toolchain/49078: gdb does not work on gmpc

[Thomas Klausner <wiz%NetBSD.org@localhost>]

>Number:         49078
>Category:       toolchain
>Synopsis:       gdb does not work on gmpc
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    toolchain-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Aug 06 11:50:00 +0000 2014
>Originator:     Thomas Klausner
>Release:        NetBSD 6.99.49
>Organization:
Curiosity is the very basis of education and if you tell me that 
curiosity killed the cat, I say only that the cat died nobly.
- Arnold Edinborough
>Environment:
System: NetBSD yt 6.99.49 NetBSD 6.99.49 (KVOTHE) #71: Mon Aug 4 11:44:04 CEST 
2014 wiz@yt:/archive/foreign/src/sys/arch/amd64/compile/obj/KVOTHE amd64
Architecture: x86_64
Machine: amd64
>Description:
Running gdb on gmpc from audio/gmpc gives a weird warning:
Couldn't get registers: No such process.
and the process stops, its window doesn't refresh.
>How-To-Repeat:

# gdb gmpc
GNU gdb (GDB) 7.7.1
Copyright (C) 2014 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64--netbsd".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from gmpc...(no debugging symbols found)...done.
(gdb) r
Starting program: /usr/pkg/bin/gmpc

(gmpc:15755): Gtk-WARNING **: Attempting to add a widget with type GtkImage to 
a GtkButton, but as a GtkBin subclass a GtkButton can only contain one widget 
at a time; it already contains a widget of type GtkLabel

(gmpc:15755): Gtk-WARNING **: Attempting to add a widget with type GtkImage to 
a GtkButton, but as a GtkBin subclass a GtkButton can only contain one widget 
at a time; it already contains a widget of type GtkLabel

(gmpc:15755): Gtk-WARNING **: Attempting to add a widget with type GtkImage to 
a GtkButton, but as a GtkBin subclass a GtkButton can only contain one widget 
at a time; it already contains a widget of type GtkLabel

(gmpc:15755): Gtk-WARNING **: Attempting to add a widget with type GtkImage to 
a GtkButton, but as a GtkBin subclass a GtkButton can only contain one widget 
at a time; it already contains a widget of type GtkLabel
[New LWP 2]
Couldn't get registers: No such process.
(gdb) c
Continuing.
Couldn't get registers: No such process.
(gdb) c
Continuing.
Couldn't get registers: No such process.

>Fix:
Please.