### Eclipse Workspace Patch 1.0
#P org.eclipse.jdt.core
Index: compiler/org/eclipse/jdt/internal/compiler/ast/CompoundAssignment.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/compiler/org/eclipse/jdt/internal/compiler/ast/CompoundAssignment.java,v
retrieving revision 1.59
diff -u -r1.59 CompoundAssignment.java
--- compiler/org/eclipse/jdt/internal/compiler/ast/CompoundAssignment.java	30 Jun 2009 14:24:18 -0000	1.59
+++ compiler/org/eclipse/jdt/internal/compiler/ast/CompoundAssignment.java	22 Jul 2009 15:50:02 -0000
@@ -107,6 +107,9 @@
 			scope.problemReporter().expressionShouldBeAVariable(this.lhs);
 			return null;
 		}
+		boolean expressionIsCast = this.expression instanceof CastExpression;
+		if (expressionIsCast)
+			this.expression.bits |= ASTNode.DisableUnnecessaryCastCheck; // will check later on
 		TypeBinding originalLhsType = this.lhs.resolveType(scope);
 		TypeBinding originalExpressionType = this.expression.resolveType(scope);
 		if (originalLhsType == null || originalExpressionType == null)
@@ -181,6 +184,8 @@
 		this.expression.computeConversion(scope, TypeBinding.wellKnownType(scope, (result >>> 8) & 0x0000F), originalExpressionType);
 		this.preAssignImplicitConversion =  (unboxedLhs ? BOXING : 0) | (lhsID << 4) | (result & 0x0000F);
 		if (unboxedLhs) scope.problemReporter().autoboxing(this, lhsType, originalLhsType);
+		if (expressionIsCast)
+			CastExpression.checkNeedForArgumentCasts(scope, this.operator, result, this.lhs, originalLhsType.id, false, this.expression, originalExpressionType.id, true);
 		return this.resolvedType = originalLhsType;
 	}
 
#P org.eclipse.jdt.core.tests.compiler
Index: src/org/eclipse/jdt/core/tests/compiler/regression/CastTest.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core.tests.compiler/src/org/eclipse/jdt/core/tests/compiler/regression/CastTest.java,v
retrieving revision 1.47
diff -u -r1.47 CastTest.java
--- src/org/eclipse/jdt/core/tests/compiler/regression/CastTest.java	15 Jul 2009 18:10:26 -0000	1.47
+++ src/org/eclipse/jdt/core/tests/compiler/regression/CastTest.java	22 Jul 2009 15:50:03 -0000
@@ -1719,7 +1719,7 @@
 		"3");
 }
 //https://bugs.eclipse.org/bugs/show_bug.cgi?id=282869
-public void _test046() {
+public void test046() {
 	this.runConformTest(
 		true,
 		new String[] {