ilPittiz opened a new issue, #14130:
URL: https://github.com/apache/grails-core/issues/14130
### Expected Behavior
I tried to update my app from Grails 6.2.1 to 6.2.3.
Declarations of Groovy closures involving generics were compiled without
errors, e.g.
```
Closure<T> closure = { T obj -> return doSomething(obj) }
```
It seems the breaking change was introduced with Grails 6.2.2.
### Actual Behaviour
`compileGroovy` task on startup fails.
### Steps To Reproduce
1. download example app
2. in `gradle.properties`, grails version is set to 6.2.1
3. boot the app
4. load http://localhost:8080/
5. check the console, output is printed
```
[A, B]
str
```
6. edit `gradle.properties`, uncomment the code to configure Grails to
version 6.2.2
7. reboot the app
8. compilation errors are printed on console:
```
> Task :compileGroovy FAILED
1 actionable task: 1 executed
startup failed:
/Users/Pittiz/github/Grails-generics/src/main/groovy/app/GenericWrapper.groovy:
5: unable to resolve class T
@ line 5, column 31.
private static final Closure<T> noOpClosure = { T v -> return v
}
^
/Users/Pittiz/github/Grails-generics/src/main/groovy/app/GenericWrapper.groovy:
5: unable to resolve class T
@ line 5, column 50.
al Closure<T> noOpClosure = { T v -> ret
^
/Users/Pittiz/github/Grails-generics/src/main/groovy/app/Utils.groovy:
5: unable to resolve class T
@ line 5, column 50.
sure<String> SORT_CLOSURE = { T el -> re
^
3 errors
```
### Environment Information
- MacOS 15.3.2
- JDK 11
### Example Application
https://github.com/ilPittiz/Grails-closure-generics
### Version
6.2.2
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