtins", "ignore_all": false, "interface_hash": "b7db4ebf9af84ab0add2988864445467", "mtime": 1528718778, "options": {"always_false": [], "always_true": [], "check_untyped_defs": false, "disallow_any_decorated": false, "disallow_any_explicit": false, "disallow_any_expr": false, "disallow_any_generics": false, "disallow_any_unimported": false, "disallow_subclassing_any": false, "disallow_untyped_calls": false, "disallow_untyped_decorators": false, "disallow_untyped_defs": false, "follow_imports": "normal", "follow_imports_for_stubs": false, "ignore_errors": false, "ignore_missing_imports": false, "local_partial_types": false, "no_implicit_optional": false, "platform": "darwin", "quick_and_dirty": false, "show_none_errors": true, "strict_boolean": false, "strict_optional": true, "strict_optional_whitelist": null, "warn_no_return": true, "warn_return_any": false, "warn_unused_ignores": false}, "path": "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/3/builtins.pyi", "size": 46034, "suppressed": [], "version_id": "0.610"}
LOG:  Metadata fresh for builtins: file /Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/3/builtins.pyi
TRACE: Looking for collections at .mypy_cache/3.6/collections/__init__.meta.json
TRACE: Meta collections {"child_modules": ["collections.abc"], "data_mtime": 1528718788, "dep_lines": [6, 7, 13, 1, 1], "dep_prios": [10, 5, 10, 5, 30], "dependencies": ["sys", "typing", "collections.abc", "builtins", "abc"], "deps_mtime": null, "hash": "6e8c017af4fb0134016c50d5e0abf59f", "id": "collections", "ignore_all": false, "interface_hash": "21ddf23b372701468d5056b4bec37eba", "mtime": 1528718778, "options": {"always_false": [], "always_true": [], "check_untyped_defs": false, "disallow_any_decorated": false, "disallow_any_explicit": false, "disallow_any_expr": false, "disallow_any_generics": false, "disallow_any_unimported": false, "disallow_subclassing_any": false, "disallow_untyped_calls": false, "disallow_untyped_decorators": false, "disallow_untyped_defs": false, "follow_imports": "normal", "follow_imports_for_stubs": false, "ignore_errors": false, "ignore_missing_imports": false, "local_partial_types": false, "no_implicit_optional": false, "platform": "darwin", "quick_and_dirty": false, "show_none_errors": true, "strict_boolean": false, "strict_optional": true, "strict_optional_whitelist": null, "warn_no_return": true, "warn_return_any": false, "warn_unused_ignores": false}, "path": "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/3/collections/__init__.pyi", "size": 15065, "suppressed": [], "version_id": "0.610"}
LOG:  Metadata fresh for collections: file /Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/3/collections/__init__.pyi
TRACE: Looking for logging at .mypy_cache/3.6/logging/__init__.meta.json
TRACE: Meta logging {"child_modules": [], "data_mtime": 1528718789, "dep_lines": [3, 7, 8, 9, 10, 11, 1, 1], "dep_prios": [5, 5, 5, 5, 10, 10, 5, 30], "dependencies": ["typing", "string", "time", "types", "sys", "threading", "builtins", "abc"], "deps_mtime": null, "hash": "eb7f0787091a8dfef1551159ceb92604", "id": "logging", "ignore_all": false, "interface_hash": "d00277b5b2db8afcf099f93c96335302", "mtime": 1528718778, "options": {"always_false": [], "always_true": [], "check_untyped_defs": false, "disallow_any_decorated": false, "disallow_any_explicit": false, "disallow_any_expr": false, "disallow_any_generics": false, "disallow_any_unimported": false, "disallow_subclassing_any": false, "disallow_untyped_calls": false, "disallow_untyped_decorators": false, "disallow_untyped_defs": false, "follow_imports": "normal", "follow_imports_for_stubs": false, "ignore_errors": false, "ignore_missing_imports": false, "local_partial_types": false, "no_implicit_optional": false, "platform": "darwin", "quick_and_dirty": false, "show_none_errors": true, "strict_boolean": false, "strict_optional": true, "strict_optional_whitelist": null, "warn_no_return": true, "warn_return_any":false, "warn_unused_ignores": false}, "path": "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/2and3/logging/__init__.pyi", "size": 18609, "suppressed": [], "version_id": "0.610"}
LOG:  Metadata fresh for logging: file /Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/2and3/logging/__init__.pyi
TRACE: Looking for typing at .mypy_cache/3.6/typing.meta.json
