(gdb) bt
#0  0x00007f6605886cd5 in hashnocase (s=0x5604ab50c190 "sky130_fd_sc_hd__diode_2", hashsize=1000) at hash.c:145
#1  0x00007f6605886eb6 in HashIntLookup (s=0x5604ab50c190 "sky130_fd_sc_hd__diode_2", i=1, dict=0x7f66058e6490 <cell_dict>)
    at hash.c:198
#2  0x00007f660588a8e8 in LookupCellFile (s=0x5604ab50c190 "sky130_fd_sc_hd__diode_2", f=1) at objlist.c:311
#3  0x00007f66058a18f6 in PropertyMatch (ob1=0x56047a3709b0, ob2=0x5604ab50bc10, do_print=0, do_list=0, retval=0x7ffdbc0b6328)
    at netcmp.c:5272
#4  0x00007f66058a23a0 in PropertyCheck (EC=0x5604731c14e0, do_print=0, do_list=0, rval=0x7ffdbc0b6328) at netcmp.c:5553
#5  0x00007f66058a2644 in VerifyMatching () at netcmp.c:5620
#6  0x00007f66058a31f9 in ResolveAutomorphisms () at netcmp.c:5944
#7  0x00007f66058cef33 in _netcmp_run (clientData=0x0, interp=0x56046a6429c0, objc=2, objv=0x56046a650828) at tclnetgen.c:2436
#8  0x00007f6606468777 in TclNRRunCallbacks () from /lib/x86_64-linux-gnu/libtcl8.6.so
#9  0x00007f6606469b6f in ?? () from /lib/x86_64-linux-gnu/libtcl8.6.so
#10 0x00007f6606522bb8 in Tcl_FSEvalFileEx () from /lib/x86_64-linux-gnu/libtcl8.6.so
#11 0x00007f6606521517 in Tcl_EvalFile () from /lib/x86_64-linux-gnu/libtcl8.6.so
#12 0x00007f660652a72e in Tcl_SourceRCFile () from /lib/x86_64-linux-gnu/libtcl8.6.so
#13 0x00007f660652ac7d in Tcl_MainEx () from /lib/x86_64-linux-gnu/libtcl8.6.so
#14 0x0000560468cea264 in main (argc=9, argv=0x7ffdbc0b6a48) at netgenexec.c:82