ICE in final linking stage with -flto

[Ian Lance Taylor]

Gunther Piez <gpiez@web.de> 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