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Title: [3.14] gh-146196: Fix Undefined Behavior in _PyUnicodeWriter_WriteASCIIString() (#146201) by vstinner · Pull Request #146220 · python/cpython · GitHub

Open Graph Title: [3.14] gh-146196: Fix Undefined Behavior in _PyUnicodeWriter_WriteASCIIString() (#146201) by vstinner · Pull Request #146220 · python/cpython

X Title: [3.14] gh-146196: Fix Undefined Behavior in _PyUnicodeWriter_WriteASCIIString() (#146201) by vstinner · Pull Request #146220 · python/cpython

Description: The Python programming language. Contribute to python/cpython development by creating an account on GitHub.

Open Graph Description: Avoid calling memcpy(data + writer->pos, NULL, 0) which has an undefined behavior. (cherry picked from commit cd10a2e) Issue: Undefined Behavior in _PyUnicodeWriter_WriteASCIIString: NULL poi...

X Description: Avoid calling memcpy(data + writer->pos, NULL, 0) which has an undefined behavior. (cherry picked from commit cd10a2e) Issue: Undefined Behavior in _PyUnicodeWriter_WriteASCIIString: NULL...

Opengraph URL: https://github.com/python/cpython/pull/146220

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og:image:altAvoid calling memcpy(data + writer->pos, NULL, 0) which has an undefined behavior. (cherry picked from commit cd10a2e) Issue: Undefined Behavior in _PyUnicodeWriter_WriteASCIIString: NULL poi...
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Undefined Behavior in _PyUnicodeWriter_WriteASCIIString: NULL pointer passed to memcpy when len is 0 #146196 https://github.com/python/cpython/issues/146196
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