Here's the backtrace from gdb.
```(gdb) bt
#0 0x00...
# verification-bem
Mitch Bailey
07/13/2021, 4:18 PMHere's the backtrace from gdb.
Copy code
(gdb) bt
#0 0x00007ffff6ec67b1 in __strlen_sse2_pminub () from /lib64/libc.so.6
#1 0x00007fffede1ce41 in Tcl_Strdup (s=0x1 <Address 0x1 out of bounds>) at tclnetgen.c:4309
#2 0x00007fffeddf678c in CopyProperties (obj_to=0x1738e510, obj_from=0xc1940a0) at netgen.c:2503
#3 0x00007fffeddd4718 in CopyObjList (oldlist=0xc08e690, doforall=1 '\001') at objlist.c:972
#4 0x00007fffeddfc9bc in flattenInstancesOf (name=0xb38da90 "sky130_fd_io__gpiov2_obpredrvr", fnum=1,
instance=0xc095130 "sky130_fd_io__gpiov2_pupredrvr_strong_nd2") at flatten.c:364
#5 0x00007fffeddff2fa in PrematchLists (name1=0xfe1aa60 "sky130_fd_io__gpiov2_obpredrvr", file1=0,
name2=0xb38da90 "sky130_fd_io__gpiov2_obpredrvr", file2=1) at flatten.c:1601
#6 0x00007fffede16c33 in _netcmp_compare (clientData=0x0, interp=0x61cf70, objc=2, objv=0x621c48)
at tclnetgen.c:2195