This is a followup on something that was discovered while reviewing a stabs patch: http://www.sourceware.org/ml/gdb-patches/2007-02/msg00139.html In particular, this is where we discovered this little typo: http://www.sourceware.org/ml/gdb-patches/2007-02/msg00368.html I confirm that I misanalyzed the second problem I mentioned in my original message, and that this is the source of the issue I was seeing: Breakpoint 1, pck.lock.set (x=Unrecognized 0-bit floating-point type. ) at pck.adb:11 Basically, the effect of the typo is that we forgot to update the type length of the other types in the same CV ring. Fixed thusly. 2007-02-28 Joel Brobecker * gdbtypes.c (replace_type): Fix typo that caused us to not update length of the types referenced by the new type CV ring. Tested on x86-linux, no regression. OK to apply? Thanks, -- Joel