Index: compiler/org/eclipse/jdt/internal/compiler/lookup/SourceTypeBinding.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/compiler/org/eclipse/jdt/internal/compiler/lookup/SourceTypeBinding.java,v
retrieving revision 1.142
diff -u -r1.142 SourceTypeBinding.java
--- compiler/org/eclipse/jdt/internal/compiler/lookup/SourceTypeBinding.java	16 Nov 2006 16:13:48 -0000	1.142
+++ compiler/org/eclipse/jdt/internal/compiler/lookup/SourceTypeBinding.java	8 Jan 2007 20:19:20 -0000
@@ -1351,7 +1351,8 @@
 	Argument[] arguments = methodDecl.arguments;
 	if (arguments != null) {
 		int size = arguments.length;
-		method.parameters = new TypeBinding[size];
+		method.parameters = Binding.NO_PARAMETERS;
+		TypeBinding[] newParameters = new TypeBinding[size];
 		for (int i = 0; i < size; i++) {
 			Argument arg = arguments[i];
 			TypeBinding parameterType = arg.type.resolveType(methodDecl.scope, true /* check bounds*/);
@@ -1367,9 +1368,12 @@
 				TypeBinding leafType = parameterType.leafComponentType();
 			    if (leafType instanceof ReferenceBinding && (((ReferenceBinding) leafType).modifiers & ExtraCompilerModifiers.AccGenericSignature) != 0)
 					method.modifiers |= ExtraCompilerModifiers.AccGenericSignature;
-				method.parameters[i] = parameterType;
+				newParameters[i] = parameterType;
 			}
 		}
+		// only assign parameters if no problems are found
+		if (!foundArgProblem)
+			method.parameters = newParameters;
 	}
 
 	boolean foundReturnTypeProblem = false;
Index: compiler/org/eclipse/jdt/internal/compiler/Compiler.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/compiler/org/eclipse/jdt/internal/compiler/Compiler.java,v
retrieving revision 1.86
diff -u -r1.86 Compiler.java
--- compiler/org/eclipse/jdt/internal/compiler/Compiler.java	22 Dec 2006 16:02:08 -0000	1.86
+++ compiler/org/eclipse/jdt/internal/compiler/Compiler.java	8 Jan 2007 20:19:20 -0000
@@ -692,6 +692,7 @@
 				// binding resolution
 				lookupEnvironment.completeTypeBindings();
 			}
+			this.lookupEnvironment.unitBeingCompleted = unit;
 			this.parser.getMethodBodies(unit);
 			if (unit.scope != null) {
 				// fault in fields & methods
@@ -723,6 +724,7 @@
 			this.handleInternalException(e, unit, null);
 			throw e; // rethrow
 		} finally {
+			this.lookupEnvironment.unitBeingCompleted = null;
 			// No reset is performed there anymore since,
 			// within the CodeAssist (or related tools),
 			// the compiler may be called *after* a call