[bug]: registering aliases can cause minetest crash when something is searched in i3

[wsor4035]

Describe the bug
trying to search for anything crashes minetest. see mt-mods/unifieddyes#7

To Reproduce
use a game without the dye mod
add

minetest.register_alias("dye:light_red",  "dye:pink")
minetest.register_alias("dye:medium_orange", "dye:brown")

enable mod, try to search something, watch the game crash

Additional context

• Mod version? Release and git
• Engine version? 5.5.0
• LuaJIT enabled? yes
• Operating system? windows
• Did you try to disable other mods except i3? no, not needed.

error stack

AsyncErr: Lua: Runtime error from mod 'i3' in callback on_playerReceiveFields(): (load):104: bad argument #2 to 'translate' (string expected, got nil)
stack traceback:
	[C]: in function 'translate'
	(load):104: in function 'search'
	(load):330: in function 'rcp_fields'
	(load):445: in function <(load):411>
	...st\minetest-5.5.0-win64\bin\..\builtin\game\register.lua:425: in function <...st\minetest-5.5.0-win64\bin\..\builtin\game\register.lua:409>

[kilbith]

I can't seem to reproduce it. More information needed.

Is unifieddyes enabled?

[wsor4035]

minimally reproducible example use void game + i3 + unifieddyes commit (https://github.com/mt-mods/unifieddyes/tree/ed895734f29c4fb214a82bb3bb2ac123b77fdd2e) (pre me adding a work around), then apply the latest commit and notice it doesnt crash anymore

[kilbith]

Indeed that happens when unifieddyes is enabled, you should have mentionned that.

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