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

670622f4 · Yukihiro "Matz" Matsumoto · 6334949b · 670622f4
Unverified Commit 670622f4 authored Jul 21, 2020 by Yukihiro "Matz" Matsumoto
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src/gc.c src/gc.c +3 -1

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--- 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);
+  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);