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https://issues.apache.org/jira/browse/GROOVY-11397?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eric Milles reassigned GROOVY-11397:
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Assignee: Eric Milles
> Regression in SAM parameter type checking
> -----------------------------------------
>
> Key: GROOVY-11397
> URL: https://issues.apache.org/jira/browse/GROOVY-11397
> Project: Groovy
> Issue Type: Bug
> Components: Static Type Checker
> Affects Versions: 3.0.18, 3.0.19, 3.0.20, 3.0.21
> Reporter: Octavia Togami
> Assignee: Eric Milles
> Priority: Minor
>
> A regression in 3.0.18, possibly related to
> https://issues.apache.org/jira/browse/GROOVY-11013, causes the following code
> to no longer compile:
> {code:java}
> @groovy.transform.CompileStatic
> class TestClass {
> interface Action<T> { void run(T t); }
> interface Exec { void doSomething(); }
> private Exec configExec(Action<Exec> action) { return null; }
> private Exec createExec() {
> return configExec({ Exec it ->
> it.doSomething()
> } as Action)
> }
> }
> {code}
> {code:java}
> org.codehaus.groovy.control.MultipleCompilationErrorsException: startup
> failed:
> TestClass.groovy: 11: [Static type checking] - Cannot find matching method
> java.lang.Object#doSomething(). Please check if the declared type is correct
> and if the method exists.
> @ line 11, column 13.
> it.doSomething()
> ^
> 1 error
> {code}
> It appears that for some reason, the cast to `Action` is overriding the more
> explicit type of the parameter, resulting in `it` now having the type of
> `Object`. Changing the cast to be `as Action<Exec>` fixes the problem.
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