--- a/src/share/classes/com/sun/tools/javac/code/Symbol.java	Fri May 20 16:04:23 2011 -0700
+++ b/src/share/classes/com/sun/tools/javac/code/Symbol.java	Mon May 23 11:55:55 2011 +0100
@@ -729,10 +729,6 @@
          */
         public Pool pool;
 
-        /** members closure cache (set by Types.membersClosure)
-         */
-        Scope.CompoundScope membersClosure;
-
         public ClassSymbol(long flags, Name name, Type type, Symbol owner) {
             super(flags, name, type, owner);
             this.members_field = null;

--- a/src/share/classes/com/sun/tools/javac/code/Types.java	Fri May 20 16:04:23 2011 -0700
+++ b/src/share/classes/com/sun/tools/javac/code/Types.java	Mon May 23 11:55:55 2011 +0100
@@ -2061,7 +2061,7 @@
                 _map.put(ms, new SoftReference<Map<TypeSymbol, Entry>>(cache));
             }
             Entry e = cache.get(origin);
-            CompoundScope members = membersClosure(origin.type);
+            CompoundScope members = membersClosure(origin.type, true);
             if (e == null ||
                     !e.matches(implFilter, checkResult, members.getMark())) {
                 MethodSymbol impl = implementationInternal(ms, origin, checkResult, implFilter);
@@ -2098,36 +2098,61 @@
     // </editor-fold>
 
     // <editor-fold defaultstate="collapsed" desc="compute transitive closure of all members in given site">
-    public CompoundScope membersClosure(Type site) {
-        return membersClosure.visit(site);
-    }
-
-    UnaryVisitor<CompoundScope> membersClosure = new UnaryVisitor<CompoundScope>() {
-
-        public CompoundScope visitType(Type t, Void s) {
+    class MembersClosureCache extends SimpleVisitor<CompoundScope, Boolean> {
+
+        private WeakHashMap<TypeSymbol, Entry> _map =
+                new WeakHashMap<TypeSymbol, Entry>();
+
+        class Entry {
+            final boolean skipInterfaces;
+            final CompoundScope compoundScope;
+
+            public Entry(boolean skipInterfaces, CompoundScope compoundScope) {
+                this.skipInterfaces = skipInterfaces;
+                this.compoundScope = compoundScope;
+            }
+
+            boolean matches(boolean skipInterfaces) {
+                return this.skipInterfaces == skipInterfaces;
+            }
+        }
+
+        /** members closure visitor methods **/
+
+        public CompoundScope visitType(Type t, Boolean skipInterface) {
             return null;
         }
 
         @Override
-        public CompoundScope visitClassType(ClassType t, Void s) {
+        public CompoundScope visitClassType(ClassType t, Boolean skipInterface) {
             ClassSymbol csym = (ClassSymbol)t.tsym;
-            if (csym.membersClosure == null) {
+            Entry e = _map.get(csym);
+            if (e == null || !e.matches(skipInterface)) {
                 CompoundScope membersClosure = new CompoundScope(csym);
-                for (Type i : interfaces(t)) {
-                    membersClosure.addSubScope(visit(i));
+                if (!skipInterface) {
+                    for (Type i : interfaces(t)) {
+                        membersClosure.addSubScope(visit(i, skipInterface));
+                    }
                 }
-                membersClosure.addSubScope(visit(supertype(t)));
+                membersClosure.addSubScope(visit(supertype(t), skipInterface));
                 membersClosure.addSubScope(csym.members());
-                csym.membersClosure = membersClosure;
+                e = new Entry(skipInterface, membersClosure);
+                _map.put(csym, e);
             }
-            return csym.membersClosure;
+            return e.compoundScope;
         }
 
         @Override
-        public CompoundScope visitTypeVar(TypeVar t, Void s) {
-            return visit(t.getUpperBound());
+        public CompoundScope visitTypeVar(TypeVar t, Boolean skipInterface) {
+            return visit(t.getUpperBound(), skipInterface);
         }
-    };
+    }
+
+    private MembersClosureCache membersCache = new MembersClosureCache();
+
+    public CompoundScope membersClosure(Type site, boolean skipInterface) {
+        return membersCache.visit(site, skipInterface);
+    }
     // </editor-fold>
 
