diff -r 5715962c8831 -r 04f9bb270ab8 src/jdk.compiler/share/classes/com/sun/tools/javac/comp/DeferredAttr.java
--- a/src/jdk.compiler/share/classes/com/sun/tools/javac/comp/DeferredAttr.java	Thu May 24 14:35:32 2018 +0530
+++ b/src/jdk.compiler/share/classes/com/sun/tools/javac/comp/DeferredAttr.java	Thu May 24 11:13:42 2018 +0100
@@ -883,8 +883,9 @@
                 Check.CheckContext checkContext = resultInfo.checkContext;
                 Type pt = resultInfo.pt;
                 if (!inferenceContext.inferencevars.contains(pt)) {
+                    Type descriptor = null;
                     try {
-                        types.findDescriptorType(pt);
+                        descriptor = types.findDescriptorType(pt);
                     } catch (Types.FunctionDescriptorLookupError ex) {
                         checkContext.report(null, ex.getDiagnostic());
                     }
@@ -893,14 +894,14 @@
                     exprTree = (JCExpression)attribSpeculative(tree.getQualifierExpression(), localEnv,
                             attr.memberReferenceQualifierResult(tree), argumentAttr.withLocalCacheContext());
                     ListBuffer<Type> argtypes = new ListBuffer<>();
-                    for (Type t : types.findDescriptorType(pt).getParameterTypes()) {
+                    for (Type t : descriptor.getParameterTypes()) {
                         argtypes.append(Type.noType);
                     }
                     JCMemberReference mref2 = new TreeCopier<Void>(make).copy(tree);
                     mref2.expr = exprTree;
                     Symbol lookupSym =
                             rs.resolveMemberReference(localEnv, mref2, exprTree.type,
-                                    tree.name, argtypes.toList(), List.nil(), rs.arityMethodCheck,
+                                    tree.name, argtypes.toList(), List.nil(), descriptor, rs.arityMethodCheck,
                                     inferenceContext, rs.structuralReferenceChooser).fst;
                     switch (lookupSym.kind) {
                         case WRONG_MTH: