[3.15] gh-158451: Fix python-gdb.py for invalid Unicode strings (GH-158475) - #158496
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…nGH-158475) python-gdb.py is now able to format an invalid Unicode string: render invalid characters as "\Uhhhhhhhh" instead of raising an exception. The PyUnicodeWriter API fills a UCS-4 buffer with 0xff byte pattern to detect usage of uninitialized characters. It produces invalid characters '\Uffffffff'. PyBytesObjectPtr now iterates on bytes (list of integers), instead of creating a temporary Unicode string. Add more bytes tests in test_gdb pretty printer. Remove the unused 'ch2' variable. (cherry picked from commit 7eada7c2c63189fbe753cf5e84b77baf4099a4a1) Co-authored-by: Victor Stinner <vstinner@python.org>
vstinner
approved these changes
Sep 30, 2026
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python-gdb.py is now able to format an invalid Unicode string:
render invalid characters as "\Uhhhhhhhh" instead of raising an
exception.
The PyUnicodeWriter API fills a UCS-4 buffer with 0xff byte pattern
to detect usage of uninitialized characters. It produces invalid
characters '\Uffffffff'.
PyBytesObjectPtr now iterates on bytes (list of integers), instead of
creating a temporary Unicode string. Add more bytes tests in test_gdb
pretty printer.
Remove the unused 'ch2' variable.
(cherry picked from commit 7eada7c)
Co-authored-by: Victor Stinner vstinner@python.org