8037385: constant pool errors with -target 1.7 and static default methods

Summary: Add error check for static interface methods invoked from -source 7
Reviewed-by: vromero, mcimadamore

src/share/classes/com/sun/tools/javac/comp/Attr.java

@@ -138,6 +138,7 @@ public class Attr extends JCTree.Visitor {
         allowTypeAnnos = source.allowTypeAnnotations();
         allowLambda = source.allowLambda();
         allowDefaultMethods = source.allowDefaultMethods();
+        allowStaticInterfaceMethods = source.allowStaticInterfaceMethods();
         sourceName = source.name;
         relax = (options.isSet("-retrofit") ||
                  options.isSet("-relax"));
@@ -195,6 +196,10 @@ public class Attr extends JCTree.Visitor {
      */
     boolean allowDefaultMethods;
 
+    /** Switch: static interface methods enabled?
+     */
+    boolean allowStaticInterfaceMethods;
+
     /** Switch: allow references to surrounding object from anonymous
      * objects during constructor call?
      */
@@ -3323,6 +3328,10 @@ public class Attr extends JCTree.Visitor {
                               tree.pos(), site, sym.name, true);
                 }
             }
+            if (!allowStaticInterfaceMethods && sitesym.isInterface() &&
+                    sym.isStatic() && sym.kind == MTH) {
+                log.error(tree.pos(), "static.intf.method.invoke.not.supported.in.source", sourceName);
+            }
         } else if (sym.kind != ERR && (sym.flags() & STATIC) != 0 && sym.name != names._class) {
             // If the qualified item is not a type and the selected item is static, report
             // a warning. Make allowance for the class of an array type e.g. Object[].class)

src/share/classes/com/sun/tools/javac/resources/compiler.properties

@@ -2390,6 +2390,11 @@ compiler.err.static.intf.methods.not.supported.in.source=\
     static interface methods are not supported in -source {0}\n\
     (use -source 8 or higher to enable static interface methods)
 
+# 0: string
+compiler.err.static.intf.method.invoke.not.supported.in.source=\
+    static interface method invocations are not supported in -source {0}\n\
+    (use -source 8 or higher to enable static interface method invocations)
+
 ########################################
 # Diagnostics for verbose resolution
 # used by Resolve (debug only)

test/tools/javac/diags/examples/StaticIntfMethodInvokeNotSupported.java

+/*
+ * Copyright (c) 2014, 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.
+ */
+
+// key: compiler.err.static.intf.method.invoke.not.supported.in.source
+// options: -source 7 -Xlint:-options
+import java.util.stream.Stream;
+
+class StaticIntfMethodInvokeNotSupported {
+    void test() {
+        Stream.empty();
+    }
+}