SOE in 2.1.8

[justmin]

import java.util.Map;
import java.util.stream.Collectors;

public class TestCheckerFramework {
    public static String foo(Map<String, String> arg){
        return arg.keySet().stream()
                .map(key -> key)
                .collect(Collectors.joining());
    }
}

Error:java: SourceChecker.typeProcess: unexpected Throwable (StackOverflowError) while processing TestCheckerFramework.java; invoke the compiler with -AprintErrorStack to see the stack trace.

[wmdietlGC]

Thanks for the bug report and sorry for the problem! I've reproduced the issue and have a fix. I'll open a PR soon.

[wmdietlGC]

#1038

[wmdietlGC]

Fixed in aff0922