Avoid invoking GC when disabled or iterating; fix #3681

51e0e690 · Yukihiro "Matz" Matsumoto · 87cc0344 · 51e0e690
Commit 51e0e690 authored Jun 01, 2017 by Yukihiro "Matz" Matsumoto
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src/gc.c src/gc.c +4 -0

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--- a/src/gc.c
+++ b/src/gc.c
@@ -1436,6 +1436,10 @@ gc_step_ratio_set(mrb_state *mrb, mrb_value obj)
 static void
 change_gen_gc_mode(mrb_state *mrb, mrb_gc *gc, mrb_bool enable)
 {
+  if (gc->disabled || gc->iterating) {
+    gc->generational = enable;
+    return;
+  }
  if (is_generational(gc) && !enable) {
    clear_all_old(mrb, gc);
    mrb_assert(gc->state == MRB_GC_STATE_ROOT);