GDB crash while stepping into function.

        * infrun.c (handle_inferior_event): Refetch the current frame
        after handling what.main_action, in case that pointer became
        dangling.

Author: Joel Brobecker

gdb/ChangeLog

@@ -1,3 +1,10 @@
+2010-01-09  Joel Brobecker  <[email protected]>
+
+	GDB crash while stepping into function.
+	* infrun.c (handle_inferior_event): Refetch the current frame
+	after handling what.main_action, in case that pointer became
+	dangling.
+
 2010-01-09  Joel Brobecker  <[email protected]>
 
 	Fix build failure of solaris-hosted cross debuggers.

gdb/infrun.c

@@ -4066,6 +4066,11 @@ infrun: not switching back to stepped thread, it has vanished\n");
       return;
     }
 
+  /* Re-fetch current thread's frame in case the code above caused
+     the frame cache to be re-initialized, making our FRAME variable
+     a dangling pointer.  */
+  frame = get_current_frame ();
+
   /* If stepping through a line, keep going if still within it.
 
      Note that step_range_end is the address of the first instruction