When trying to create a configurable interface for...

# kotlin-toolchain

[James]

When trying to create a configurable interface for my plugin it complains it is a redeclaration, any ideas?

[joffrey]

Does it complain when you build with the CLI? Or just in the IDE?

[joffrey]

Also, just to eliminate the obvious, you don't have any other interface named the same way in the same package (possibly in dependencies), do you?

[James]

No interface named the same, nope, when I rename it in IntelliJ the same error appears.

It is fixed by invalidating cache.

The issue does not appear when building with the CLI.

[joffrey]

Glad that you found a solution! Does it come back from time to time or was it a one-timer? If you figured out some reproducing steps it would tremendously help investigate the cache corruption problem 🙏🏼

[James]

Yep, comes back from time to time, seemingly when I'm working in a module.yaml file and I save it with a formatting error, or randomly if I work in other modules and go back to the plugin module it re-appears. Only solution that has worked for me has been invalidating the cache.

[James]

Happening on TaskAction as well

[James]

After sync'ing the kotlin project, these are no longer present either

[James]

Back to conflicting after invalidating caches

[James]

message has been deleted

[James]

I quit IntelliJ and re-opened the same project again, and now these are gone again

[James]

After invalidating the cache the types are found again, but there still seem to be a conflict

[James]

Everything does seem to build though

[joffrey]

Thanks for the details! We'll check what's going on here. @utikeev maybe you could help out? 🙏🏼

[joffrey]

For tracking: KTC-5847 @Configurable and @TaskAction declarations sporadically considered as "redeclaration" or "conflicting overloads"

[joffrey]

Let's carry on the discussion over there if you have more info to share, so it doesn't get lost

[utikeev]

Thanks for the report! Just to clarify—it's 2026.2.2 as you've stated in one of the previous threads, right?

[James]

Correct