when clause not working with JDK 21

[ice1000]

public class Test {
  sealed interface I {}
  record A(int a) implements I {}

  public static void main(String[] args) {
    I i = new A(1);
    switch (i) {
      case A(var a) when a == 1 -> System.out.println(a);
      default -> System.out.println("default");
    }
  }
}

After installing the manifold plugin, IntelliJ IDEA can no longer parse the above code:

Environment:

IntelliJ IDEA 2024.1.2 Preview (Ultimate Edition)
Build #IU-241.17011.2, built on May 7, 2024
Licensed to Yinsen Zhang
Subscription is active until January 8, 2025.
For educational use only.
Runtime version: 17.0.11+1-b1207.20 amd64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.
Windows 11.0
GC: G1 Young Generation, G1 Old Generation
Memory: 2010M
Cores: 20
Registry:
  debugger.new.tool.window.layout=true
  ide.experimental.ui=true
  ide.images.show.chessboard=true
Non-Bundled Plugins:
  org.canonical.intellij (1.0)
  PsiViewer (241.14494.158-EAP-SNAPSHOT)
  com.jetbrains.darkPurpleTheme (1.3)
  com.jetbrains.space (241.17011.2)
  manifold.ij (2023.3.27)
  org.jetbrains.idea.grammar (2022.3.2)
  org.ice1000.kala (0.8)
  org.aya.intellij (0.0.1-SNAPSHOT)
  fuck.idea.jpms (SNAPSHOT)
  com.github.copilot (1.5.3.5510)
  com.perl5 (241.13688.18-EAP-SNAPSHOT)
Kotlin: 241.17011.2-IJ

Related report: https://youtrack.jetbrains.com/issue/IDEA-353282/Java-21-syntax-is-no-longer-supported

[ice1000]

@rsmckinney Does this also fix parsing of other new language features? Such as string interpolation and stuffs

[rsmckinney]

Yes, JDK 21 is all covered.

[ice1000]

Thank you! Should I close the issue?