Can't change tool output extension in a custom toolset

[izarif]

Premake version: last bleeding-edge version form github actions (55fc4b2 i think)
OS: Win11
Generator: gmake

Problem: If, in a custom toolset, you change the extension in the gettooloutputext function to something non-standart like .asm, then the objects argument in the gettoolflags function will be an empty string

Code is here (but it's not a reproducible example just a code of a toolset)
https://github.com/izarif/q3lcc-premake/blob/master/q3lcc.lua

Here i changed an extension
https://github.com/izarif/q3lcc-premake/blob/master/q3lcc.lua#L130

Here i got an empty objects string
https://github.com/izarif/q3lcc-premake/blob/master/q3lcc.lua#L141

I am using dev version of premake because in 5.0.0-beta8 version premake does not call gettoolflags function at all

Sorry for my bad English, can someone confirm the bug?

[izarif]

Oh i got it, files are added to the OBJECTS based on the filesets table

https://github.com/premake/premake-core/blob/master/modules/gmake/gmake_cpp.lua#L123

Can you add the ability to change filesets from a toolset?