GitHub free threading CI failing with SIGTERM

[colesbury]

Bug report

Randomly GitHub Ubuntu (free-threading) / build and test (ubuntu-24.04) CI is failing with a SIGTERM (exit code 134).

My best guess is that the VM is running out of memory due to a test using too much memory

0:08:51 load avg: 14.72 [272/505] test.test_asyncio.test_pep492 passed -- running (2): test.test_multiprocessing_spawn.test_processes (3 min 23 sec), test_free_threading (6 min)
make: *** [Makefile:2434: ci] Terminated
Error: Process completed with exit code 143.

Examples:

• https://github.com/python/cpython/actions/runs/26119235383/job/76816784271?pr=150102
• https://github.com/python/cpython/actions/runs/26119705469/attempts/2?pr=150104
• https://github.com/python/cpython/actions/runs/26119705469/job/76829435372?pr=150104

Linked PRs

• gh-150114: Reduce memory usage of test_free_threading.test_iteration #150115
• [3.15] gh-150114: Reduce memory usage of test_free_threading.test_iteration (gh-150115) #150124
• [3.14] gh-150114: Reduce memory usage of test_free_threading.test_iteration (gh-150115) #150123