# HG changeset patch
# User sadayapalam
# Date 1447933746 -19800
# Node ID 9b8030e8e0d9b1d198cc2e4b1bee0ddf576398e7
# Parent  66f0ce11ae22dbe9b733ca58060d37354fd777b3
8143217: javac throws NPE when printing diagnostics for Lambda expressions
Summary: Fix compiler crash when -XDdumpLambdaToMethodStats option is in effect.
Reviewed-by: mcimadamore

diff -r 66f0ce11ae22 -r 9b8030e8e0d9 langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/comp/LambdaToMethod.java
--- a/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/comp/LambdaToMethod.java	Wed Nov 18 16:37:12 2015 +0530
+++ b/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/comp/LambdaToMethod.java	Thu Nov 19 17:19:06 2015 +0530
@@ -1379,9 +1379,6 @@
             List<Frame> prevStack = frameStack;
             try {
                 LambdaTranslationContext context = new LambdaTranslationContext(tree);
-                if (dumpLambdaToMethodStats) {
-                    log.note(tree, statKey, context.needsAltMetafactory(), context.translatedSym);
-                }
                 frameStack = frameStack.prepend(new Frame(tree));
                 for (JCVariableDecl param : tree.params) {
                     context.addSymbol(param.sym, PARAM);
@@ -1390,6 +1387,9 @@
                 contextMap.put(tree, context);
                 super.visitLambda(tree);
                 context.complete();
+                if (dumpLambdaToMethodStats) {
+                    log.note(tree, statKey, context.needsAltMetafactory(), context.translatedSym);
+                }
                 return context;
             }
             finally {
diff -r 66f0ce11ae22 -r 9b8030e8e0d9 langtools/test/tools/javac/lambda/XDdumpLambdaToMethodStats.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/test/tools/javac/lambda/XDdumpLambdaToMethodStats.java	Thu Nov 19 17:19:06 2015 +0530
@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8143217
+ * @summary javac throws NPE when printing diagnostics for Lambda expressions
+ * @compile XDdumpLambdaToMethodStats.java -XDdumpLambdaToMethodStats
+ *
+ */
+
+/*
+ * Note: No golden file since the crash is reproducible only when raw
+ *       diagnostics are not in effect.
+*/
+
+public class XDdumpLambdaToMethodStats {
+    public static void main(String... a) {
+        new XDdumpLambdaToMethodStats().run();
+    }
+
+    public void run() {
+        printHash(this::m);
+        printHash(XDdumpLambdaToMethodStats::sm);
+        printHash(() -> { o = new Object(); });
+        printHash(() -> { s = new Object(); });
+    }
+
+    private void printHash(Runnable function) {
+        System.out.println(function + "; hash=" + function.hashCode());
+    }
+
+    private static void sm() {
+    }
+
+    private void m() {
+    }
+
+    private Object o;
+    private static Object s;
+}