[jira] [Commented] (GROOVY-6220) Compiler gives very cryptic error messages for unterminated regexes

["Paul King (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/GROOVY-6220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15082380#comment-15082380 ] 

Paul King commented on GROOVY-6220:
-----------------------------------

I imagine this will be easier to try to resolve once we move to Antlr 4.

> Compiler gives very cryptic error messages for unterminated regexes
> -------------------------------------------------------------------
>
>                 Key: GROOVY-6220
>                 URL: https://issues.apache.org/jira/browse/GROOVY-6220
>             Project: Groovy
>          Issue Type: Bug
>          Components: Compiler
>    Affects Versions: 1.8.6, 2.4.5
>         Environment: Used with Gradle 1.6 on Windows XP.
>            Reporter: Tomas Lycken
>            Priority: Minor
>         Attachments: SillyClass.groovy, build.gradle
>
>
> When a Groovy class file has an unterminated regex somewhere, the compiler states that there is an invalid character 0xFFFF at the end of the file, rather than pointing at the unterminated regex.
> MWE (also attached)
>     package silly
>     public class SillyClass {
>         public SillyClass() {
>             println "testString".replaceAll(/\B[A-Z]) { it.toLowerCase() }
>         }
>     }
> Compiler error:
> <project path...>\src\main\groovy\silly\SillyClass.groovy: 9: unexpected char: 0xFFFF @ line 9, column 1.
> 1 error
> If this error is fixed in a later Groovy release, please let me know so I can file an issue with Gradle to update =)



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