[ns] NS segfault on RH7.0

[Sharad Agarwal <sagarwal@CS.Berkeley.EDU>]

I am having a seg fault with NS (no matter what simulation script I run)
on a RedHat7.0 system, Linux-2.4 kernel. I have tried the latest otcl
snapshot and the latest tclcl snapshot and the latest ns snapshot (and
all permutations of the release versions of these packages). The problem
persists. The problem is not present with the same packages on older
linux machines.

Has anyone else experienced this? Is there a fix?

Thanks,
Sharad.


>/tmp/ns-2-snapshot-20001113/ns test.tcl
Segmentation fault

>gdb /tmp/ns-2-snapshot-20001113/ns
Copyright 2000 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you
are
welcome to change it and/or distribute copies of it under certain
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for
details.
This GDB was configured as "i386-redhat-linux"...
(gdb) dir /home/sharada/otcl-snapshot-20001113/
Source directories searched:
/home/sharada/otcl-snapshot-20001113:$cdir:$cwd
(gdb) run test.tcl
Starting program: /tmp/ns-2-snapshot-20001113/ns test.tcl

Program received signal SIGSEGV, Segmentation fault.
OTclOInstVarOne (obj=0x826a910, in=0x8264088, frameName=0x81fd04b "1", 
    varName=0x82edb98 "id", localName=0x82edb98 "id", flags=0) at
otcl.c:1439
1439	  	CallFrame* saved = iPtr->varFramePtr->callerVarPtr;
Current language:  auto; currently c
(gdb) bt
#0  OTclOInstVarOne (obj=0x826a910, in=0x8264088, frameName=0x81fd04b
"1", 
    varName=0x82edb98 "id", localName=0x82edb98 "id", flags=0) at
otcl.c:1439
#1  0x8129b80 in OTclOInstVarMethod (cd=0x826a910, in=0x8264088, argc=5, 
    argv=0xbfffe050) at otcl.c:1471
#2  0x8127faa in OTclDispatch (cd=0x826a910, in=0x8264088, argc=3, 
    argv=0xbfffe0a0) at otcl.c:421
#3  0x400ed869 in TclInvokeStringCommand () from /usr/lib/libtcl8.3.so
#4  0x40109f7b in TclExecuteByteCode () from /usr/lib/libtcl8.3.so
#5  0x400ee34e in Tcl_EvalObjEx () from /usr/lib/libtcl8.3.so
#6  0x4012fe5e in TclObjInterpProc () from /usr/lib/libtcl8.3.so
#7  0x4012f9db in TclProcInterpProc () from /usr/lib/libtcl8.3.so
#8  0x8127faa in OTclDispatch (cd=0x826a910, in=0x8264088, argc=2, 
    argv=0xbfffe810) at otcl.c:421
#9  0x400ed869 in TclInvokeStringCommand () from /usr/lib/libtcl8.3.so
#10 0x40109f7b in TclExecuteByteCode () from /usr/lib/libtcl8.3.so
#11 0x400ee34e in Tcl_EvalObjEx () from /usr/lib/libtcl8.3.so
#12 0x4012fe5e in TclObjInterpProc () from /usr/lib/libtcl8.3.so
#13 0x401282e1 in EvalObjv () from /usr/lib/libtcl8.3.so
#14 0x401289eb in Tcl_EvalEx () from /usr/lib/libtcl8.3.so
#15 0x40128637 in Tcl_EvalTokens () from /usr/lib/libtcl8.3.so
#16 0x40128994 in Tcl_EvalEx () from /usr/lib/libtcl8.3.so
#17 0x40128c65 in Tcl_Eval () from /usr/lib/libtcl8.3.so
#18 0x400efa4b in Tcl_GlobalEval () from /usr/lib/libtcl8.3.so
#19 0x81256a3 in Tcl::eval () at gen/ptypes.cc:299
#20 0x812566e in Tcl::evalc () at gen/ptypes.cc:299
#21 0x8126099 in EmbeddedTcl::load () at gen/ptypes.cc:299
#22 0x804adea in Tcl_AppInit (interp=0x8264088) at tclAppInit.cc:172
#23 0x401223ca in Tcl_Main () from /usr/lib/libtcl8.3.so
#24 0x804acb5 in main (argc=2, argv=0xbffff914) at tclAppInit.cc:60
#25 0x402cdb65 in __libc_start_main (main=0x804ac9c <main>, argc=2, 
    ubp_av=0xbffff914, init=0x804a270 <_init>, fini=0x816d08c <_fini>, 
    rtld_fini=0x4000df24 <_dl_fini>, stack_end=0xbffff90c)
    at ../sysdeps/generic/libc-start.c:111