ADDITIONAL SYSTEM INFORMATION :
debian sid
Linux ws0 5.18.0-3-amd64 #1 SMP PREEMPT_DYNAMIC Debian 5.18.14-1 (2022-07-23) x86_64 GNU/Linux
openjdk version "21.0.2" 2024-01-16
OpenJDK Runtime Environment (build 21.0.2+13-Debian-2)
OpenJDK 64-Bit Server VM (build 21.0.2+13-Debian-2, mixed mode, sharing)


A DESCRIPTION OF THE PROBLEM :
StringTemplate.Processor as parameter of generic lambda causes compilation error.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Source code attached

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
compiled successfuly
ACTUAL -
compilation error: processor type cannot be a raw type: <any>

---------- BEGIN SOURCE ----------
public class ProcessorTest {
    interface Action<T> {
        T act(B b);
    }

    static <T> T with(Action<T> action) {
        return null;
    }

    class B implements StringTemplate.Processor<String, RuntimeException> {
        @Override public String process(StringTemplate stringTemplate) throws RuntimeException {
            return "";
        }
    }

    void test() {
        var x1 = with(b -> {
            // ProcessorTest.java:25: error: processor type cannot be a raw type: <any>
            return b."aaa";
        });

        // workaround
        var x2 = with((B b) -> {
            // ProcessorTest.java:25: error: processor type cannot be a raw type: <any>
            return b."aaa";
        });
    }
}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Typecasting the lambda parameter solves the problem

FREQUENCY : always