https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115942
--- Comment #4 from Manuel Lauss <manuel.lauss at googlemail dot com> --- (In reply to Andrew Pinski from comment #1) > The .o file for LTO is not good at all. > > Please attach the original preprocessed sources? > > See > https://gcc.gnu.org/wiki/ > A_guide_to_testcase_reduction?highlight=%28reducing%29#Reducing_LTO_bugs if > you can't attach them because of copyright, etc. Thanks, I'll try these steps. The source is free, you can grab it here: https://github.com/mlauss2/TheForceEngine.git branch "test1-imguifiledialog" (master doesn't trigger it).