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-rw-r--r--Python/import.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/Python/import.c b/Python/import.c
index 2f71b97..5fc2523 100644
--- a/Python/import.c
+++ b/Python/import.c
@@ -169,6 +169,7 @@ _PyImport_AcquireLock(void)
PyThread_acquire_lock(import_lock, 1);
PyEval_RestoreThread(tstate);
}
+ assert(import_lock_level == 0);
import_lock_thread = me;
import_lock_level = 1;
}
@@ -182,6 +183,7 @@ _PyImport_ReleaseLock(void)
if (import_lock_thread != me)
return -1;
import_lock_level--;
+ assert(import_lock_level >= 0);
if (import_lock_level == 0) {
import_lock_thread = -1;
PyThread_release_lock(import_lock);