     /**

--- a/src/share/classes/com/sun/tools/javac/comp/Check.java	Fri May 20 16:04:23 2011 -0700
+++ b/src/share/classes/com/sun/tools/javac/comp/Check.java	Mon May 23 11:55:55 2011 +0100
@@ -2098,10 +2098,10 @@
     void checkOverrideClashes(DiagnosticPosition pos, Type site, MethodSymbol sym) {
          ClashFilter cf = new ClashFilter(site);
          //for each method m1 that is a member of 'site'...
-         for (Symbol s1 : types.membersClosure(site).getElementsByName(sym.name, cf)) {
+         for (Symbol s1 : types.membersClosure(site, false).getElementsByName(sym.name, cf)) {
             //...find another method m2 that is overridden (directly or indirectly)
             //by method 'sym' in 'site'
-            for (Symbol s2 : types.membersClosure(site).getElementsByName(sym.name, cf)) {
+            for (Symbol s2 : types.membersClosure(site, false).getElementsByName(sym.name, cf)) {
                 if (s1 == s2 || !sym.overrides(s2, site.tsym, types, false)) continue;
                 //if (i) the signature of 'sym' is not a subsignature of m1 (seen as
                 //a member of 'site') and (ii) m1 has the same erasure as m2, issue an error
@@ -2134,7 +2134,7 @@
     void checkHideClashes(DiagnosticPosition pos, Type site, MethodSymbol sym) {
         ClashFilter cf = new ClashFilter(site);
         //for each method m1 that is a member of 'site'...
-        for (Symbol s : types.membersClosure(site).getElementsByName(sym.name, cf)) {
+        for (Symbol s : types.membersClosure(site, true).getElementsByName(sym.name, cf)) {
             //if (i) the signature of 'sym' is not a subsignature of m1 (seen as
             //a member of 'site') and (ii) 'sym' has the same erasure as m1, issue an error
             if (!types.isSubSignature(sym.type, types.memberType(site, s), false) &&