TRACE: Meta typing {"child_modules": [], "data_mtime": 1528718788, "dep_lines": [3, 4, 5, 6, 1], "dep_prios": [10, 5, 5, 10, 5], "dependencies": ["sys", "abc", "types", "collections", "builtins"],"deps_mtime": null, "hash": "b25d91dc542923260f50d280df060e85", "id": "typing", "ignore_all": false, "interface_hash": "af12f09337aadfd6519a6dd4acd8572c", "mtime": 1528718778, "options": {"always_false": [], "always_true": [], "check_untyped_defs": false, "disallow_any_decorated": false, "disallow_any_explicit": false, "disallow_any_expr": false, "disallow_any_generics": false, "disallow_any_unimported": false, "disallow_subclassing_any": false, "disallow_untyped_calls": false, "disallow_untyped_decorators": false, "disallow_untyped_defs": false, "follow_imports": "normal", "follow_imports_for_stubs": false, "ignore_errors": false, "ignore_missing_imports": false, "local_partial_types": false, "no_implicit_optional": false, "platform": "darwin", "quick_and_dirty": false, "show_none_errors": true, "strict_boolean": false, "strict_optional": true, "strict_optional_whitelist": null, "warn_no_return": true, "warn_return_any": false, "warn_unused_ignores": false}, "path": "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/3/typing.pyi", "size": 18942, "suppressed": [], "version_id": "0.610"}
LOG:  Metadata fresh for typing: file /Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/3/typing.pyi
TRACE: Looking for abc at .mypy_cache/3.6/abc.meta.json
TRACE: Meta abc {"child_modules": [], "data_mtime": 1528718788, "dep_lines": [1, 2, 1], "dep_prios": [5, 10, 5], "dependencies": ["typing", "sys", "builtins"], "deps_mtime": null, "hash": "b0cc9513c1f9ba454241898c7a660486", "id": "abc", "ignore_all": false, "interface_hash": "a66f97e11b354a43a7ddd96b5345321a", "mtime": 1528718778, "options": {"always_false": [], "always_true": [], "check_untyped_defs": false, "disallow_any_decorated": false, "disallow_any_explicit": false, "disallow_any_expr": false, "disallow_any_generics": false, "disallow_any_unimported": false, "disallow_subclassing_any": false, "disallow_untyped_calls": false, "disallow_untyped_decorators": false, "disallow_untyped_defs": false, "follow_imports": "normal", "follow_imports_for_stubs": false, "ignore_errors": false, "ignore_missing_imports": false, "local_partial_types": false, "no_implicit_optional": false, "platform": "darwin", "quick_and_dirty": false, "show_none_errors": true, "strict_boolean": false, "strict_optional": true, "strict_optional_whitelist": null, "warn_no_return": true, "warn_return_any": false, "warn_unused_ignores": false}, "path": "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/3/abc.pyi", "size": 793, "suppressed": [], "version_id": "0.610"}
LOG:  Metadata fresh for abc: file /Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/3/abc.pyi
TRACE: Looking for types at .mypy_cache/3.6/types.meta.json
TRACE: Meta types {"child_modules": [], "data_mtime": 1528718788, "dep_lines": [6, 7, 14, 1, 1], "dep_prios": [10, 5, 5, 5, 30], "dependencies": ["sys", "typing", "_importlib_modulespec", "builtins", "abc"], "deps_mtime": null, "hash": "f41f7744ad8e6c4d4c3c55507da811a4", "id": "types", "ignore_all": false, "interface_hash": "07318e1f49cc8b6149fa523d80222049", "mtime": 1528718778, "options":{"always_false": [], "always_true": [], "check_untyped_defs": false, "disallow_any_decorated": false, "disallow_any_explicit": false, "disallow_any_expr": false, "disallow_any_generics": false, "disallow_any_unimported": false, "disallow_subclassing_any": false, "disallow_untyped_calls": false, "disallow_untyped_decorators": false, "disallow_untyped_defs": false, "follow_imports": "normal","follow_imports_for_stubs": false, "ignore_errors": false, "ignore_missing_imports": false, "local_partial_types": false, "no_implicit_optional": false, "platform": "darwin", "quick_and_dirty": false, "show_none_errors": true, "strict_boolean": false, "strict_optional": true, "strict_optional_whitelist": null, "warn_no_return": true, "warn_return_any": false, "warn_unused_ignores": false}, "path": "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/3/types.pyi", "size": 7689, "suppressed": [], "version_id": "0.610"}
LOG:  Metadata fresh for types: file /Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/3/types.pyi
TRACE: Looking for sys at .mypy_cache/3.6/sys.meta.json
TRACE: Meta sys {"child_modules": [], "data_mtime": 1528718788, "dep_lines": [6, 11, 14, 1, 1, 1, 1], "dep_prios": [5, 5, 5, 5, 30, 30, 30], "dependencies": ["typing", "types", "importlib.abc", "builtins", "_importlib_modulespec", "abc", "importlib"], "deps_mtime": null, "hash": "8db7a3ca4604a6fbd07a6e540c990dcc", "id": "sys", "ignore_all": false, "interface_hash": "dd1e0502e2ac7b1ff60d906e7e84806a", "mtime": 1528718778, "options": {"always_false": [], "always_true": [], "check_untyped_defs": false, "disallow_any_decorated": false, "disallow_any_explicit": false, "disallow_any_expr":false, "disallow_any_generics": false, "disallow_any_unimported": false, "disallow_subclassing_any": false, "disallow_untyped_calls": false, "disallow_untyped_decorators": false, "disallow_untyped_defs": false, "follow_imports": "normal", "follow_imports_for_stubs": false, "ignore_errors": false, "ignore_missing_imports": false, "local_partial_types": false, "no_implicit_optional": false, "platform": "darwin", "quick_and_dirty": false, "show_none_errors": true, "strict_boolean": false, "strict_optional": true, "strict_optional_whitelist": null, "warn_no_return": true, "warn_return_any": false, "warn_unused_ignores": false}, "path": "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/3/sys.pyi", "size": 5258, "suppressed": [], "version_id": "0.610"}
