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  1. #include <functional>
  2.  
  3.  
  4. std::function<void()> s_capture_void_int;
  5. void capture_void_int (const std::function<void(int)>& param)
  6. {
  7.     s_capture_void_int = [param]() {
  8.         param(1);
  9.     };
  10. }
  11. void capture_local_lambda()
  12. {
  13.     auto local_lambda = [](int) {
  14.     };
  15.     s_capture_void_int = [local_lambda]() {
  16.         local_lambda(1);
  17.     };
  18. }
  19.  
  20. int main() {
  21.     //Case 1: this works
  22.     auto func2 = [](int){};
  23.     {
  24.         std::function<void(int)> func2_fn(func2);
  25.         s_capture_void_int = [func2_fn]() { func2_fn(1); };
  26.     }
  27.     s_capture_void_int();
  28.  
  29.     //case 2: even this works.
  30.     capture_local_lambda();
  31.     s_capture_void_int();
  32.  
  33.     //case 3: but this fails.
  34.     auto func3 = [](int){};
  35.     {
  36.         std::function<void(int)> func3_fn(func3);
  37.         capture_void_int(func3_fn);
  38.     }
  39.     s_capture_void_int(); //<- it crashes here
  40. 	return 0;
  41. }
Success #stdin #stdout 0s 3472KB
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https://ideone.com/Hn5RUC
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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