ensure enum constants resolved inside enum class

EA-83687 - assert: PsiEnumConstantImpl.resolveMethodGenerics

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/redundantCast/CastInsideLambdaReturnExpressionPassedToEnumConstant.java

@@ -0,0 +1,14 @@
+import java.util.function.Function;
+
+interface Demo {
+
+  enum X {
+
+    A( key -> (<warning descr="Casting 'key.toString()' to 'String' is redundant">String</warning>) key.toString());
+
+    X(Function<String, Object> function) {
+      // ...
+    }
+  }
+
+}