IDEA-175677 Duplicate generic method suggestion when inheriting from a raw type

java/java-psi-impl/src/com/intellij/codeInsight/completion/scope/CompletionElement.java

@@ -16,13 +16,15 @@
 package com.intellij.codeInsight.completion.scope;
 
 import com.intellij.openapi.util.Comparing;
-import com.intellij.openapi.util.Pair;
+import com.intellij.openapi.util.Trinity;
 import com.intellij.psi.*;
 import com.intellij.psi.util.MethodSignature;
 import com.intellij.psi.util.MethodSignatureUtil;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
+import java.util.Arrays;
+
 public class CompletionElement{
   private final Object myElement;
   private final PsiSubstitutor mySubstitutor;
@@ -63,7 +65,9 @@ public class CompletionElement{
       return ((PsiPackage)myElement).getQualifiedName();
     }
     if(myElement instanceof PsiMethod){
-      return Pair.create(((PsiMethod)myElement).getSignature(mySubstitutor), myQualifierText);
+      return Trinity.create(((PsiMethod)myElement).getName(),
+                            Arrays.asList(MethodSignatureUtil.calcErasedParameterTypes(((PsiMethod)myElement).getSignature(mySubstitutor))),
+                            myQualifierText);
     }
     if (myElement instanceof PsiVariable) {
       return "#" + ((PsiVariable)myElement).getName();

java/java-tests/testData/codeInsight/completion/normal/DuplicateGenericMethodSuggestionWhenInheritingFromRawType.java

@@ -0,0 +1,15 @@
+interface I {
+    int indexOf(Enum<?> e);
+}
+abstract class C<T> implements I {
+    @Override
+    public int indexOf(Enum<?> e) {
+    }
+}
+
+
+class C2 extends C {
+    {
+        inde<caret>x
+    }
+}

java/java-tests/testSrc/com/intellij/java/codeInsight/completion/NormalCompletionTest.groovy

@@ -1785,4 +1785,10 @@ class Bar {
     doTest('<')
   }
 
+  void testDuplicateGenericMethodSuggestionWhenInheritingFromRawType() {
+    CodeInsightSettings.instance.AUTOINSERT_PAIR_BRACKET = false
+    configure()
+    assert myFixture.lookupElementStrings == ['indexOf']
+  }
+
 }