[Bug c++/48577] "unexpected ast of kind unordered_expr" using isnan()

[jens.maurer at gmx dot net]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48577

--- Comment #1 from Jens Maurer <jens.maurer at gmx dot net> 2011-04-12 
16:39:03 UTC ---
It works with gcc 4.5.2, so it seems to be a 4.6 regression.