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-rw-r--r--Python/pystate.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/Python/pystate.c b/Python/pystate.c
index 8df2807..273982b 100644
--- a/Python/pystate.c
+++ b/Python/pystate.c
@@ -148,12 +148,15 @@ _PyRuntimeState_ReInitThreads(_PyRuntimeState *runtime)
_PyMem_SetDefaultAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
int reinit_interp = _PyThread_at_fork_reinit(&runtime->interpreters.mutex);
- int reinit_main_id = _PyThread_at_fork_reinit(&runtime->interpreters.main->id_mutex);
int reinit_xidregistry = _PyThread_at_fork_reinit(&runtime->xidregistry.mutex);
int reinit_unicode_ids = _PyThread_at_fork_reinit(&runtime->unicode_ids.lock);
PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
+ /* bpo-42540: id_mutex is freed by _PyInterpreterState_Delete, which does
+ * not force the default allocator. */
+ int reinit_main_id = _PyThread_at_fork_reinit(&runtime->interpreters.main->id_mutex);
+
if (reinit_interp < 0
|| reinit_main_id < 0
|| reinit_xidregistry < 0