Labels in grammar causing errors

[trickster]

MInimal repro repo - https://github.com/trickster/antlr-kotlin-example

    public open class ExprContext : ParserRuleContext {
        override val ruleIndex: Int = Rules.Expr

        @JvmField @JsName("left$") public var left: ExprContext? = null
        @JvmField @JsName("right$") public var right: ExprContext? = null

JsName is not available on JVM target. Is there a workaround for this?

grammar EasyScript ;

start : expr EOF ;

expr : left=expr '+' right=expr // <- labels here
     | literal
     ;

literal : INT | DOUBLE;
fragment DIGIT : [0-9];

INT : DIGIT+ ;
DOUBLE : DIGIT+ '.' DIGIT+ ;
WS : (' ' | '\r' | '\t' | '\n' | '\f')+ -> skip ;

[trickster]

Solved by upgrading to RC2