Woodcutting + "supsiciously large number of objects" crash

[BobFred7]

2020-02-20 01:21:02: ERROR[Server]: suspiciously large amount of objects detected: 76 in (1356,0,-1369); removing all of them.
2020-02-20 01:21:02: ERROR[Server]: suspiciously large amount of objects detected: 86 in (1357,0,-1368); removing all of them.
2020-02-20 01:21:44: ERROR[Main]: ServerError: AsyncErr: environment_Step: Runtime error from mod 'woodcutting' in callback environment_Step(): /data/world//worldmods/woodcutting/init.lua:124: attempt to concatenate a nil value
2020-02-20 01:21:44: ERROR[Main]: stack traceback:
2020-02-20 01:21:44: ERROR[Main]: 	/data/world//worldmods/woodcutting/init.lua:124: in function 'get_delay_time'
2020-02-20 01:21:44: ERROR[Main]: 	/data/world//worldmods/woodcutting/init.lua:188: in function 'func'
2020-02-20 01:21:44: ERROR[Main]: 	/usr/local/share/minetest/builtin/common/after.lua:20: in function 'globalstep'
2020-02-20 01:21:44: ERROR[Main]: 	...//worldmods/monitoring/monitoring/builtin/globalstep.lua:29: in function <...//worldmods/monitoring/monitoring/builtin/globalstep.lua:20>
2020-02-20 01:21:44: ERROR[Main]: 	/usr/local/share/minetest/builtin/game/register.lua:429: in function </usr/local/share/minetest/builtin/game/register.lua:413>
2020-02-20 01:21:44: ERROR[Main]: stack traceback:

Woodcutting's line 124 "attempt to concatenate a nil value" error again... 😠 😕

[BuckarooBanzay]

added more (nil-checked) logging, the supsiciously large number of objects message has nothing to do with the crash...

[BuckarooBanzay]

closing this, if this makes more problems i'm open for alternative woodcutting mods...