overload resolution for exact method references: ensure param types are equal in case non-generic methods

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

@@ -0,0 +1,29 @@
+interface I1 {
+  int i1(int i);
+}
+
+interface I2 {
+  Integer i2(Integer i);
+}
+
+interface I3 {
+  Integer i3(int i);
+}
+
+class Test {
+
+  private void <warning descr="Private method 'm(I1)' is never used">m</warning>(I1 i1) {System.out.println(i1);}
+  private void <warning descr="Private method 'm(I2)' is never used">m</warning>(I2 i2) {System.out.println(i2);}
+
+  private void m1(I1 i1) {System.out.println(i1);}
+  private void <warning descr="Private method 'm1(I3)' is never used">m1</warning>(I3 i2) {System.out.println(i2);}
+
+  void test() {
+    m <error descr="Ambiguous method call: both 'Test.m(I1)' and 'Test.m(I2)' match">(this::bar)</error>;
+    m1(this::bar);
+  }
+
+  int bar(int i) {
+    return i;
+  }
+}