8154180: Regression: stuck expressions do not behave correctly

ArgumentAttr should not cache stuck trees

Reviewed-by: vromero

langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/comp/ArgumentAttr.java

@@ -365,18 +365,22 @@ public class ArgumentAttr extends JCTree.Visitor {
 
         @Override
         Type speculativeType(Symbol msym, MethodResolutionPhase phase) {
-            for (Map.Entry<ResultInfo, Type> _entry : speculativeTypes.entrySet()) {
-                DeferredAttrContext deferredAttrContext = _entry.getKey().checkContext.deferredAttrContext();
-                if (deferredAttrContext.phase == phase && deferredAttrContext.msym == msym) {
-                    return _entry.getValue();
+            if (pertinentToApplicability) {
+                for (Map.Entry<ResultInfo, Type> _entry : speculativeTypes.entrySet()) {
+                    DeferredAttrContext deferredAttrContext = _entry.getKey().checkContext.deferredAttrContext();
+                    if (deferredAttrContext.phase == phase && deferredAttrContext.msym == msym) {
+                        return _entry.getValue();
+                    }
                 }
+                return Type.noType;
+            } else {
+                return super.speculativeType(msym, phase);
             }
-            return Type.noType;
         }
 
         @Override
         JCTree speculativeTree(DeferredAttrContext deferredAttrContext) {
-            return speculativeTree;
+            return pertinentToApplicability ? speculativeTree : super.speculativeTree(deferredAttrContext);
         }
 
         /**

langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/comp/DeferredAttr.java

@@ -172,6 +172,7 @@ public class DeferredAttr extends JCTree.Visitor {
         public JCExpression tree;
         Env<AttrContext> env;
         AttrMode mode;
+        boolean pertinentToApplicability = true;
         SpeculativeCache speculativeCache;
 
         DeferredType(JCExpression tree, Env<AttrContext> env) {
@@ -290,6 +291,7 @@ public class DeferredAttr extends JCTree.Visitor {
                     resultInfo.checkContext.deferredAttrContext();
             Assert.check(deferredAttrContext != emptyDeferredAttrContext);
             if (deferredStuckPolicy.isStuck()) {
+                pertinentToApplicability = false;
                 deferredAttrContext.addDeferredAttrNode(this, resultInfo, deferredStuckPolicy);
                 return Type.noType;
             } else {

langtools/test/tools/javac/lambda/speculative/8154180/T8154180a.java

@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2016, 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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.
+ */
+
+import java.util.function.Consumer;
+import java.nio.ByteBuffer;
+
+/*
+ * @test
+ * @bug 8154180
+ * @summary Regression: stuck expressions do not behave correctly
+ * @compile T8154180a.java
+ */
+class T8154180a {
+    T8154180a(Consumer<ByteBuffer> cb) { }
+
+    public static void main(String[] args) {
+        new T8154180a(b -> System.out.println(asString(b)));
+        new T8154180a((b -> System.out.println(asString(b))));
+        new T8154180a(true ? b -> System.out.println(asString(b)) : b -> System.out.println(asString(b)));
+        new T8154180a((true ? b -> System.out.println(asString(b)) : b -> System.out.println(asString(b))));
+        new T8154180a((true ? (b -> System.out.println(asString(b))) : (b -> System.out.println(asString(b)))));
+    }
+
+    static String asString(ByteBuffer buf) {
+        return null;
+    }
+}

langtools/test/tools/javac/lambda/speculative/8154180/T8154180b.java

@@ -0,0 +1,27 @@
+/*
+ * @test /nodynamiccopyright/
+ * @bug 8154180
+ * @summary Regression: stuck expressions do not behave correctly
+ * @compile/fail/ref=T8154180b.out -XDrawDiagnostics T8154180b.java
+ */
+class T8154180b {
+    interface Foo1 {
+       Object m(String s);
+    }
+
+    interface Foo2 {
+       String m(String s);
+    }
+
+
+    void m(Foo1 f1) { }
+    void m(Foo2 f2) { }
+
+    void test() {
+        m(x->"");
+        m((x->""));
+        m(true ? x -> "" : x -> "");
+        m((true ? x -> "" : x -> ""));
+        m((true ? (x -> "") : (x -> "")));
+    }
+}

langtools/test/tools/javac/lambda/speculative/8154180/T8154180b.out

@@ -0,0 +1,6 @@
+T8154180b.java:21:9: compiler.err.ref.ambiguous: m, kindname.method, m(T8154180b.Foo1), T8154180b, kindname.method, m(T8154180b.Foo2), T8154180b
+T8154180b.java:22:9: compiler.err.ref.ambiguous: m, kindname.method, m(T8154180b.Foo1), T8154180b, kindname.method, m(T8154180b.Foo2), T8154180b
+T8154180b.java:23:9: compiler.err.ref.ambiguous: m, kindname.method, m(T8154180b.Foo1), T8154180b, kindname.method, m(T8154180b.Foo2), T8154180b
+T8154180b.java:24:9: compiler.err.ref.ambiguous: m, kindname.method, m(T8154180b.Foo1), T8154180b, kindname.method, m(T8154180b.Foo2), T8154180b
+T8154180b.java:25:9: compiler.err.ref.ambiguous: m, kindname.method, m(T8154180b.Foo1), T8154180b, kindname.method, m(T8154180b.Foo2), T8154180b
+5 errors