https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86469
--- Comment #14 from Jonny Grant <jg at jguk dot org> --- Hello Richard My archive of the original problem didn't show it. But when I tried to re-create I got the following. I'll try also make a small test case for this one while I have it. /usr/bin/x86_64-linux-gnu-ld: Dwarf Error: Could not find abbrev number 120.