http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50312

Meador Inge <meadori at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |meadori at gmail dot com

--- Comment #1 from Meador Inge <meadori at gmail dot com> 2011-09-08 02:12:40 
UTC ---
This looks fixed in the HEAD revision (GCC 4.7):

[meadori@motherbrain gcc]$ ../../install/bin/i686-pc-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=../../install/bin/i686-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/home/meadori/code/gnu/install/libexec/gcc/i686-pc-linux-gnu/4.7.0/lto-wrapper
Target: i686-pc-linux-gnu
Configured with: ../../src/gcc/configure --host=i686-pc-linux-gnu
--build=i686-pc-linux-gnu --target=i686-pc-linux-gnu
--prefix=/home/meadori/code/gnu/install/ --enable-languages=c,c++
Thread model: posix
gcc version 4.7.0 20110903 (experimental) (GCC) 
[meadori@motherbrain gcc]$ cat test.cpp
#include <cstddef>
#ifdef BUG
template <typename T=int>
#define EXTRA <>
#else
#define EXTRA
#endif
struct foo {
   int bar;
   enum { END = offsetof(foo, bar) };
};
foo EXTRA a;
[meadori@motherbrain gcc]$ ../../install/bin/i686-pc-linux-gnu-gcc -DBUG
test.cpp
test.cpp: In instantiation of ‘struct foo<>’:
test.cpp:12:11:   required from here
test.cpp:10:9: error: invalid use of incomplete type ‘struct foo<>’
test.cpp:8:8: error: declaration of ‘struct foo<>’

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