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Proxy error for typed-ast (SystemError or "duplicate type signatures") #3127

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gvanrossum opened this issue Apr 4, 2017 · 1 comment
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Proxy error for typed-ast (SystemError or "duplicate type signatures") #3127

gvanrossum opened this issue Apr 4, 2017 · 1 comment

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@gvanrossum
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gvanrossum commented Apr 4, 2017 •
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This is mostly for people searching our issue tracker. If you get one of these errors and there's nothing wrong with your source, it's probably this typed_ast issue: python/typed_ast#36

  • SystemError: <built-in function _parse> returned a result with an error set
  • Function has duplicate type signatures

This issue should be closed once the typed_ast error is fixed, a new typed_ast error is pushed to PyPI, and the dependencies in mypy master are updated.
@gvanrossum
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I had an internal diff that was consistently failing with this problem and it is passing with python/typed_ast#38 applied, so I am confident that we've nailed the issue.

gvanrossum pushed a commit that referenced this issue Apr 10, 2017
@ddfisher @gvanrossum
Bump required typed_ast version to 1.0.3 (#3152)
d6ed083 
This includes the important uninitialized read fix (python/typed_ast#38).

For cross-reference, see also #3127 (which is now closed).
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