Bug report

Bug description:

When the value passed to Py_ABS() macro is LLONG_MIN (or any min value of a signed integer), the macro suffers from undefined behavior. This was detected in a failure to build the OSS-Fuzz test suite.

CPython versions tested on:

CPython main branch

Operating systems tested on:

No response

Linked PRs

• gh-141370: document undefined behavior of Py_ABS() #141439
• [3.14] gh-141370: document undefined behavior of Py_ABS() (GH-141439) #141454
• [3.13] gh-141370: document undefined behavior of Py_ABS() (GH-141439) #141455
• gh-141370: Fix undefined behavior when using Py_ABS() #141548
• [3.14] gh-141370: Fix undefined behavior when using Py_ABS() (GH-141548) #142301
• [3.13] gh-141370: Fix undefined behavior when using Py_ABS() (GH-141548) #142304