fix #1442
@@ -677,6 +677,10 @@ root_scan_phase(mrb_state *mrb)
mrb_gc_mark(mrb, (struct RBasic*)mrb->exc);
mark_context(mrb, mrb->root_c);
if (mrb->root_c != mrb->c) {
mark_context(mrb, mrb->c);
}
/* mark irep pool */
if (mrb->irep) {
size_t len = mrb->irep_len;
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