### 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	15 Jul 2009 16:57:21 -0000
@@ -108,6 +108,8 @@
 			return null;
 		}
 		TypeBinding originalLhsType = this.lhs.resolveType(scope);
+		boolean expressionIsCast;
+		if ((expressionIsCast = this.expression instanceof CastExpression) == true) this.expression.bits |= ASTNode.DisableUnnecessaryCastCheck; // will check later on
 		TypeBinding originalExpressionType = this.expression.resolveType(scope);
 		if (originalLhsType == null || originalExpressionType == null)
 			return null;
@@ -181,6 +183,10 @@
 		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);
+		// check need for operand cast
+		if (expressionIsCast) {
+			CastExpression.checkNeedForArgumentCasts(scope, this.operator, result, this.lhs, originalLhsType.id, false, this.expression, originalExpressionType.id, true);
+		}
 		return this.resolvedType = originalLhsType;
 	}