[CAY-2464] ClassCastException when returning PRUNED_NODE in expression transformer

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.1.3, 4.0, 4.1.M2
• Fix Version/s: 4.0.1, 4.1.B1
• Component/s: Core Library
• Assignee: Nikita Timofeev
• Reporter: Nikita Timofeev
• Created: 28/Aug/18 09:56
• Updated: 29/Aug/18 11:42
• Resolved: 29/Aug/18 11:42

Description

This one is from pull request.
Simple test case:

Expression exp = ExpressionFactory.exp("(false and true) and true");
Expression transformed = exp.transform(node -> {
    if(node instanceof ASTFalse) {
        return Expression.PRUNED_NODE;
    }
    return node;
});
assertEquals("true and true", transformed.toString());