bad code green: reject return type constraint if unchecked conversion was applied during applicability check and return type is type parameter

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/genericsHighlighting8/IDEA56754.java

@@ -1,5 +1,5 @@
 class Foo<T extends Enum> {
   public T bar(Class<? extends T> type, String str) {
-    <error descr="Incompatible types. Found: 'java.lang.Enum', required: 'T'">return Enum.valueOf(type, str);</error>
+    return Enum.valueOf(<error descr="'valueOf(java.lang.Class<T>, java.lang.String)' in 'java.lang.Enum' cannot be applied to '(java.lang.Class<capture<? extends T>>, java.lang.String)'">type</error>, str);
   }
 }

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

@@ -4,7 +4,7 @@ abstract class Group {
   }
 
   public <T extends Category> T get(Key<T> key) {
-    <error descr="Incompatible types. Found: 'Category', required: 'T'">return getCategory(key);</error>
+    return getCategory<error descr="'getCategory(Key<R>)' in 'Group' cannot be applied to '(Key<T>)'">(key)</error>;
   }
 
   public abstract <R extends Category<R>> R getCategory(Key<R> key);

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/graphInference/PrimitiveTypeInReturnConstraintWithUncheckedConversion.java

@@ -0,0 +1,12 @@
+import java.util.List;
+
+class Test {
+  <T> T foo(List<T> l) {
+    return l.get(0);
+  }
+
+  void m(List l){
+    <error descr="Incompatible types. Found: 'java.lang.Object', required: 'boolean'">boolean foo = foo(l);</error>
+    <error descr="Incompatible types. Found: 'java.lang.Object', required: 'java.lang.String'">String s = foo(l);</error>
+  }
+}