Access to an invalid object

[mingodad]

While testing tscc with the https://github.com/Hadron67/tscc-compiler/blob/master/examples/zend/jzend_parser.y and intentionally commenting this line:

//%left UNARY

When trying to execute it on https://hadroncfy.com/tscc-compiler/web-demo/

Uncaught TypeError: Cannot read properties of undefined (reading 'pr')
    at Object.defineRulePr (tscc.js:2963:28)
    at jjdoReduction (tscc.js:5873:24)
    at jjtryReduce (tscc.js:6060:13)
    at jjacceptToken (tscc.js:6042:21)
    at jjdoLexAction (tscc.js:5300:36)
    at jjacceptChar (tscc.js:5388:21)
    at nextToken (tscc.js:4861:17)
    at Object.parse (tscc.js:4900:17)
    at yyparse (tscc.js:6237:12)
    at Object.compile (tscc.js:8480:17)

With this change it seems to work:

        else {
            var pt = _pseudoTokens[token.val];
            if(!pt){
                singlePosErr(`pseudo token "${token}" is not defined`, token);
            }
            else _top().pr = pt.pr; ///<<< adding `else` before 
        }