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https://issues.apache.org/jira/browse/GROOVY-9370?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Eric Milles reassigned GROOVY-9370:
-----------------------------------
Assignee: Eric Milles
> Type inference regression with anonymous class and nested closure type
> coersion to SAM
> --------------------------------------------------------------------------------------
>
> Key: GROOVY-9370
> URL: https://issues.apache.org/jira/browse/GROOVY-9370
> Project: Groovy
> Issue Type: Bug
> Components: Static Type Checker
> Affects Versions: 2.5.9, 3.0.0-rc-3
> Reporter: Bjørn Mølgård Vester
> Assignee: Eric Milles
> Priority: Minor
>
> The following code works in Groovy 2.5.8 but fails in 2.5.9 (and 3.0.0-rc-3):
> {code:java}
> @groovy.transform.CompileStatic
> @FunctionalInterface
> interface Invoker {
> void invoke()
> }
> @groovy.transform.CompileStatic
> class Library {
> void something(Invoker invoker) {
> invoker.invoke()
> }
> void somethingElse() {
> }
> }
> @groovy.transform.CompileStatic
> class Main {
> final Library lib = new Library()
> void main() {
> new Invoker() { // Anonymous class
> void invoke() {
> lib.something { // Coerce to SAM
> lib.somethingElse() // This fails
> }
> }
> }
> }
> }
> {code}
> Compiler error:
> {noformat}
> > Task :compileGroovy
> startup failed:
> C:\Work\Groovy-STC-bug\src\main\groovy\groovy\Main.groovy: 25: [Static type
> checking] - Cannot find matching method java.lang.Object#somethingElse().
> Please check if the declared type is correct and if the method exists.
> @ line 25, column 21.
> lib.somethingElse() // This fails
> ^
> 1 error
> > Task :compileGroovy FAILED
> {noformat}
> The problem occurs only with the combination of an anonymous class with a
> nested closure that is type coerced to a SAM interface. It works fine the
> other way around, or if both are using anonymous classes or both are using
> type coercions. For the same reason, it is easy to work around. But it is an
> annoying bug nevertheless.
> At this time, there are a few other type checking issues open that describes
> problems that manifests themselves with "Cannot find matching method
> java.lang.Object". But I think this is a different root cause than those.
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