new inference: initial tests

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/genericsHighlighting8/IDEA57308.java

@@ -0,0 +1,13 @@
+class A<T> {}
+
+interface IA{
+    <T> void foo(A<? extends T[]> x);
+}
+interface IB{
+    <T> int foo(A<? extends T> x);
+}
+class C {
+    <<error descr="'foo(A<? extends T>)' in 'IB' clashes with 'foo(A<? extends T[]>)' in 'IA'; both methods have same erasure, yet neither overrides the other"></error><error descr="'foo(A<? extends T>)' in 'IB' clashes with 'foo(A<? extends T[]>)' in 'IA'; both methods have same erasure, yet neither overrides the other"></error>T extends IA & IB> void bar(T x, A<String[]> y){
+        <error descr="Incompatible types. Found: 'void', required: 'int'">int z = x.foo(y);</error>
+    }
+}