1 files changed, 8 insertions, 0 deletions
diff --git a/scope.c b/scope.c
index 3b4428f945..bca1c2b455 100644
--- a/scope.c
+++ b/scope.c
@@ -19,8 +19,16 @@ SV**
 stack_grow(SV **sp, SV **p, int n)
 {
     dTHR;
+#if defined(DEBUGGING) && !defined(USE_THREADS)
+    static int growing = 0;
+    if (growing++)
+      abort();
+#endif
     stack_sp = sp;
     av_extend(curstack, (p - stack_base) + (n) + 128);
+#if defined(DEBUGGING) && !defined(USE_THREADS)
+    growing--;
+#endif
     return stack_sp;
 }