On 21.03.2011 21:35, Ian Lance Taylor wrote: > Gunther Piez <gpiez@xxxxxx> writes: > >> I tried the gcc-4.6.0 release candidate and get an error during the >> final linking stage with -flto: >> >> lto1: internal compiler error: in lto_wpa_write_files, at lto/lto.c:1518 >> >> I would like to submit a bug report, but a preprocessed source at this >> stage is not available. How can I submit a useful bug report? > There are some notes on LTO here: > > http://gcc.gnu.org/wiki/A_guide_to_testcase_reduction > > Ian > I managed to extract a testcase and reduce it somewhat (from 50k lines down to ~300). I reported it at http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48246 .