Skip unnecessary `mark_context` if `mrb->c == mrb->root_c`.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/gc.c b/src/gc.c
index fd4fb2406..135d7416d 100644
--- a/src/gc.c
+++ b/src/gc.c
@@ -1076,7 +1076,9 @@ final_marking_phase(mrb_state *mrb, mrb_gc *gc)
   }
   mrb_gc_mark_gv(mrb);
   mark_context(mrb, mrb->c);
-  mark_context(mrb, mrb->root_c);
+  if (mrb->c != mrb->root_c) {
+    mark_context(mrb, mrb->root_c);
+  }
   mrb_gc_mark(mrb, (struct RBasic*)mrb->exc);
   gc_mark_gray_list(mrb, gc);
   mrb_assert(gc->gray_list == NULL);