LOG:  Metadata fresh for sys: file /Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/3/sys.pyi
TRACE: Looking for collections.abc at .mypy_cache/3.6/collections/abc.meta.json
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LOG:  Metadata fresh for collections.abc: file /Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/3/collections/abc.pyi
TRACE: Looking for string at .mypy_cache/3.6/string.meta.json
TRACE: Meta string {"child_modules": [], "data_mtime": 1528718789, "dep_lines": [5, 1, 1], "dep_prios": [5, 5, 30], "dependencies": ["typing", "builtins", "abc"], "deps_mtime": null, "hash": "8c133962915479b7b3d537abbd00ccf4", "id": "string", "ignore_all": false, "interface_hash": "7ba37dbcf6f13d053878a8776c045821", "mtime": 1528718778, "options": {"always_false": [], "always_true": [], "check_untyped_defs": false, "disallow_any_decorated": false, "disallow_any_explicit": false, "disallow_any_expr": false, "disallow_any_generics": false, "disallow_any_unimported": false, "disallow_subclassing_any": false, "disallow_untyped_calls": false, "disallow_untyped_decorators": false, "disallow_untyped_defs": false, "follow_imports": "normal", "follow_imports_for_stubs": false, "ignore_errors": false, "ignore_missing_imports": false, "local_partial_types": false, "no_implicit_optional": false, "platform": "darwin", "quick_and_dirty": false, "show_none_errors": true, "strict_boolean": false, "strict_optional": true, "strict_optional_whitelist": null, "warn_no_return": true, "warn_return_any": false, "warn_unused_ignores": false}, "path": "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/3/string.pyi", "size": 1771, "suppressed": [], "version_id": "0.610"}
LOG:  Metadata fresh for string: file /Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/3/string.pyi
TRACE: Looking for time at .mypy_cache/3.6/time.meta.json
TRACE: Meta time {"child_modules": [], "data_mtime": 1528718789, "dep_lines": [4, 5, 7, 1, 1], "dep_prios": [10, 5, 5, 5, 30], "dependencies": ["sys", "typing", "types", "builtins", "abc"], "deps_mtime": null, "hash": "d0848c9c98081f61adce6cdcd1ea12f5", "id": "time", "ignore_all": false, "interface_hash": "83d2497dd833c3d6a57358de1b7487cd", "mtime": 1528718778, "options": {"always_false": [], "always_true": [], "check_untyped_defs": false, "disallow_any_decorated": false, "disallow_any_explicit": false, "disallow_any_expr": false, "disallow_any_generics": false, "disallow_any_unimported": false, "disallow_subclassing_any": false, "disallow_untyped_calls": false, "disallow_untyped_decorators": false, "disallow_untyped_defs": false, "follow_imports": "normal", "follow_imports_for_stubs": false, "ignore_errors": false, "ignore_missing_imports": false, "local_partial_types": false, "no_implicit_optional": false, "platform": "darwin", "quick_and_dirty": false, "show_none_errors": true, "strict_boolean": false, "strict_optional": true, "strict_optional_whitelist": null, "warn_no_return": true, "warn_return_any": false, "warn_unused_ignores": false}, "path": "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/2and3/time.pyi", "size": 3866, "suppressed": [], "version_id": "0.610"}
LOG:  Metadata fresh for time: file /Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/2and3/time.pyi
TRACE: Looking for threading at .mypy_cache/3.6/threading.meta.json
TRACE: Meta threading {"child_modules": [], "data_mtime": 1528718789, "dep_lines": [3, 7, 8, 1, 1], "dep_prios": [5, 5, 10, 5, 30], "dependencies": ["typing", "types", "sys", "builtins", "abc"], "deps_mtime": null, "hash": "8011ad17f4382e26f7fb479cd3be50d6", "id": "threading", "ignore_all": false, "interface_hash": "f62d103c8099f7eb7f9b2a0d64ed2d4e", "mtime": 1528718778, "options": {"always_false": [], "always_true": [], "check_untyped_defs": false, "disallow_any_decorated": false, "disallow_any_explicit": false, "disallow_any_expr": false, "disallow_any_generics": false, "disallow_any_unimported": false, "disallow_subclassing_any": false, "disallow_untyped_calls": false, "disallow_untyped_decorators": false, "disallow_untyped_defs": false, "follow_imports": "normal", "follow_imports_for_stubs": false, "ignore_errors": false, "ignore_missing_imports": false, "local_partial_types": false, "no_implicit_optional": false, "platform": "darwin", "quick_and_dirty": false, "show_none_errors": true, "strict_boolean": false, "strict_optional": true, "strict_optional_whitelist": null, "warn_no_return": true, "warn_return_any": false, "warn_unused_ignores": false}, "path": "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/2and3/threading.pyi", "size": 6492, "suppressed": [], "version_id": "0.610"}
