Function on_catch

malloc1/tests.c:27–30

  bool caught = false;
    
  void on_catch(struct hc_error *e) {
    assert(hc_streq(e->message, HC_NO_MEMORY) == 0);
    caught = true;
  }
    
  hc_catch(on_catch) {
    hc_acquire(&a.malloc, s);