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