Octavia Togami created GROOVY-11397:
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Summary: 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: 3.0.21, 3.0.20, 3.0.19, 3.0.18
Reporter: Octavia Togami
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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