LOG:  Metadata fresh for threading: file /Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/2and3/threading.pyi
TRACE: Looking for _importlib_modulespec at .mypy_cache/3.6/_importlib_modulespec.meta.json
TRACE: Meta _importlib_modulespec {"child_modules": [], "data_mtime": 1528718788, "dep_lines": [8, 9, 10, 1], "dep_prios": [5, 10, 5, 5], "dependencies": ["abc", "sys", "typing", "builtins"], "deps_mtime": null, "hash": "09004ca85efa650685c23791c33ab159", "id": "_importlib_modulespec", "ignore_all": false, "interface_hash": "9531beb50a822ca3cb3231a8a7503907", "mtime": 1528718778, "options":{"always_false": [], "always_true": [], "check_untyped_defs": false, "disallow_any_decorated": false, "disallow_any_explicit": false, "disallow_any_expr": false, "disallow_any_generics": false, "disallow_any_unimported": false, "disallow_subclassing_any": false, "disallow_untyped_calls": false, "disallow_untyped_decorators": false, "disallow_untyped_defs": false, "follow_imports": "normal","follow_imports_for_stubs": false, "ignore_errors": false, "ignore_missing_imports": false, "local_partial_types": false, "no_implicit_optional": false, "platform": "darwin", "quick_and_dirty": false, "show_none_errors": true, "strict_boolean": false, "strict_optional": true, "strict_optional_whitelist": null, "warn_no_return": true, "warn_return_any": false, "warn_unused_ignores": false}, "path": "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/3/_importlib_modulespec.pyi", "size": 1813, "suppressed": [], "version_id": "0.610"}
LOG:  Metadata fresh for _importlib_modulespec: file /Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/3/_importlib_modulespec.pyi
TRACE: Looking for importlib.abc at .mypy_cache/3.6/importlib/abc.meta.json
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LOG:  Metadata fresh for importlib.abc: file /Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/3/importlib/abc.pyi
TRACE: Looking for importlib at .mypy_cache/3.6/importlib/__init__.meta.json
TRACE: Meta importlib {"child_modules": ["importlib.util", "importlib.abc", "importlib.machinery"], "data_mtime": 1528718789, "dep_lines": [1, 2, 3, 4, 5, 1, 1], "dep_prios": [10, 5, 10, 10, 5, 5,30], "dependencies": ["importlib.util", "importlib.abc", "sys", "types", "typing", "builtins", "abc"], "deps_mtime": null, "hash": "0e34fbb5f56e88ae70ad7255827d7844", "id": "importlib", "ignore_all": false, "interface_hash": "c38b973ed98cbdf1abca0bb26e44fb98", "mtime": 1528718778, "options": {"always_false": [], "always_true": [], "check_untyped_defs": false, "disallow_any_decorated": false, "disallow_any_explicit": false, "disallow_any_expr": false, "disallow_any_generics": false, "disallow_any_unimported": false, "disallow_subclassing_any": false, "disallow_untyped_calls": false, "disallow_untyped_decorators": false, "disallow_untyped_defs": false, "follow_imports": "normal", "follow_imports_for_stubs": false, "ignore_errors": false, "ignore_missing_imports": false, "local_partial_types": false, "no_implicit_optional": false, "platform": "darwin", "quick_and_dirty": false, "show_none_errors": true, "strict_boolean": false, "strict_optional": true, "strict_optional_whitelist": null, "warn_no_return": true, "warn_return_any": false, "warn_unused_ignores": false}, "path": "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/3/importlib/__init__.pyi", "size": 709, "suppressed": [], "version_id": "0.610"}
LOG:  Metadata fresh for importlib: file /Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/3/importlib/__init__.pyi
TRACE: Looking for os at .mypy_cache/3.6/os/__init__.meta.json
TRACE: Meta os {"child_modules": ["os.path"], "data_mtime": 1528718788, "dep_lines": [4, 5, 6, 12, 13, 14, 1], "dep_prios": [5, 10, 5, 5, 5, 10, 30], "dependencies": ["io", "sys", "typing", "builtins", "posix", "os.path", "abc"], "deps_mtime": null, "hash": "d75b0533ec7ad873fe690ec772c78e8d", "id": "os", "ignore_all": false, "interface_hash": "0e0b41ba6b6aaeebcdf80a98ec1e7e44", "mtime": 1528718778, "options": {"always_false": [], "always_true": [], "check_untyped_defs": false, "disallow_any_decorated": false, "disallow_any_explicit": false, "disallow_any_expr": false, "disallow_any_generics": false, "disallow_any_unimported": false, "disallow_subclassing_any": false, "disallow_untyped_calls": false, "disallow_untyped_decorators": false, "disallow_untyped_defs": false, "follow_imports": "normal", "follow_imports_for_stubs": false, "ignore_errors": false, "ignore_missing_imports": false, "local_partial_types": false, "no_implicit_optional": false, "platform": "darwin", "quick_and_dirty": false, "show_none_errors": true, "strict_boolean": false, "strict_optional": true, "strict_optional_whitelist": null, "warn_no_return": true, "warn_return_any": false, "warn_unused_ignores": false}, "path": "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/3/os/__init__.pyi", "size": 27132, "suppressed": [], "version_id": "0.610"}
