Re: infrun.c:2642: internal-error: insert_step_resume_breakpoint_at_sal:Assertion `step_resume_breakpoint == NULL' failed.

[Andrew Cagney <ac131313 at redhat dot com>]

Andreas Schwab wrote:
> I'm getting this assertion failure on ia64-linux when stepping after a
> breakpoint with a signal also being delivered.  Both calls to
> insert_step_resume_breakpoint_at_sal are coming from the two calls to
> insert_step_resume_breakpoint_at_frame in handle_inferior_event.  In both
> calls the actual address where the breakpoint is to be set is the same.  I
> haven't been able to come up with a small test case, this happens while
> debugging Emacs.

The sig* tests check this edge case.

For the other architectures I investigated, it was tracked down to 
kernel bugs.  For instance, ptrace(STEP,SIGNAL) was implemented as 
ptrace(CONT,SIGNAL).  Suggest looking upstream, we've (Red Hat) have 
been pushing fixes for other key architectures ;-)

Andrew