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This repository was archived by the owner on Mar 8, 2020. It is now read-only.
This repository was archived by the owner on Mar 8, 2020. It is now read-only.

NegativeArraySizeException (StackOverflowError) #52

Open
Open
NegativeArraySizeException (StackOverflowError)#52
Assignees
kuba--
Labels
blockedbug

Description

@ncordon
ncordon
opened on Jul 24, 2019

From bblfsh logs we got the error:

rpc error: code = Internal desc = tech.sourced.babelfish.DriverResponse.ResponseSendException
Error serializing the AST to JSON: com.fasterxml.jackson.databind.JsonMappingException: (was java.lang.NegativeArraySizeException) (through reference chain: tech.sourced.babelfish.DriverResponse[\"ast\"])
tech.sourced.babelfish.DriverResponse$ResponseSendException: com.fasterxml.jackson.databind.JsonMappingException: (was java.lang.NegativeArraySizeException) (through reference chain: tech.sourced.babelfish.DriverResponse[\"ast\"])
...

Files that triggered the error:

external/bsd/llvm/dist/clang/test/Index/annotate-deep-statements.cpp
src/pal/src/misc/sysinfo.cpp

Activity

  1. ncordon
    added
    bug
    on Jul 24, 2019

  2. kuba-- commented on Sep 20, 2019

    @kuba--
    kuba--
    on Sep 20, 2019
    Member

    NegativeArraySizeException may come from stack overflow trying to annotate an extremely deep AST.:

    Example 
    struct S {
  S &operator()();
};

void foo() {
  S s;
  s()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()
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    ;
}
    Details

  3. dennwc commented on Sep 20, 2019

    @dennwc
    dennwc
    on Sep 20, 2019
    Member

    For the clarification, @kuba--'s example is from the file mentioned by the log.

    Given that it indeed looks like stack overflow (or similar kind of issue), we may want to report it to CDT.

  4. kuba-- commented on Sep 20, 2019

    @kuba--
    kuba--
    on Sep 20, 2019
    Member

    After some deep investigation, we can submit another issue to CDT, but I have a feeling that cdt-core is almost frozen and nothing is going on there. I submitted a previous issue almost month ago, and nobody took a look, so far.

  5. kuba--
    self-assigned this
    on Sep 20, 2019

  6. dennwc commented on Sep 20, 2019

    @dennwc
    dennwc
    on Sep 20, 2019
    Member

    If there is no activity on PRs we should consider either forking it, or maybe use something else as the C/C++ parser.

  7. kuba-- commented on Sep 22, 2019

    @kuba--
    kuba--
    on Sep 22, 2019
    Member

    switching to something else will require much more work, but fork sounds reasonable to me

  8. creachadair commented on Sep 23, 2019

    @creachadair
    creachadair
    on Sep 23, 2019
    Contributor

    Clang is an obvious choice, but migrating to a different C++ parser is likely to be a fairly involved project. Is the scope of the failure right now something that affects a lot of programs, or is it something we can afford to mitigate in a less-expensive way for now?

  9. dennwc commented on Sep 24, 2019

    @dennwc
    dennwc
    on Sep 24, 2019
    Member

    @creachadair It looks like it happens only on (real) C++ parser test files, not on files written by humans, so it may be safe to ignore. Also, according to the issue description, there is only two files that produce this error in the PGA (or other dataset used for the large parse by ML).

  10. kuba-- commented on Oct 1, 2019

    @kuba--
    kuba--
    on Oct 1, 2019
    Member

    More details about CDT's exception:

    Error serializing the AST to JSON: com.fasterxml.jackson.databind.JsonMappingException: Infinite recursion (StackOverflowError)

java.lang.StackOverflowError at
org.eclipse.cdt.internal.core.dom.parser.cpp.CPPASTFunctionCallExpression.checkForExplicitTypeConversion(CPPASTFunctionCallExpression.java:305)
org.eclipse.cdt.internal.core.dom.parser.cpp.CPPASTFunctionCallExpression.computeEvaluation(CPPASTFunctionCallExpression.java:286)
org.eclipse.cdt.internal.core.dom.parser.cpp.CPPASTFunctionCallExpression.getEvaluation(CPPASTFunctionCallExpression.java:277)
org.eclipse.cdt.internal.core.dom.parser.cpp.CPPASTFunctionCallExpression.computeEvaluation(CPPASTFunctionCallExpression.java:291)
org.eclipse.cdt.internal.core.dom.parser.cpp.CPPASTFunctionCallExpression.getEvaluation(CPPASTFunctionCallExpression.java:277)
org.eclipse.cdt.internal.core.dom.parser.cpp.CPPASTFunctionCallExpression.computeEvaluation(CPPASTFunctionCallExpression.java:291)
org.eclipse.cdt.internal.core.dom.parser.cpp.CPPASTFunctionCallExpression.getEvaluation(CPPASTFunctionCallExpression.java:277)

  11. kuba-- commented on Oct 1, 2019

    @kuba--
    kuba--
    on Oct 1, 2019
    Member

    Shall we submit yet another issue to CDT and keep it blocked or just close it?
    I agree, the reproducible example is pretty artificial.

  12. kuba--
    added
    blocked
    on Oct 1, 2019
  13. kuba--
    changed the title [-]Error serializing the AST to JSON[/-] [+]NegativeArraySizeException (StackOverflowError)[/+] on Oct 1, 2019

  14. dennwc commented on Oct 1, 2019

    @dennwc
    dennwc
    on Oct 1, 2019
    Member

    Let's keep it blocked.

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