LOG:  Metadata fresh for os: file /Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/3/os/__init__.pyi
TRACE: Looking for importlib.util at .mypy_cache/3.6/importlib/util.meta.json
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LOG:  Metadata fresh for importlib.util: file /Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/3/importlib/util.pyi
TRACE: Looking for io at .mypy_cache/3.6/io.meta.json
TRACE: Meta io {"child_modules": [], "data_mtime": 1528718788, "dep_lines": [1, 4, 5, 6, 7, 8, 1], "dep_prios": [5, 10, 10, 5, 10, 5, 30], "dependencies": ["typing", "builtins", "codecs", "mmap", "sys", "types", "abc"], "deps_mtime": null, "hash": "7453c9c6f57bd4d24ad11f9796cdd2a8", "id": "io", "ignore_all": false, "interface_hash": "648e42e230bcc9e7415430cf9f8028e4", "mtime": 1528718778, "options": {"always_false": [], "always_true": [], "check_untyped_defs": false, "disallow_any_decorated": false, "disallow_any_explicit": false, "disallow_any_expr": false, "disallow_any_generics": false, "disallow_any_unimported": false, "disallow_subclassing_any": false, "disallow_untyped_calls": false, "disallow_untyped_decorators": false, "disallow_untyped_defs": false, "follow_imports": "normal", "follow_imports_for_stubs": false, "ignore_errors": false, "ignore_missing_imports": false, "local_partial_types": false, "no_implicit_optional": false, "platform": "darwin", "quick_and_dirty": false, "show_none_errors": true, "strict_boolean": false, "strict_optional": true, "strict_optional_whitelist": null, "warn_no_return": true, "warn_return_any": false, "warn_unused_ignores":false}, "path": "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/3/io.pyi", "size": 10514, "suppressed": [], "version_id": "0.610"}
LOG:  Metadata fresh for io: file /Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/3/io.pyi
TRACE: Looking for posix at .mypy_cache/3.6/posix.meta.json
TRACE: Meta posix {"child_modules": [], "data_mtime": 1528718788, "dep_lines": [5, 6, 1, 1], "dep_prios": [10, 5, 5, 30], "dependencies": ["sys", "typing", "builtins", "abc"], "deps_mtime": null, "hash": "422dd27650aebd83c5e8942ec4090a6d", "id": "posix", "ignore_all": false, "interface_hash": "594c2710fd8ffe3cda548414492f98c5", "mtime": 1528718778, "options": {"always_false": [], "always_true": [], "check_untyped_defs": false, "disallow_any_decorated": false, "disallow_any_explicit": false, "disallow_any_expr": false, "disallow_any_generics": false, "disallow_any_unimported": false, "disallow_subclassing_any": false, "disallow_untyped_calls": false, "disallow_untyped_decorators": false, "disallow_untyped_defs": false, "follow_imports": "normal", "follow_imports_for_stubs": false, "ignore_errors": false, "ignore_missing_imports": false, "local_partial_types": false, "no_implicit_optional": false, "platform": "darwin", "quick_and_dirty": false, "show_none_errors": true, "strict_boolean": false, "strict_optional": true, "strict_optional_whitelist": null, "warn_no_return": true, "warn_return_any": false, "warn_unused_ignores": false}, "path": "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/3/posix.pyi", "size": 2761, "suppressed": [], "version_id": "0.610"}
LOG:  Metadata fresh for posix: file /Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/3/posix.pyi
TRACE: Looking for os.path at .mypy_cache/3.6/os/path.meta.json
TRACE: Meta os.path {"child_modules": [], "data_mtime": 1528718788, "dep_lines": [5, 6, 7, 15, 1], "dep_prios": [5, 10, 5, 5, 30], "dependencies": ["posix", "sys", "typing", "builtins", "abc"], "deps_mtime": null, "hash": "5d7c85c6b51a5caa5ea8f9ab2da9a9dc", "id": "os.path", "ignore_all": false, "interface_hash": "5f77841cc8ef59e15e3b9b48ebb03dd7", "mtime": 1528718778, "options": {"always_false": [], "always_true": [], "check_untyped_defs": false, "disallow_any_decorated": false, "disallow_any_explicit": false, "disallow_any_expr": false, "disallow_any_generics": false, "disallow_any_unimported": false, "disallow_subclassing_any": false, "disallow_untyped_calls": false, "disallow_untyped_decorators": false, "disallow_untyped_defs": false, "follow_imports": "normal", "follow_imports_for_stubs": false, "ignore_errors": false, "ignore_missing_imports": false, "local_partial_types": false, "no_implicit_optional": false, "platform": "darwin", "quick_and_dirty": false, "show_none_errors": true, "strict_boolean": false, "strict_optional": true, "strict_optional_whitelist": null, "warn_no_return": true, "warn_return_any": false, "warn_unused_ignores": false}, "path": "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/3/os/path.pyi", "size": 6124, "suppressed": [], "version_id": "0.610"}
LOG:  Metadata fresh for os.path: file /Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/3/os/path.pyi
