[issue39877] Daemon thread is crashing in PyEval_RestoreThread() while the main thread is exiting the process

[STINNER Victor]

STINNER Victor <vstin...@python.org> added the comment:

Patch to get a cleaner error if the bug occurs, but also to make the bug more 
reliable:

diff --git a/Python/ceval.c b/Python/ceval.c
index ef4aac2f9a..8bf1e4766d 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -382,7 +382,8 @@ PyEval_SaveThread(void)
 void
 PyEval_RestoreThread(PyThreadState *tstate)
 {
-    assert(tstate != NULL);
+    assert(!_PyMem_IsPtrFreed(tstate));
+    assert(!_PyMem_IsPtrFreed(tstate->interp));
 
     _PyRuntimeState *runtime = tstate->interp->runtime;
     struct _ceval_runtime_state *ceval = &runtime->ceval;

----------

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<https://bugs.python.org/issue39877>
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