libcxx/test/std/containers/associative/map/PR28469_undefined_behavior_segfault.sh.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // UNSUPPORTED: c++03
  10
  11 // RUN: %{build} -O2
  12 // RUN: %{run}
  13
  14 // <map>
  15
  16 // Previously this code caused a segfault when compiled at -O2 due to undefined
  17 // behavior in __tree. See https://llvm.org/PR28469
  18
  19 #include <functional>
  20 #include <map>
  21
  22 void dummy() {}
  23
  24 struct F {
  25     std::map<int, std::function<void()> > m;
  26     F() { m[42] = &dummy; }
  27 };
  28
  29 int main(int, char**) {
  30     F f;
  31     f = F();
  32
  33   return 0;
  34 }