Re: internal-error: insert_step_resume_breakpoint_at_sal

[Nick Roberts <nickrob@snap.net.nz>]

 > Tracking down these sorts of bugs is really important - it makes the 
 > difference between a toy and a real debugger, and I think your efforts 
 > have paid off :-)
 > 
 > With the log you provided I've been able to identify one bug - 
 > back-to-back signals (where the inferior was receiving the next signal 
 > just as the previous handler returned) would lead to a panic.
 > 
 > I'm about to commit a testcase and fix.

With todays cvs (GNU gdb 6.3.50.20050126-cvs) I no longer get an internal
error but everything hangs instead. I presume that it is GDB hanging and
not Emacs, as Emacs does not hang at this place when its not running under
debug (I'm only splitting a window).

However, I don't know how to get a backtrace as sending SIGINT (actually
SIGSTOP with Emacs) interrupts the bottom level process (Emacs in this
case). I can then interrupt the GDB being debugged, but presumably by then
things have changed.

Nick