build script fails on j21

[bombcar]

Your GTNH Discord Username

bombcar

Your Pack Version

2.4.2-252

Your Server

SP

Java Version

Java 21

Type of Server

Single Player

Your Expectation

be able to build gt5u on java 21

also happend to Grayduster: https://discord.com/channels/181078474394566657/401118216228831252/1182546813706846329

The Reality

It blows up in spotless - see https://scans.gradle.com/s/vzanrluvsxktc

Apparently this is fixed here diffplug/spotless#1920

BUT build.gradle says

id 'com.diffplug.spotless' version '6.13.0' apply false // 6.13.0 is the last jvm8 supporting version

Your Proposal

Well, I changed it to id 'com.diffplug.spotless' version '6.23.3' apply false // 6.13.0 is the last jvm8 supporting version and it build just fine https://scans.gradle.com/s/zpo4j6ivwfxug

So maybe we deprecate j8 compilation and move spotless forward, or is there a way to swap versions of spotless depending on the compiler?

do we ASM gradle?‽!‽

Final Checklist

• I have searched this issue tracker and there is nothing similar already. Posting on a closed issue saying the bug still exists will prompt us to investigate and reopen it once we confirm your report.
• I can reproduce this problem consistently by follow the exact steps I described above, or this does not need reproducing, e.g. recipe loophole.
• I have asked other people and they confirm they also have this problem by follow the exact steps I described above, or this does not need reproducing, e.g. recipe loophole.