[Bug c++/57346] g++ prematurely rejects references to local variables that are not odr-uses from local classes inside templates

["msebor at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57346

Martin Sebor <msebor at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |rejects-valid
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2016-07-22
                 CC|                            |msebor at gcc dot gnu.org
     Ever confirmed|0                           |1
      Known to fail|                            |4.5.3, 4.8.3, 4.9.3, 5.3.0,
                   |                            |6.1.0, 7.0

--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed.  Both Clang 3.8 and EDG eccp 4.11 successfully compile the code. 
GCC apparently never has.

$ cat y.C && /build/gcc-trunk-git/gcc/xgcc -B /build/gcc-trunk-git/gcc -S -Wall
-Wextra -Wpedantic y.C
  template<typename T> int f() {
    T n = 0;
    struct X { int get() { return n; } } x;
    return x.get();
  }

y.C: In member function ‘int f()::X::get()’:
y.C:3:35: error: use of local variable with automatic storage from containing
function
     struct X { int get() { return n; } } x;
                                   ^
y.C:2:7: note: ‘T n’ declared here
     T n = 0;
       ^