Compilation error due to seemingly misplaced annotation on class/interface method

[d4span]

I currently get several compilation errors due to seemingly misplaced @NotNull annotations before the return type of certain class/interface methods. For instance, I get a compilation error on the annotation before the return type (Iterable<S>) of the following example method (in a class/interface implementing/extending Spring's CrudRepository):

public <S extends SomeType> @NotNull Iterable<S> saveAll(@NotNull Iterable<S> entities) {
    // implementation goes here
}

However, the same code compiles just fine with OpenJDK 17, e.g. when built with Maven or IntelliJ IDEA.

Environment

• Operating System: Ubuntu Linux 22.04
• JDK version: 17.0.5
• Visual Studio Code version: 1.76.1
• Java extension version: 1.15

[fbricon]

I can't seem to be able to reproduce this issue. Can you provide a sample project demonstrating this issue?

[d4span]

Interestingly, it looks like this error occurs since we added Kotlin to our Maven build (which was at the end of last week). We use the most recent Kotlin version and followed pretty much the documentation here: https://kotlinlang.org/docs/maven.html

Edit 1: When I revert our code to a commit just before the addition of Kotlin, everything works fine again.

Edit 2: I will try to create a sample project that reproduces this error.

[fbricon]

vscode-java doesn't support Kotlin

[d4span]

I see. This might be my fault.

We currently do not have any Kotlin code in our code base, therefore I expected the Java plugin to continue to work (perhaps because I am used to this behavior from other IDEs). But as I mentioned, we changed the Maven build, and if this change is not supported, then you can close this issue.

[rgrunber]

See #531 to track any changes to this.