### Eclipse Workspace Patch 1.0
#P org.eclipse.wst.jsdt.core
Index: src/org/eclipse/wst/jsdt/internal/compiler/ast/FieldReference.java
===================================================================
RCS file: /cvsroot/webtools/org.eclipse.jsdt/plugins/org.eclipse.wst.jsdt.core/src/org/eclipse/wst/jsdt/internal/compiler/ast/FieldReference.java,v
retrieving revision 1.45
diff -u -r1.45 FieldReference.java
--- src/org/eclipse/wst/jsdt/internal/compiler/ast/FieldReference.java	14 Apr 2010 22:22:59 -0000	1.45
+++ src/org/eclipse/wst/jsdt/internal/compiler/ast/FieldReference.java	30 Jun 2010 14:41:41 -0000
@@ -328,6 +328,7 @@
 	   possibleTypeBinding = scope.getBinding( possibleTypeName, Binding.TYPE  & RestrictiveFlagMASK, this, true /*resolve*/);
 	if(possibleTypeBinding != null && possibleTypeBinding.isValidBinding() && (TypeBinding)possibleTypeBinding != scope.getJavaLangObject()) {
 		this.typeBinding=(TypeBinding)possibleTypeBinding;
+		constant = Constant.NotAConstant;
 		this.bits|=Binding.TYPE;
 		return this.typeBinding;
 	}
#P org.eclipse.wst.jsdt.core.tests.compiler
Index: src/org/eclipse/wst/jsdt/core/tests/compiler/regression/BasicResolveTests.java
===================================================================
RCS file: /cvsroot/webtools/org.eclipse.jsdt/tests/org.eclipse.wst.jsdt.core.tests.compiler/src/org/eclipse/wst/jsdt/core/tests/compiler/regression/BasicResolveTests.java,v
retrieving revision 1.46
diff -u -r1.46 BasicResolveTests.java
--- src/org/eclipse/wst/jsdt/core/tests/compiler/regression/BasicResolveTests.java	25 May 2010 21:31:21 -0000	1.46
+++ src/org/eclipse/wst/jsdt/core/tests/compiler/regression/BasicResolveTests.java	30 Jun 2010 14:41:42 -0000
@@ -1746,4 +1746,18 @@
 			);
 	}
 	
+	public void testbug318004() {
+		this.runNegativeTest(
+					new String[] {
+							"Z.js",
+							"var obj = {};\n" +
+							"obj.first = {};\n" +
+							"obj.first.second = function() {};\n" +
+							"obj.first.second.prototype = new Object();\n" +
+							"if({} != obj.first.second) {}"
+					},
+					""
+			);
+	}
+	
 }
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