Bug report

Bug description:

The tracemalloc_tracebacks hash table has traceback keys and NULL values, but its destructors do not reflect this -- key_destroy_func is NULL while value_destroy_func is raw_free. The leaked traceback keys can be seen with AddressSanitizer:

./configure --with-pydebug --with-address-sanitizer
make -j "$(nproc)"
./python -X tracemalloc -c 'print("hello there")'

CPython versions tested on:

CPython main branch

Operating systems tested on:

Linux

Linked PRs

• gh-121390: tracemalloc: Fix tracebacks memory leak #121391
• [3.13] gh-121390: tracemalloc: Fix tracebacks memory leak (GH-121391) #121392
• [3.12] gh-121390: tracemalloc: Fix tracebacks memory leak (GH-121391) #121393