TRACE: Looking for importlib.machinery at .mypy_cache/3.6/importlib/machinery.meta.json
TRACE: Meta importlib.machinery {"child_modules": [], "data_mtime": 1528718789, "dep_lines": [1, 1, 2, 3, 4, 9, 1, 1], "dep_prios": [20, 10, 10, 10, 5, 5, 5, 30], "dependencies": ["importlib", "importlib.abc", "sys", "types", "typing", "_importlib_modulespec", "builtins", "abc"], "deps_mtime": null, "hash": "18f1509f4c7bac3905a891bfe1574c95", "id": "importlib.machinery", "ignore_all": false, "interface_hash": "ed77d2c80905f2bcd6a9e389bf524360", "mtime": 1528718778, "options": {"always_false": [], "always_true": [], "check_untyped_defs": false, "disallow_any_decorated": false, "disallow_any_explicit": false, "disallow_any_expr": false, "disallow_any_generics": false, "disallow_any_unimported": false, "disallow_subclassing_any": false, "disallow_untyped_calls": false, "disallow_untyped_decorators": false, "disallow_untyped_defs": false, "follow_imports": "normal", "follow_imports_for_stubs": false, "ignore_errors": false, "ignore_missing_imports": false, "local_partial_types": false, "no_implicit_optional": false, "platform": "darwin", "quick_and_dirty": false, "show_none_errors": true, "strict_boolean": false, "strict_optional": true, "strict_optional_whitelist": null, "warn_no_return": true, "warn_return_any": false, "warn_unused_ignores": false}, "path": "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/3/importlib/machinery.pyi", "size": 7012, "suppressed": [], "version_id": "0.610"}
LOG:  Metadata fresh for importlib.machinery: file /Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/3/importlib/machinery.pyi
TRACE: Looking for codecs at .mypy_cache/3.6/codecs.meta.json
TRACE: Meta codecs {"child_modules": [], "data_mtime": 1528718788, "dep_lines": [3, 4, 20, 21, 1], "dep_prios": [10, 5, 5, 10, 5], "dependencies": ["sys", "typing", "abc", "types", "builtins"], "deps_mtime": null, "hash": "f7942aaae6e6c5c52c24fcc57b041099", "id": "codecs", "ignore_all": false, "interface_hash": "1baccfdab9fbdd119ec22f62f8663ae1", "mtime": 1528718778, "options": {"always_false": [], "always_true": [], "check_untyped_defs": false, "disallow_any_decorated": false, "disallow_any_explicit": false, "disallow_any_expr": false, "disallow_any_generics": false, "disallow_any_unimported": false, "disallow_subclassing_any": false, "disallow_untyped_calls": false, "disallow_untyped_decorators": false, "disallow_untyped_defs": false, "follow_imports": "normal", "follow_imports_for_stubs": false, "ignore_errors": false, "ignore_missing_imports": false, "local_partial_types": false, "no_implicit_optional": false, "platform": "darwin", "quick_and_dirty": false, "show_none_errors": true, "strict_boolean": false, "strict_optional": true, "strict_optional_whitelist": null, "warn_no_return": true, "warn_return_any": false, "warn_unused_ignores": false}, "path": "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/2and3/codecs.pyi", "size": 8711, "suppressed": [], "version_id": "0.610"}
LOG:  Metadata fresh for codecs: file /Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/2and3/codecs.pyi
TRACE: Looking for mmap at .mypy_cache/3.6/mmap.meta.json
TRACE: Meta mmap {"child_modules": [], "data_mtime": 1528718788, "dep_lines": [1, 2, 1, 1], "dep_prios": [10, 5, 5, 30], "dependencies": ["sys", "typing", "builtins", "abc"], "deps_mtime": null, "hash": "52640e7a9c6c085ca310a8cd992b4823", "id": "mmap", "ignore_all": false, "interface_hash": "5b382e7a1b0afbd536350568034b83f9", "mtime": 1528718778, "options": {"always_false": [], "always_true": [], "check_untyped_defs": false, "disallow_any_decorated": false, "disallow_any_explicit": false, "disallow_any_expr": false, "disallow_any_generics": false, "disallow_any_unimported": false, "disallow_subclassing_any": false, "disallow_untyped_calls": false, "disallow_untyped_decorators": false, "disallow_untyped_defs": false, "follow_imports": "normal", "follow_imports_for_stubs": false, "ignore_errors": false, "ignore_missing_imports": false, "local_partial_types": false, "no_implicit_optional": false, "platform": "darwin", "quick_and_dirty": false, "show_none_errors": true, "strict_boolean": false, "strict_optional": true, "strict_optional_whitelist": null, "warn_no_return": true, "warn_return_any": false, "warn_unused_ignores": false}, "path": "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/2and3/mmap.pyi", "size": 2904, "suppressed": [], "version_id": "0.610"}
LOG:  Metadata fresh for mmap: file /Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/mypy/typeshed/stdlib/2and3/mmap.pyi
LOG:  Loaded graph with 25 nodes (0.030 sec)
LOG:  Found 8 SCCs; largest has 18 nodes
TRACE: Priorities for _importlib_modulespec: abc:5 sys:10 typing:5 builtins:5
TRACE: Priorities for types: sys:10 typing:5 _importlib_modulespec:5 builtins:5 abc:30
TRACE: Priorities for abc: typing:5 sys:10 builtins:5
