The following code fails to compile:

#include <memory>

int main()
{
  int x1;
  [e = std::make_shared <int> (), x1]() {};
}

saying:
/tmp/gcc-explorer-compiler116515-85-117auiu/example.cpp: In function 'int main()':
6 : error: 'x1' was not declared in this scope
[e = std::make_shared <int> (), x1]() {};
^~
6 : error: redeclaration of '<typeprefixerror>x1'
5 : note: previous declaration 'int x1'
int x1;
^~
Compilation failed

(tested on gcc.godbolt.org, using gcc-6.1 -std=c++14)