http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53307
chesstr at hotmail dot com changed: What |Removed |Added ---------------------------------------------------------------------------- Attachment #27363|0 |1 is obsolete| | --- Comment #1 from chesstr at hotmail dot com 2012-05-10 17:16:47 UTC --- Created attachment 27366 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27366 better test case It turns out, if the length of parameter pack arg3s... is 0 this bug occurs, if it is not 0 then gcc compiles without any problem.