[new-parser] Parser should expect the final EOF, otherwise it can stop prematurely and report no error

[yurloc]

Parent issue

• Experiment: New DRL parser #5678

Failing tests

• org.drools.mvel.integrationtests.ParserTest#testErrorsParser

Notes

For example, if there is a typo in the import keyword (or any other keyword that starts a DRL statement, such as rule or global), the parser cannot match a drlStatement and it bails out gracefully, ignoring the rest of the input and reporting no error.

Rule code snippet

package org.drools.compiler.test;

impot org.drools.compiler.test.model.Cheese;

rule "eval rule test" ...

Error output

No error.

[yurloc]

/take