Deallocate `s->lines` in `codegen_error`; ref
MODIFY
mrbgems/mruby-compiler/core/codegen.c
mrbgems/mruby-compiler/core/codegen.c
@@ -102,6 +102,7 @@ codegen_error(codegen_scope *s, const char *message)
while (s->prev) {
codegen_scope *tmp = s->prev;
mrb_free(s->mrb, s->iseq);
+ mrb_free(s->mrb, s->lines);
mrb_pool_close(s->mpool);
s = tmp;
}

Deallocate `s->lines` in `codegen_error`; ref #4370