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https://issues.apache.org/jira/browse/GROOVY-8237?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16177911#comment-16177911
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John Wagenleitner commented on GROOVY-8237:
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Just wanted to note here that PR https://github.com/apache/groovy/pull/605
includes a test that was provided in this issue.
> Invalid type inference when using CompileStatic annotation
> ----------------------------------------------------------
>
> Key: GROOVY-8237
> URL: https://issues.apache.org/jira/browse/GROOVY-8237
> Project: Groovy
> Issue Type: Bug
> Affects Versions: 2.4.12
> Reporter: paolo di tommaso
>
> With Groovy 2.4.12 the following snippet report an error
> {code}
> @groovy.transform.CompileStatic
> class Foo {
> String parse(Reader reader) {
> if ( reader == null ) { // != works okay
> reader = new BufferedReader(reader)
> }
>
> def c
> while ((c = reader.read()) != -1)
> print c as char
> }
> }
> new Foo().parse( new StringReader('abc') )
> {code}
> The following exception is thrown
> {code}
> org.codehaus.groovy.runtime.typehandling.GroovyCastException: Cannot cast
> object 'java.io.StringReader@7a636960' with class 'java.io.StringReader' to
> class 'java.io.BufferedReader'
> {code}
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