Conditional Local Functions are considered unused

using System.Diagnostics;

public class C {
    public void M() {
        local();
        
        [Conditional("DEBUG")]
        static void local() {} // Warning: unused local function
    }
}

This reproes when compiling for release mode.

[RikkiGibson]

(Hope I’m not causing any inconvenience while trying to make mini-contributions 😄 )

Absolutely not, we’re glad you’re here.

[RikkiGibson]

I think the fix to this bug is to ensure that the appropriate analysis pass adds the local function to the set of used local functions, regardless of the presence of any ConditionalAttribute, etc.