instanceof pattern inside lambda causes issues.

[biom4st3r]

Using instanceof pattern inside of lambdas breaks multiple features. Examples:

• hovering over elements stops showing the signature
• Renaming from inside the method with the pattern pops an internal error (https://pastebin.com/iTZDjVq0)
• Attempting to Go To Definition of a field or method doesn't work inside the method with the pattern
• Sometime intellisense stops suggesting things

Environment

• Operating System: Windows 10 PRO 1909
• JDK version: Graalvm Java 16 21.1.0
• Visual Studio Code version: 1.59.1(2021-08-19)
• Java extension version: v0.81.0

[Please attach a sample project reproducing the error]

public class Test {
    public static final void bug() {
        Optional.empty().ifPresent(o-> {
            if(o instanceof byte[] array) {
                Object local = null;
            }
        });
    }
}

Please attach logs

https://pastebin.com/iTZDjVq0
https://pastebin.com/bc7rGyfE

Additional Informations

[Nightenom]

Hi, any progress on this? its here 18 months without notice - is this upstream issue?

[datho7561]

Yeah, I think it's an upstream JDT issue. I think AST error recovery when lambdas are present needs to be significantly improved.