Bug 96926 [quick fix] Change method return type quick fix gives invalid proposal for wildcard types
Against I20050527-0010: Code: void a() { ArrayList<? extends Number> b = null; return b.get(0); } Ask for a quick fix on the compile error. Three things happen: 1) BAD: The quick fix is entitled "Change method return type to '? extends Number'". 2) GOOD: The correct return type, Number, is shown originally. 3) BAD: However, the top completion proposal, and the one chosen if the user simply hits return, is "? extends Number", which creates a compile error.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/correction/UnresolvedElementsSubProcessor.java
}
		if (nDiffs == 0) {
			if (nameNode.getParent() instanceof MethodInvocation) {
				MethodInvocation inv= (MethodInvocation) nameNode.getParent();
				if (inv.getExpression() == null) {
					addQualifierToOuterProposal(context, inv, methodBinding, proposals);
				}
			}
			return;
		}
		if (nDiffs == 1) { 
			int idx= indexOfDiff[0];
			Expression nodeToCast= (Expression) arguments.get(idx);
			ITypeBinding castType= paramTypes[idx];
			castType= Bindings.normalizeTypeBinding(castType);
			if (castType.isWildcardType()) {
				castType= ASTResolving.normalizeWildcardType(castType, false, nodeToCast.getAST());
			}
			if (castType != null) {
				ITypeBinding binding= nodeToCast.resolveTypeBinding();
				if (binding == null || binding.isCastCompatible(castType)) {
					String castTypeName= castType.getQualifiedName();
					ASTRewriteCorrectionProposal proposal= TypeMismatchSubProcessor.createCastProposal(context, castTypeName, castType, nodeToCast, 6);
					String[] arg= new String[] { getArgumentName(cu, arguments, idx), castTypeName};
					proposal.setDisplayName(Messages.format(CorrectionMessages.UnresolvedElementsSubProcessor_addargumentcast_description, arg));
					proposals.add(proposal);
				}
				TypeMismatchSubProcessor.addChangeSenderTypeProposals(context, nodeToCast, castType, false, 5, proposals);
			}
		}