The output looks like: 0x8048410 <main+a>: push %ebp but an attempt to use <main+a> in an expression will fail. It should instead display decimal offsets vis: 0x8048410 <main+10>: push %ebp the alternative, to add hex prefixes would burn additional real estate :-( 0x8048410 <main+0xA>: push %ebp
This appears to have been changed as the OP requested as of at least 12.1. I believe this bug can be closed.