fixed incorrect constructor method reference

src/org/jetbrains/java/decompiler/main/ClassWriter.java

@@ -98,8 +98,8 @@ public class ClassWriter {
           buffer.append(ExprProcessor.getCastTypeName(new VarType(node.lambdaInformation.content_class_name, true)));
         }
 
-        buffer.append("::");
-        buffer.append(node.lambdaInformation.content_method_name);
+        buffer.append("::")
+          .append(CodeConstants.INIT_NAME.equals(node.lambdaInformation.content_method_name) ? "new" : node.lambdaInformation.content_method_name);
       }
       else {
         // lambda method

test/org/jetbrains/java/decompiler/SingleClassesTest.java

@@ -86,6 +86,7 @@ public class SingleClassesTest {
   @Test public void testJava9StringConcat() { doTest("java9/TestJava9StringConcat"); }
   @Test public void testMethodReferenceSameName() { doTest("pkg/TestMethodReferenceSameName"); }
   @Test public void testMethodReferenceLetterClass() { doTest("pkg/TestMethodReferenceLetterClass"); }
+  @Test public void testConstructorReference() { doTest("pkg/TestConstructorReference"); }
   @Test public void testMemberAnnotations() { doTest("pkg/TestMemberAnnotations"); }
   @Test public void testMoreAnnotations() { doTest("pkg/MoreAnnotations"); }
   @Test public void testTypeAnnotations() { doTest("pkg/TypeAnnotations"); }

testData/results/TestConstructorReference.dec

@@ -0,0 +1,16 @@
+public class TestConstructorReference {
+   void boo() {
+      Runnable aNew = TestConstructorReference::new;// 22
+   }// 23
+}
+
+class 'TestConstructorReference' {
+   method 'boo ()V' {
+      5      2
+      6      3
+   }
+}
+
+Lines mapping:
+22 <-> 3
+23 <-> 4

testData/src/pkg/TestConstructorReference.java

@@ -0,0 +1,24 @@
+/*
+ * Copyright 2000-2016 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+public class TestConstructorReference {
+  public TestConstructorReference() {
+  }
+
+  void boo() {
+    Runnable aNew = TestConstructorReference::new;
+  }
+}