8025816: javac crash with method reference with a type variable as the site

Reviewed-by: jjg

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

@@ -424,13 +424,14 @@ public class Resolve {
          */
         private
         boolean isProtectedAccessible(Symbol sym, ClassSymbol c, Type site) {
+            Type newSite = site.hasTag(TYPEVAR) ? site.getUpperBound() : site;
             while (c != null &&
                    !(c.isSubClass(sym.owner, types) &&
                      (c.flags() & INTERFACE) == 0 &&
                      // In JLS 2e 6.6.2.1, the subclass restriction applies
                      // only to instance fields and methods -- types are excluded
                      // regardless of whether they are declared 'static' or not.
-                     ((sym.flags() & STATIC) != 0 || sym.kind == TYP || site.tsym.isSubClass(c, types))))
+                     ((sym.flags() & STATIC) != 0 || sym.kind == TYP || newSite.tsym.isSubClass(c, types))))
                 c = c.owner.enclClass();
             return c != null;
         }
@@ -2710,11 +2711,6 @@ public class Resolve {
                                   InferenceContext inferenceContext) {
         MethodResolutionPhase maxPhase = boxingAllowed ? VARARITY : BASIC;
 
-        if (site.hasTag(TYPEVAR)) {
-            return resolveMemberReference(pos, env, referenceTree, site.getUpperBound(),
-                    name, argtypes, typeargtypes, boxingAllowed, methodCheck, inferenceContext);
-        }
-
         site = types.capture(site);
 
         ReferenceLookupHelper boundLookupHelper;

test/tools/javac/lambda/T8025816/CrashMethodReferenceWithSiteTypeVarTest.java

+/*
+ * Copyright (c) 2013, 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 8025816
+ * @summary Compiler crash when default method call with method reference
+ * @compile CrashMethodReferenceWithSiteTypeVarTest.java
+ */
+
+import java.util.Collection;
+import java.util.Comparator;
+
+public class CrashMethodReferenceWithSiteTypeVarTest {
+    public <T> void m1(Collection<T> c, Comparator<T> comp) {}
+
+    public <T extends Comparable> void m2(Collection<T> c) {
+        m1(c, T::compareTo);
+    }
+}