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Using the collecting variable of iterable unpacking causes "used before definition" error #3543

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Using the collecting variable of iterable unpacking causes "used before definition" error#3543
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area-intellisenseLSP-related functionality: auto-complete, docstrings, navigation, refactoring, etc.bugIssue identified by VS Code Team member as probable bug

Description

@mcpower
mcpower
opened on Dec 4, 2018

Using the example from the PEP:

a, *b, c = range(5)
print(b)

produces

{
	"owner": "_generated_diagnostic_collection_name_#0",
	"code": "use-before-def",
	"severity": 4,
	"message": "'b' used before definition",
	"source": "Python",
	"startLineNumber": 2,
	"startColumn": 7,
	"endLineNumber": 2,
	"endColumn": 8
}

Environment data

  • VS Code version: 1.29.1
  • Extension version (available under the Extensions sidebar): 2018.11.0
  • OS and version: Windows 10 1803
  • Python version (& distribution if applicable, e.g. Anaconda): CPython 3.7.0
  • Python Language Server version: 0.1.65.0

Activity

  1. Brett Cannon (brettcannon)
    added
    bugIssue identified by VS Code Team member as probable bug
    area-intellisenseLSP-related functionality: auto-complete, docstrings, navigation, refactoring, etc.
    upstream-language server
    needs upstream fix
    on Dec 5, 2018

  2. mcpower commented on Jun 30, 2019

    @mcpower
    mcpower
    on Jun 30, 2019
    Author

    I can confirm that this has been fixed in a recent version of the language server.

  3. mcpower
    closed this as completedon Jun 30, 2019
  4. ghost removed
    needs upstream fix
    on Jun 30, 2019
  5. lock
    locked as resolved and limited conversation to collaborators on Jul 7, 2019
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