[issue3554] ctypes.wstring_at and string_at call Python API without the GIL

[Thomas Heller]

Thomas Heller <theller at ctypes.org> added the comment:

Good catch!  Indeed, when PyString_FromString or PyUnicode_FromWideChar
fail, Python crashes with
  Fatal Python error: PyThreadState_Get: no current thread
in a debug build, and an access violation in a release build (tested on
Windows).

Also, your patch suggestion is absolutely correct and fixes the problem.

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