[3.13] gh-117657: Fix race involving immortalizing objects (GH-119927) #120005
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) The free-threaded build currently immortalizes objects that use deferred reference counting (see pythongh-117783). This typically happens once the first non-main thread is created, but the behavior can be suppressed for tests, in subinterpreters, or during a compile() call. This fixes a race condition involving the tracking of whether the behavior is suppressed. (cherry picked from commit 47fb432)
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The free-threaded build currently immortalizes objects that use deferred reference counting (see gh-117783). This typically happens once the first non-main thread is created, but the behavior can be suppressed for tests, in subinterpreters, or during a compile() call.
This fixes a race condition involving the tracking of whether the behavior is suppressed.
(cherry picked from commit 47fb432)