TRACE: Priorities for typing: sys:10 abc:5 types:5 collections:10 builtins:5
TRACE: Priorities for mmap: sys:10 typing:5 builtins:5 abc:30
TRACE: Priorities for codecs: sys:10 typing:5 abc:5 types:10 builtins:5
TRACE: Priorities for posix: sys:10 typing:5 builtins:5 abc:30
TRACE: Priorities for importlib.abc: abc:5 os:10 sys:10 types:10 typing:5 _importlib_modulespec:5 builtins:5
TRACE: Priorities for collections: sys:10 typing:5 collections.abc:10 builtins:5 abc:30
TRACE: Priorities for os.path: posix:5 sys:10 typing:5 builtins:5 abc:30
TRACE: Priorities for io: typing:5 builtins:10 codecs:10 mmap:5 sys:10 types:5 abc:30
TRACE: Priorities for collections.abc: sys:10 collections:5 builtins:5 abc:30 typing:30
TRACE: Priorities for sys: typing:5 types:5 importlib.abc:5 builtins:5 _importlib_modulespec:30 abc:30 importlib:30
TRACE: Priorities for os: io:5 sys:10 typing:5 builtins:5 posix:5 os.path:10 abc:30
TRACE: Priorities for importlib.machinery: importlib:20 importlib.abc:10 sys:10 types:10 typing:5 _importlib_modulespec:5 builtins:5 abc:30
TRACE: Priorities for importlib.util: importlib:20 importlib.abc:10 importlib.machinery:10 sys:10 types:10 typing:5 builtins:5 abc:30
TRACE: Priorities for importlib: importlib.util:10 importlib.abc:5 sys:10 types:10 typing:5 builtins:5 abc:30
TRACE: Priorities for builtins: typing:5 abc:5 types:5 sys:10
TRACE: Queuing fresh SCC (_importlib_modulespec types abc typing mmap codecs posix importlib.abc collections os.path io collections.abc sys os importlib.machinery importlib.util importlib builtins)
TRACE: Priorities for threading:
TRACE: Queuing fresh SCC (threading)
TRACE: Priorities for time:
TRACE: Queuing fresh SCC (time)
TRACE: Priorities for string:
TRACE: Queuing fresh SCC (string)
TRACE: Priorities for ignored.two:
TRACE: Queuing fresh SCC (ignored.two)
TRACE: Priorities for ignored:
TRACE: Queuing fresh SCC (ignored)
TRACE: Priorities for logging:
TRACE: Queuing fresh SCC (logging)
TRACE: Priorities for one:
LOG:  Processing 7 queued fresh SCCs
LOG:  Build finished in 0.344 seconds with 23 modules, and 0 errors
Traceback (most recent call last):
  File "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/bin/mypy", line 11, in <module>
    sys.exit(console_entry())
  File "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/python3.6/site-packages/mypy/__main__.py", line 7, in console_entry
    main(None)
  File "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/python3.6/site-packages/mypy/main.py", line 91, in main
    res = type_check_only(sources, bin_dir, options, flush_errors, fscache)  # noqa
  File "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/python3.6/site-packages/mypy/main.py", line 148, in type_check_only
    fscache=fscache)
  File "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/python3.6/site-packages/mypy/build.py", line 185, in build
    flush_errors, fscache)
  File "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/python3.6/site-packages/mypy/build.py", line 285, in _build
    graph = dispatch(sources, manager)
  File "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/python3.6/site-packages/mypy/build.py", line 2398, in dispatch
    process_graph(graph, manager)
  File "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/python3.6/site-packages/mypy/build.py", line 2684, in process_graph
    process_fresh_modules(graph, prev_scc, manager)
  File "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/python3.6/site-packages/mypy/build.py", line 2770, in process_fresh_modules
    graph[id].fix_cross_refs()
  File "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/python3.6/site-packages/mypy/build.py", line 1853, in fix_cross_refs
    self.options.use_fine_grained_cache)
  File "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/python3.6/site-packages/mypy/fixup.py", line 25, in fixup_module
    node_fixer.visit_symbol_table(tree.names)
  File "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/python3.6/site-packages/mypy/fixup.py", line 95, in visit_symbol_table
    self.visit_type_info(value.node)
  File "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/python3.6/site-packages/mypy/fixup.py", line 48, in visit_type_info
    base.accept(self.type_fixer)
  File "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/python3.6/site-packages/mypy/types.py", line 512, in accept
    return visitor.visit_instance(self)
  File "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/python3.6/site-packages/mypy/fixup.py", line 156, in visit_instance
    inst.type = lookup_qualified_typeinfo(self.modules, type_ref, self.quick_and_dirty)
  File "/Users/pradyunsg/.venvwrap/venvs/tmp-6d13a16911bf03c/lib/python3.6/site-packages/mypy/fixup.py", line 246, in lookup_qualified_typeinfo
    assert quick_and_dirty, "Should never get here in normal mode"
AssertionError: Should never get here in normal mode

