Crash report

What happened?

Minimal repro:

print("Reproducing!")exec("",closure=object())

Fails with

Reproducing!python: Python/ast.c:1047: _PyAST_Validate: Assertion `!PyErr_Occurred()' failed.Aborted (core dumped)

Note the error occurs not because the passedclosure= is incorrect (it should be a tuple of cell objects), but becauseclosure= is not allowed when string is the source.

The reason for that to happen is a missinggoto error jump:

causing the rest of the code to execute and reach_PyAST_Validate.

In the PR, I included the missing test case.

CPython versions tested on:

CPython main branch

Operating systems tested on:

Linux

Output from running 'python -VV' on the command line:

Python 3.14.0a5+ (heads/main-dirty:f9a7d41bacb, Feb 13 2025, 04:52:15) [GCC 11.4.0]

Linked PRs

• gh-130070: Fixexec(<string>, closure=<non-None>) unexpected path #130071
• [3.13] gh-130070: Fixexec(<string>, closure=<non-None>) unexpected path (GH-130071) #132627