clang/test/Analysis/stackaddrleak.cpp

   1 // RUN: %clang_analyze_cc1 -analyzer-checker=core -verify %s
   2
   3 using size_t = decltype(sizeof(int));
   4 void *operator new(size_t, void *p) { return p; }
   5
   6 struct myfunction {
   7   union storage_t {
   8     char buffer[100];
   9     size_t max_align;
  10   } storage;
  11
  12   template <typename Func> myfunction(Func fn) {
  13     new (&storage.buffer) Func(fn);
  14   }
  15   void operator()();
  16 };
  17
  18 myfunction create_func() {
  19   int n;
  20   auto c = [&n] {};
  21   return c; // expected-warning {{Address of stack memory associated with local variable 'n' is still referred to by a temporary object on the stack upon returning to the caller.  This will be a dangling reference}}
  22 }
  23 void gh_66221() {
  24   create_func()();
  25 }