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https://issues.apache.org/jira/browse/GROOVY-8220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16062400#comment-16062400
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John Wagenleitner commented on GROOVY-8220:
-------------------------------------------
Fix for GROOVY-8157 seems to be the cause.
> GroovyCastException with CompileStatic
> --------------------------------------
>
> Key: GROOVY-8220
> URL: https://issues.apache.org/jira/browse/GROOVY-8220
> Project: Groovy
> Issue Type: Bug
> Affects Versions: 2.5.0-beta-1
> Reporter: paolo di tommaso
>
> {code}
> @groovy.transform.CompileStatic
> class Foo {
> CharSequence makeEnv( env, StringBuilder result = new StringBuilder() ) {
> if( env instanceof File ) {
> env = env.toPath()
> }
> if( env instanceof String && env.contains('=') ) {
> result << 'export ' << env << ';'
> }
> return result.toString()
> }
> }
> assert new Foo().makeEnv('X=1') == 'export X=1;'
> Exception thrown
> org.codehaus.groovy.runtime.typehandling.GroovyCastException: Cannot cast
> object 'X=1' with class 'java.lang.String' to class 'java.lang.Iterable'
> at Foo.makeEnv(ConsoleScript5:10)
> at Foo.makeEnv(ConsoleScript5:4)
> at Foo$makeEnv.call(Unknown Source)
> at ConsoleScript5.run(ConsoleScript5:20)
> {code}
> Without CompileStatic it works as expected.
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