[jira] [Created] (GROOVY-9213) Parser runs (possibly) endless loop for unclosed parenthesis followed by many expressions/statements

["Eric Milles (JIRA)" <ji...@apache.org>]

Eric Milles created GROOVY-9213:
-----------------------------------

             Summary: Parser runs (possibly) endless loop for unclosed parenthesis followed by many expressions/statements
                 Key: GROOVY-9213
                 URL: https://issues.apache.org/jira/browse/GROOVY-9213
             Project: Groovy
          Issue Type: Documentation
          Components: parser-antlr2, parser-antlr4
            Reporter: Eric Milles


Consider the following:
{code:groovy}
int a = 0
// insert ( here instead of this comment and try to select anything below
a = 0
a = 0
a = 0
... (like 50 times)
{code}

With the unmatched parenthesis inserted at line 2, there is a loop in the parser looking for command arguments.

Here is a test case that demonstrates:
{code:groovy}
import groovy.transform.CompileStatic
import org.junit.Test

import static groovy.test.GroovyAssert.shouldFail

@CompileStatic
final class Groovy9999 {

    @Test(timeout=15000L)
    void testUnmatchedParenInLongScript() {
        def err = shouldFail '''
            int a = 0
            (
        ''' + ('            a = 0\n' * 50)
    }
}
{code}

This is a problem for users editing Groovy scripts in the IDE: https://github.com/groovy/groovy-eclipse/issues/932



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