Index: gdb-6.8.50.20090803/gdb/valops.c

===================================================================

--- gdb-6.8.50.20090803.orig/gdb/valops.c	2009-08-04 06:30:45.000000000 +0200

+++ gdb-6.8.50.20090803/gdb/valops.c	2009-08-04 06:33:05.000000000 +0200

@@ -926,10 +926,18 @@ value_assign (struct value *toval, struc

 	struct gdbarch *gdbarch;

 	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 	  error (_("Value being assigned to is no longer active."));