Comment 13 for bug 469005

Seen in Ubuntu 12.04 32-bit using GDB (Ubuntu/Linaro 7.4-2012.04-0ubuntu2). Running gdb inside Emacs, using the 'tty' command to set the inferior tty to /dev/pts/1, I get the "warning: GDB: Failed to set controlling terminal: Operation not permitted" message on the target terminal.