Rule precedence lost if followed by ';'.

[cznic]

In yacc/parser.y the rule

|       prec ';'

should behave the same as

|       prec ';'
        {
                $$ = $1
        }

But is does not, at least not in this case, so a rule precedence specification followed by a semicolon is lost. This seems to be a bug in the original Go yacc ($ go tool yacc). Goyacc inherits the problem.

[cznic]

Possible cause: golang/go#10192.

[cznic]

I believe this was fixed long ago in goyacc.