[tor-relays] exit relay "internal error"

[dns1983 at riseup.net]

Hello,

I have an exit relay on a debian remote vm. Yesterday, after I installed 
the last linux security update, I rebooted It, and than I had a problem 
with additional IPs, that were no more being assigned. In order to 
understand if it were a problem caused by the last upgrade I restored a 
previous backup, that I made on May with tar.

I didn't solved the problem restoring the backup, so I opened a ticket 
with my provider. Now they have fixed this issue, but my tor instance is 
going in loop. The log says:

...

Jun 18 13:33:31.000 [notice] Bootstrapped 0%: Starting
Jun 18 13:33:32.000 [notice] Starting with guard context "default"

============================================================ T= 1560854012
INTERNAL ERROR: Raw assertion failed at ../src/lib/ctime/di_ops.c:179: ! 
old_val/usr/bin/tor(dump_stack_symbols_to_error_fds+0x33)[0x55a17b410943]
/usr/bin/tor(tor_raw_assertion_failed_msg_+0x86)[0x55a17b410fd6]
/usr/bin/tor(dimap_add_entry+0xa0)[0x55a17b411ba0]
/usr/bin/tor(construct_ntor_key_map+0x69)[0x55a17b357969]
/usr/bin/tor(server_onion_keys_new+0x4d)[0x55a17b39f4dd]
/usr/bin/tor(+0x66e27)[0x55a17b287e27]
/usr/bin/tor(threadpool_new+0x18b)[0x55a17b3b3f0b]
/usr/bin/tor(cpu_init+0x9d)[0x55a17b28828d]
/usr/bin/tor(run_tor_main_loop+0x136)[0x55a17b27a496]
/usr/bin/tor(tor_run_main+0x1215)[0x55a17b27b935]
/usr/bin/tor(tor_main+0x3a)[0x55a17b278a8a]
/usr/bin/tor(main+0x19)[0x55a17b278609]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf1)[0x7ffb901ba2e1]
/usr/bin/tor(_start+0x2a)[0x55a17b27865a]
Jun 18 13:33:33.000 [notice] Tor 0.3.5.8 opening log file.

...

What could be the problem?

thanks

Gigi