bin/49979: gdb does not work properly on NetBSD-6.1.1/i386

[darrenr%netbsd.org@localhost]

>Number:         49979
>Category:       bin
>Synopsis:       gdb does not work properly on NetBSD-6.1.1/i386
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Jun 16 12:00:00 +0000 2015
>Originator:     Darren Reed
>Release:        NetBSD 6.1_STABLE
>Organization:
	
>Environment:
Architecture: x86_64
Machine: amd64
>Description:
Whilst using gdb to step through a problem and debug an application,
it randomly stops working. e.g.:
(gdb) run -O -d -r test.cap ip
Starting program: /home/darrenr/tcpdump-4.7.4/tcpdump -O -d -r test.cap ip
reading from file test.cap, link-type EN10MB (Ethernet)

Breakpoint 1, flatten_bpfprog (start=0xbfbfebe4) at ./optimize.c:2276
2276            flen = start->bf_len;
(gdb) n
2277            for (slen = 0, fp = start->bf_insns; flen > 0; flen--, fp++)
(gdb)
2278                    slen += BPFX_WORDS(fp->code);
(gdb)
0x081d17f3 in ?? ()
netbsd: {790} file tcpdump
tcpdump: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), statically linked, for NetBSD 6.1.1, not stripped
>How-To-Repeat:
Use gdb to debug program.
>Fix: