http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52288
--- Comment #3 from Ivan Godard <igodard at pacbell dot net> 2012-02-17 00:00:48 UTC --- As lambdas get used more you will get this kind of report a lot. I suggest you head off a lot of nuisance by having any lambda/lambda type comparisons emit a "Note: each lambda is it own unique type".