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https://issues.apache.org/jira/browse/GROOVY-8260?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Paul King closed GROOVY-8260.
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> Static compilation requires casting inside instanceof check
> -----------------------------------------------------------
>
> Key: GROOVY-8260
> URL: https://issues.apache.org/jira/browse/GROOVY-8260
> Project: Groovy
> Issue Type: Bug
> Components: Compiler
> Affects Versions: 2.4.12
> Environment: macOS JDK 1.8
> Reporter: James Kleeh
> Assignee: Paul King
> Priority: Major
> Fix For: 2.4.13
>
>
> There are many times I find myself having to cast variables directly inside
> an {{instanceof Class}} check.
> In addition, I have found a specific problem with a generic {{<T extends
> SomeClass>}} where a method in the class that returns {{T}}, Groovy believes
> a collection is being returned. This is the line in question:
> https://github.com/grails/gorm-graphql/blob/ea6887bef0ced75d9cc0d01dc7b94d4fc0520266/core/src/main/groovy/org/grails/gorm/graphql/fetcher/impl/EntityDataFetcher.groovy#L45
> The goal of this issue is to have the following codebase compile without
> changes.
> {{git clone -b broken_compilation https://github.com/grails/gorm-graphql}}
> Attempt to compile with {{./gradlew clean classes}}
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