Clashing trait methods

Reports classes which implement two or more traits that contain methods with same signatures.

The result of calling such methods might be unexpected.

The quick-fix adds an explicit overriding method.

Example:

  trait T1 {
      def foo() {}
  }

  trait T2 {
      def foo() {}
  }

  class X implements T1, T2 {}

  // T2.foo() will be called
  new X().foo()

After the quick-fix is applied:

  class X implements T1, T2 {
      @Override
      Object foo() {
          return T2.super.foo()
      }
  }

Locating this inspection

By ID

Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

ClashingTraitMethods

Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | Groovy | Potentially confusing code constructs

Suppressing Inspection

You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:

//noinspection ClashingTraitMethods

More detailed instructions as well as other ways and options that you have can be found in the product documentation:

IntelliJ IDEA 2025.2

Inspection Details
By default bundled with:	IntelliJ IDEA 2025.2, Qodana for JVM 2025.2,

Last modified: 18 September 2025