[Java] False positive on squid:S1905 when casting lambda to FunctionalInterface and assigning to non-FunctionalInterface supertype

[cba...@mimsoftware.com]

The following raises a false positive on S1905:

interface A {
   default void foo(){}
   default void bar(){}

   interface B extends A {
      void foo();
   }

   static void main() {
      A a = (B) ()->{};   //Triggers S1905 but A is not a valid target for the lambda
   }
}

Using SonarLint 3.2.1.2406

[Michael Gumowski]

Hello,

Thank you for your feedback. Nice catch. Ticket created to fix the issue: SONARJAVA-2667 

Cheers,

Michael

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Michael Gumowski | SonarSource

Software Developer, Language Team
https://www.sonarsource.com