[LLVMbugs] [Bug 18780] New: Lambda inside lambda doesn't capture the variable

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=18780

            Bug ID: 18780
           Summary: Lambda inside lambda doesn't capture the variable
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++11
          Assignee: unassignedclangbugs at nondot.org
          Reporter: abyss.7 at gmail.com
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Here is a sample code:

#include <functional>
#include <iostream>

struct A {
  int a = 0;
  std::function<void()> on_run;
};

int main() {
  auto on_create = [](A* a) {
    std::cout << a << " " << a->a << std::endl;
    a->on_run = [&a]() {
      std::cout << a << " " << a->a << std::endl;
    };
  };

  A a;
  on_create(&a);
  a.a = 1;
  a.on_run();

  return 0;
}

The compilation command-line:

clang++ -std=c++11 test.cc -o test

Everything goes ok, except, that the possible output from `./test` is:

0x7fff6d180ac0 0
0x7fff6d180ac8 28930064

It looks like the second output has arbitrary values, since sometimes it even
segfaults.

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