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-rw-r--r--Modules/_tracemalloc.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/Modules/_tracemalloc.c b/Modules/_tracemalloc.c
index 5f45f3d20f..4d48ee82d1 100644
--- a/Modules/_tracemalloc.c
+++ b/Modules/_tracemalloc.c
@@ -168,6 +168,7 @@ get_reentrant(void)
static void
set_reentrant(int reentrant)
{
+ assert(reentrant == 0 || reentrant == 1);
if (reentrant) {
assert(PyThread_get_key_value(tracemalloc_reentrant_key) == NULL);
PyThread_set_key_value(tracemalloc_reentrant_key,