Is it just me or does this look very weird?

Yes it is. But I think I understand the idea, it seems to me all this weird dance is needed to convince mypy it needs to deserialize MyClass that has an apparently broken base. I didn't test this hypothesis, will try this later.

from collections import namedtuple

a = ['alpha', 'beta']


class MyClass(namedtuple('MyClass', a)):
    pass

This crashes as well.

OK, my hypothesis has another confirmation, just running a single file with MyClass and looking at the cache file I found this in cache entry for MyClass: "bases": ["test.namedtuple"] (note wrong module). So apparently this is just another manifestation of #4287 (assigned to me :P)

So, close as a duplicate and add crash label to #4287?

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Crash with "AssertionError: Should never get here in normal mode" #5192

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Crash with "AssertionError: Should never get here in normal mode" #5192

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pradyunsg commented on Jun 11, 2018

emmatyping commented on Jun 11, 2018

pradyunsg commented on Jun 11, 2018

pradyunsg commented on Jun 11, 2018

ilevkivskyi commented on Jun 11, 2018

pradyunsg commented on Jun 11, 2018

pradyunsg commented on Jun 11, 2018

ilevkivskyi commented on Jun 11, 2018

pradyunsg commented on Jun 11, 2018

pradyunsg commented on Jun 11, 2018

pradyunsg commented on Jun 11, 2018

ilevkivskyi commented on Jun 11, 2018

pradyunsg commented on Jun 11, 2018

ilevkivskyi commented on Jun 13, 2018

gvanrossum commented on Jun 13, 2018

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