https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64111
Thiago Macieira <thiago at kde dot org> changed: What |Removed |Added ---------------------------------------------------------------------------- Attachment #34141|0 |1 is obsolete| | Attachment #34142|0 |1 is obsolete| | --- Comment #12 from Thiago Macieira <thiago at kde dot org> --- Created attachment 34143 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34143&action=edit Testcase with preprocessed source and Makefiles Here you go. I've included two sets of preprocessed sources, as the libstdc++ headers are different in each GCC version. However, the error happens with GCC 5 on both sets of preprocessed sources. The GCC 5 preprocessed output is for reference only.