http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52837 --- Comment #2 from Matt Godbolt <matt at godbolt dot org> 2012-04-02 22:51:14 UTC --- After a little more research, I've managed to get a 4-line reproduction case. (See attached). I also confirmed this code compiles without error on GCC4.5 and GCC4.6.