Seems to be same problem as described in this post: dbg-cli-2-11-on-x86-64-systems-t1468.html?highlight=segmentation fault
System: x86_64 GNU/Linux
Distro: Ubuntu Dapper 6.06
Backtrace:

************************************************************
Program received signal SIGSEGV, Segmentation fault.
ensure_slashes (s=@0x532ac0, isbackslash=<value optimized out>,
addlastslash=<value optimized out>) at dbgbase_globals.cpp:509
509 s[p] = sl;
(gdb) bt
#0 ensure_slashes (s=@0x532ac0, isbackslash=<value optimized out>,
addlastslash=<value optimized out>) at dbgbase_globals.cpp:509
#1 0x000000000040f1d0 in filemapper::modified (this=0x56d680)
at dbgbase_globals.cpp:628
#2 0x0000000000404b65 in handler_set_mapurlroot (argc=<value optimized out>,
argv=<value optimized out>) at dbgbase_globals.h:452
#3 0x0000000000403763 in process_line (line=<value optimized out>)
at command.cpp:453
#4 0x0000000000408f8f in process_loop (port=0, execarg=0x0, cgihandler=0x0,
mode=-1, mapurlroot=0x0, maplocalroot=0x0, mapremoteroot=0x0)
at command.cpp:1740
#5 0x000000000040b70a in main (argc=1, argv=0x7fffffc14bf8) at main.cpp:290
************************************************************

Haven't tried the patch as referenced in the article above yet, as this seemed to be release specific. I searched through the forums, but couldn't find any other references to this problem. Is this a known issue? Are there anymore debug steps I should try? Thanks!

your backtrace is completely useless, yet.
please re-compile with optimizations turned off (-O0)

Whoops, here goes:

dbg>set mapurlroot http://localhost

Program received signal SIGSEGV, Segmentation fault.
0x00000000004110c1 in ensure_slashes (s=@0x54bc60, isbackslash=false,
addlastslash=true) at dbgbase_globals.cpp:509
509 s[p] = sl;
(gdb) bt
#0 0x00000000004110c1 in ensure_slashes (s=@0x54bc60, isbackslash=false,
addlastslash=true) at dbgbase_globals.cpp:509
#1 0x00000000004110e5 in filemapper::modified (this=0x54bc60)
at dbgbase_globals.cpp:628
#2 0x0000000000408b7a in filemapper::set_url_root (this=0x54bc60,
s=@0x7ffffffed110) at dbgbase_globals.h:452
#3 0x0000000000403f49 in handler_set_mapurlroot (argc=1, argv=0x57cc90)
at command.cpp:851
#4 0x0000000000405cc2 in process_command (st=ssNotStarted,
cmd_line=0x57cb60 "set") at command.cpp:453
#5 0x0000000000405db0 in process_line (line=0x57cb60 "set") at command.cpp:518
#6 0x0000000000406bac in process_loop (port=0, execarg=0x0, cgihandler=0x0,
mode=-1, mapurlroot=0x0, maplocalroot=0x0, mapremoteroot=0x0)
at command.cpp:1740
#7 0x000000000040e941 in main (argc=1, argv=0x7ffffffed618) at main.cpp:290

it's 2.13.1 code.
Please update to 2.15 available from sourceforge site.

Works now with the 2.15.1 code base. Thanks!