The autotester hasn't revealed this cause it still uses the old g++4.2 on OSX.Apple switched to Clang just recently."gcc" on OS X 10.7, which I am using, defaults to using clang. So I am using clang on a regular basis, and have not seen issues.
It's a really small corner case. Here's a fix: https://github.com/D-Programming-Language/dmd/pull/668
