http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57653
--- Comment #12 from Manuel López-Ibáñez <manu at gcc dot gnu.org> --- (In reply to Allan McRae from comment #11) > Created attachment 30345 [details] > log of gdb session > > Here is the log from my gdb session. > > Arch builds with no patches, just a could of small sed lines that should not > affect this. See our build script (plain bash): > https://projects.archlinux.org/svntogit/packages.git/tree/trunk/ > PKGBUILD?h=packages/gcc Does it do a full bootstrap? My gdb session looks more optimized than yours. Perhaps it is a bug in the host compiler? My version also does not ever execute this: Breakpoint 1, linemap_add (set=0x7ffff7ff9000, reason=LC_ENTER, sysp=2, to_file=0x140e270 "/usr/include/stdc-predef.h", to_line=1) at /build/gcc-git/src/gcc/libcpp/line-map.c:291 In fact, I don't have this file. manuel@gcc10:~$ cat /etc/debian_version 6.0.6 so the presence of the file may make a difference (unfortunately, I don't have root access to gcc10 to fake the file and test).