[Bug remote/19840] New: gdb crashes on reverse-stepi

["andi-bz at firstfloor dot org" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=19840

            Bug ID: 19840
           Summary: gdb crashes on reverse-stepi
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: remote
          Assignee: unassigned at sourceware dot org
          Reporter: andi-bz at firstfloor dot org
  Target Milestone: ---

I'm using gdb to do reverse debugging simics the simics gdbstub.

Always see

(gdb) target remote localhost:...
(gdb) reverse-stepi
../../gdb/target.c:602: internal-error: default_execution_direction:
to_execution_direction must be implemented for reverse async


The problem happens in the FC23 gdb 7.10 and current gdb master.

It does not happen with much older versions of gdb, like a gdb 7.7.1 from an
older fedora release, so it appears to be an regression.

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