Running ktfmt raises warnings on newer JDKs

[rock3r]

On JDK higher than 21 (not sure how high, but for sure 24 and possibly 23) whenever you run ktfmt the following warnings are emitted:

WARNING: A terminally deprecated method in sun.misc.Unsafe has been called
WARNING: sun.misc.Unsafe::objectFieldOffset has been called by com.intellij.util.containers.ConcurrentLongObjectHashMap (file:/usr/local/lib/ktfmt/ktfmt)
WARNING: Please consider reporting this to the maintainers of class com.intellij.util.containers.ConcurrentLongObjectHashMap
WARNING: sun.misc.Unsafe::objectFieldOffset will be removed in a future release

This trips up some tooling that looks at the output of ktfmt. Could you please address this?

[nreid260]

This isn't coming from ktfmt directly, but rather kotlinc, which is a critical dep. The fix is to update the deps to a version of kotlinc that stops using these methods, whenever such a version exists.

[hick209]

Looks like this param here for the jvm fixes the issue

--sun-misc-unsafe-memory-access=allow

Here's a call example

java --sun-misc-unsafe-memory-access=allow -jar ktfmt-fat.jar @files.txt

[mizoz]

Hi! I'd love to contribute. Could you assign this issue to me?

[mizoz]

Thanks, I'll take a look. I'll first reproduce this on a newer JDK, then check whether this is best handled by dependency updates or by documenting/adding the JVM flag workaround without changing ktfmt output behavior.