Removed a debug printf; fix
MODIFY
src/vm.c
src/vm.c
@@ -151,9 +151,6 @@ envadjust(mrb_state *mrb, mrb_value *oldbase, mrb_value *newbase, size_t size)
e->stack = newbase + off;
}
- else if (e && MRB_ENV_STACK_SHARED_P(e)) {
- fprintf(stderr, "bingo! %p\n", e);
- }
ci->stackent = newbase + (ci->stackent - oldbase);
ci++;
}

Removed a debug printf; fix #3834