Hello, 
well, ok, I will let you investigate as you can reproduce this issue. If you will need any other logs let me know. 

here is the sample of output:

Nov 13 13:10:07 dns-cache-2 kresd[16477]: {
Nov 13 13:10:07 dns-cache-2 kresd[16477]:     '',
Nov 13 13:10:07 dns-cache-2 kresd[16477]:     'H\003',
Nov 13 13:10:07 dns-cache-2 kresd[16477]:     'H',
Nov 13 13:10:07 dns-cache-2 kresd[16477]: }
Nov 13 13:10:07 dns-cache-2 kresd[16477]: total 0
Nov 13 13:10:07 dns-cache-2 kresd[16477]: drwxr-x--- 2 knot-resolver knot-resolver 60 Nov 13 13:07 .
Nov 13 13:10:07 dns-cache-2 kresd[16477]: drwxr-x--- 3 knot-resolver knot-resolver 60 Jul 19 17:52 ..
Nov 13 13:10:07 dns-cache-2 kresd[16477]: srwxr-xr-x 1 knot-resolver knot-resolver  0 Nov 13 13:07 1
Nov 13 13:10:17 dns-cache-2 kresd[16477]: {
Nov 13 13:10:17 dns-cache-2 kresd[16477]:     '',
Nov 13 13:10:17 dns-cache-2 kresd[16477]:     'H\003',
Nov 13 13:10:17 dns-cache-2 kresd[16477]:     'H',
Nov 13 13:10:17 dns-cache-2 kresd[16477]: }
Nov 13 13:10:17 dns-cache-2 kresd[16477]: total 0
Nov 13 13:10:17 dns-cache-2 kresd[16477]: drwxr-x--- 2 knot-resolver knot-resolver 60 Nov 13 13:07 .
Nov 13 13:10:17 dns-cache-2 kresd[16477]: drwxr-x--- 3 knot-resolver knot-resolver 60 Jul 19 17:52 ..
Nov 13 13:10:17 dns-cache-2 kresd[16477]: srwxr-xr-x 1 knot-resolver knot-resolver  0 Nov 13 13:07 1


pá 13. 11. 2020 v 13:08 odesílatel Vladimír Čunát <vladimir.cunat@nic.cz> napsal:
Thanks a lot!

There appears to be some issue with the map() function on 32-bit
platforms, introduced in 5.2.0 release.  We reproduced the problems and
are investigating them further.

--Vladimir