https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99898
--- Comment #6 from Jan Hubicka <hubicka at ucw dot cz> --- > I only reacall backporting the streaming fixes early in gcc10 timeframe > (August) that was reason for the September bump. > Didn't we backport some new command line options/params breaking > streaming of optimization nodes as usual? We just few hours after the bump (in common.opt). So there is small range of revisions where one can produce incompatible objects. But I did not check lang specific/target specific options. Honza
