1 files changed, 3 insertions, 2 deletions
diff --git a/gc.c b/gc.c
index 1503d42a74..e5ecea76f4 100644
--- a/gc.c
+++ b/gc.c
@@ -863,8 +863,9 @@ gc_sweep()
     int freed = 0;
     int i, used = heaps_used;
 
-    if (ruby_in_compile) {
-	/* should not reclaim nodes during compilation */
+    if (ruby_in_compile && ruby_parser_stack_on_heap()) {
+	/* should not reclaim nodes during compilation
+           if yacc's semantic stack is not allocated on machine stack */
 	for (i = 0; i < used; i++) {
 	    p = heaps[i]; pend = p + heaps_limits[i];
 	    while (p < pend) {