fix new byte[]null in lookups

java/java-impl/src/com/intellij/codeInsight/lookup/PsiTypeLookupItem.java

@@ -226,7 +226,7 @@ public class PsiTypeLookupItem extends LookupItem {
 
     }
     if (myBracketsCount > 0) {
-      presentation.setTailText(StringUtil.repeat("[]", myBracketsCount) + presentation.getTailText(), true);
+      presentation.setTailText(StringUtil.repeat("[]", myBracketsCount) + StringUtil.notNullize(presentation.getTailText()), true);
     }
   }
 

java/java-tests/testData/codeInsight/completion/smartType/NewByteArray.java

@@ -0,0 +1,5 @@
+class A {
+  byte[] m() {
+    return new <caret>x;
+  }
+}

java/java-tests/testSrc/com/intellij/codeInsight/completion/SmartTypeCompletionTest.java

@@ -612,6 +612,13 @@ public class SmartTypeCompletionTest extends LightFixtureCompletionTestCase {
     assertEquals("[] (java.lang)", LookupElementPresentation.renderElement(myItems[1]).getTailText());
   }
 
+  public void testNewByteArray() {
+    configureByTestName();
+    assertStringItems("byte");
+    assertEquals("[]", LookupElementPresentation.renderElement(myItems[0]).getTailText());
+
+  }
+
   public void testInsideStringLiteral() throws Throwable { doAntiTest(); }
 
   public void testDefaultAnnoParam() throws Throwable { doTest(); }