Hi All,
This patch fixes the problem shown in the session below. The fix was  
originally created by Pedro a few years ago. I have updated it with the  
current code and regtested it. Is it OK?


(gdb) set debug expression 1
(gdb) p +1
Dump of expression @ 0x8840908, before conversion to prefix form:
	Language c, 5 elements, 16 bytes each.
	Index                Opcode         Hex Value  String Value
	    0               OP_LONG  40  (...............
	    1   <unknown 142879800>  142879800  8,..............
	    2             BINOP_ADD  1  ................
	    3               OP_LONG  40  (...............
	    4             UNOP_PLUS  70  F...............
Dump of expression @ 0x8840908, after conversion to prefix form:
Expression: `Invalid expression

Regards,
Abid

gdb:

2013-02-12  Pedro Alves  <palves@redhat.com>
	    Hafiz Abid Qadeer  <abidh@codesourcery.com>

	* c-lang.c (c_op_print_tab): Add entry for UNOP_PLUS.