Fix bug reported by Thomas Petazzoni : See: http://sourceware.org/ml/crossgcc/2009-05/msg00055.html https://bugzilla.redhat.com/show_bug.cgi?id=436037 Fix from: http://cvs.fedoraproject.org/viewvc/devel/gdb/gdb-6.8-bz436037-reg-no-longer-active.patch?revision=1.1 --- gdb/valops.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) --- a/gdb/valops.c +++ b/gdb/valops.c @@ -675,10 +675,18 @@ struct frame_info *frame; int value_reg; - /* Figure out which frame this is in currently. */ - frame = frame_find_by_id (VALUE_FRAME_ID (toval)); value_reg = VALUE_REGNUM (toval); + /* Figure out which frame this is in currently. */ + frame = frame_find_by_id (VALUE_FRAME_ID (toval)); + /* "set $reg+=1" should work on programs with no debug info, + but frame_find_by_id returns NULL here (RH bug 436037). + Use current frame, it represents CPU state in this case. + If frame_find_by_id is changed to do it internally + (it is contemplated there), remove this. */ + if (!frame) + frame = get_current_frame (); + /* Probably never happens. */ if (!frame) error (_("Value being assigned to is no longer active."));