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/tools/javac/scope/7046348/EagerInterfaceCompletionTest.java	Mon May 23 11:55:55 2011 +0100
@@ -0,0 +1,206 @@
+/*
+ * Copyright (c) 2011, 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     7046348
+ * @summary Regression: javac complains of missing classfile for a seemingly unrelated interface
+ */
+
+import java.io.File;
+import java.net.URI;
+import java.util.Arrays;
+
+import javax.tools.Diagnostic;
+import javax.tools.DiagnosticListener;
+import javax.tools.JavaCompiler;
+import javax.tools.JavaCompiler.CompilationTask;
+import javax.tools.JavaFileObject;
+import javax.tools.SimpleJavaFileObject;
+import javax.tools.ToolProvider;
+
+public class EagerInterfaceCompletionTest {
+
+    JavaCompiler javacTool;
+    File testDir;
+    HierarchyKind hierarchyKind;
+    TestKind testKind;
+    ActionKind actionKind;
+
+    EagerInterfaceCompletionTest(JavaCompiler javacTool, File testDir,
+            HierarchyKind hierarchyKind, TestKind testKind, ActionKind actionKind) {
+        this.javacTool = javacTool;
+        this.hierarchyKind = hierarchyKind;
+        this.testDir = testDir;
+        this.testKind = testKind;
+        this.actionKind = actionKind;
+    }
+
+    void test() {
+        testDir.mkdirs();
+        compile(null, hierarchyKind.source);
+        actionKind.doAction(this);
+        DiagnosticChecker dc = new DiagnosticChecker();
+        compile(dc, testKind.source);
+        if (testKind.completionFailure(actionKind, hierarchyKind) != dc.errorFound) {
+            if (dc.errorFound) {
+                error("Unexpected completion failure" +
+                      "\nhierarhcyKind " + hierarchyKind +
+                      "\ntestKind " + testKind +
+                      "\nactionKind " + actionKind);
+            } else {
+                error("Missing completion failure " +
+                          "\nhierarhcyKind " + hierarchyKind +
+                          "\ntestKind " + testKind +
+                          "\nactionKind " + actionKind);
+            }
+        }
+    }
+
+    void compile(DiagnosticChecker dc, JavaSource... sources) {
+        try {
+            CompilationTask ct = javacTool.getTask(null, null, dc,
+                    Arrays.asList("-d", testDir.getAbsolutePath(), "-cp", testDir.getAbsolutePath()),
+                    null, Arrays.asList(sources));
+            ct.call();
+        }
+        catch (Exception e) {
+            e.printStackTrace();
+            error("Internal compilation error");
+        }
+    }
+
+    void removeClass(String classToRemoveStr) {
+        File classToRemove = new File(testDir, classToRemoveStr);
+        if (!classToRemove.exists()) {
+            error("Expected file " + classToRemove + " does not exists in folder " + testDir);
+        }
+        classToRemove.delete();
+    };
+
+    void error(String msg) {
+        System.err.println(msg);
+        nerrors++;
+    }
+
+    class DiagnosticChecker implements DiagnosticListener<JavaFileObject> {
+
+        boolean errorFound = false;
+
+        public void report(Diagnostic<? extends JavaFileObject> diagnostic) {
+            errorFound = true;
+        }
+    }
+
+    //global declarations
+
+    enum HierarchyKind {
+        INTERFACE("interface A { boolean f = false; void m(); }\n" +
+                  "class B implements A { public void m() {} }"),
+        CLASS("class A { boolean f; void m() {} }\n" +
+              "class B extends A { void m() {} }"),
+        ABSTRACT_CLASS("abstract class A { boolean f; abstract void m(); }\n" +
+                       "class B extends A { void m() {} }");
+
+        JavaSource source;
+
+        private HierarchyKind(String code) {
+            this.source = new JavaSource("Test1.java", code);
+        }
+    }
+
+    enum ActionKind {
+        REMOVE_A("A.class"),
+        REMOVE_B("B.class");
+
+        String classFile;
+
+        private ActionKind(String classFile) {
+            this.classFile = classFile;
+        }
+
+        void doAction(EagerInterfaceCompletionTest test) {
+            test.removeClass(classFile);
+        };
+    }
+
+    enum TestKind {
+        ACCESS_ONLY("class C { B b; }"),
+        SUPER("class C extends B {}"),
+        METHOD("class C { void test(B b) { b.m(); } }"),
+        FIELD("class C { void test(B b) { boolean b2 = b.f; } }"),
+        CONSTR("class C { void test() { new B(); } }");
+
+        JavaSource source;
+
+        private TestKind(final String code) {
+            this.source = new JavaSource("Test2.java", code);
+        }
+
+        boolean completionFailure(ActionKind ak, HierarchyKind hk) {
+            switch (this) {
+                case ACCESS_ONLY:
+                case CONSTR: return ak == ActionKind.REMOVE_B;
+                case FIELD:
+                case SUPER: return true;
+                case METHOD: return hk != HierarchyKind.INTERFACE || ak == ActionKind.REMOVE_B;
+                default: throw new AssertionError("Unexpected test kind " + this);
+            }
+        }
+    }
+
+    public static void main(String[] args) throws Exception {
+        String SCRATCH_DIR = System.getProperty("user.dir");
+        JavaCompiler javacTool = ToolProvider.getSystemJavaCompiler();
+        int n = 0;
+        for (HierarchyKind hierarchyKind : HierarchyKind.values()) {
+            for (TestKind testKind : TestKind.values()) {
+                for (ActionKind actionKind : ActionKind.values()) {
+                    File testDir = new File(SCRATCH_DIR, "test"+n);
+                    new EagerInterfaceCompletionTest(javacTool, testDir, hierarchyKind, testKind, actionKind).test();
+                    n++;
+                }
+            }
+        }
+        if (nerrors > 0) {
+            throw new AssertionError("Some errors have been detected");
+        }
+    }
+
+    static class JavaSource extends SimpleJavaFileObject {
+
+        String source;
+
+        public JavaSource(String filename, String source) {
+            super(URI.create("myfo:/" + filename), JavaFileObject.Kind.SOURCE);
+            this.source = source;
+        }
+
+        @Override
+        public CharSequence getCharContent(boolean ignoreEncodingErrors) {
+            return source;
+        }
+    }
+
+    static int nerrors = 0;
+}