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issues with chemtool from 2019Q2

Hi all,
Being a chemist, I rather often need to draw molecules. Usually the needed tools are only available for Windows, but there is one professional tool that provides binaries as .deb and .rpm
Now, on NetBSD there's an old, but still functional, chemtool.
A strange issue, though. Launching chemtool produces a core dump

pin@mybox $ chemtool
Memory fault (core dumped)

Trying to debug, but the binary seems to be compiled without debug symbols, as I get

pin@mybox $ gdb chemtool                                                                         
GNU gdb (GDB) 7.12
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64--netbsd".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
Find the GDB manual and other documentation resources online at:
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from chemtool...(no debugging symbols found)...done.

Despite this launching the program from gdb with

(gdb) run

works and the program is functional.

Any suggestions on how to go about launching the program normally?

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