overload resolution: ensure cleanup both branches of conditional (IDEA-169142)

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/overloadResolution/ForceCleanupErrorsInConditionalWhenBothBranchesProduceError.java

@@ -0,0 +1,17 @@
+class Test {
+  interface A<<warning descr="Type parameter 'T' is never used">T</warning>> {}
+  interface B<<warning descr="Type parameter 'T' is never used">T</warning>> {}
+
+  static class BImpl<T> implements B<T> {
+    BImpl() {}
+  }
+
+  static class Main<T>  {
+    private void <warning descr="Private method 'supply(Test.A<T>)' is never used">supply</warning>(A<T> <warning descr="Parameter 'a' is never used">a</warning>) {}
+    private void supply(B<T> <warning descr="Parameter 'b' is never used">b</warning>) {}
+
+    public void test(boolean flag) {
+      supply(flag ? new BImpl<>() : new BImpl<>());
+    }
+  }
+}