tsig-confgen dumps core

tsig-confgen from BIND master (6f576b2c) dumps core on CentOS 8:

$ gdb tsig-confgen
...
(gdb) continue 
Continuing.
warning: Loadable section ".note.gnu.property" outside of ELF segments
ddns-confgen.c:133: INSIST(0) failed, back trace
/lib64/libisc.so.1701(+0x2e5c3) [0x7ffff7b8c5c3]
/lib64/libisc.so.1701(isc_assertion_failed+0xa) [0x7ffff7b8c537]
/usr/sbin/tsig-confgen() [0x4014ed]
/lib64/libc.so.6(__libc_start_main+0xf3) [0x7ffff558c873]
/usr/sbin/tsig-confgen() [0x40125e]

Program received signal SIGABRT, Aborted.
0x00007ffff55a08df in raise () from /lib64/libc.so.6
Missing separate debuginfos, use: dnf debuginfo-install libgcc-8.3.1-4.5.el8.x86_64
(gdb) thread apply all bt full

Thread 1 (Thread 0x7ffff7fe10c0 (LWP 4396)):
#0  0x00007ffff55a08df in raise () from /lib64/libc.so.6
No symbol table info available.
#1  0x00007ffff558acf5 in abort () from /lib64/libc.so.6
No symbol table info available.
#2  0x00007ffff7b8c53c in isc_assertion_failed (file=file@entry=0x402794 "ddns-confgen.c", line=line@entry=133, type=type@entry=isc_assertiontype_insist, cond=cond@entry=0x402792 "0") at assertions.c:47
No locals.
#3  0x00000000004014ed in main (argc=1, argv=0x7fffffffd998) at ddns-confgen.c:133
        result = <optimized out>
        show_final_mem = false
        quiet = false
        key_txtbuffer = {magic = 0, base = 0x0, length = 255, used = 0, current = 4096, active = 0, link = {prev = 0x1020, next = 0x0}, mctx = 0x0, autore = 221}
        key_txtsecret = "\000\000\000\000\000\000\000\000\067\351^\365\377\177\000\000 \020\000\000\000\000\000\000\020\000\000\000\000\000\000\000\243\220x\364\377\177\000\000\230\331\377\377\377\177\000\000\250\331\377\377\377\177\000\000\256$_\365\377\177\000\000\243\220x\364\377\177\000\000\243\220x\364\377\177\000\000\000\000\000\000\000\000\000\000n\fw\364\377\177\000\000\000\020\000\000\000\000\000\000\000\020", '\000' <repeats 63 times>, "\020\000\000\000\000\000\000\377", '\000' <repeats 31 times>...
        mctx = 0x0
        keyname = 0x0
        zone = 0x0
        self_domain = 0x0
        keybuf = 0x0
        alg = 163 '\243'
        algname = <optimized out>
        keysize = 256
        len = 0
        ch = <optimized out>