Merge pull request #11293 from dotty-staging/asm-9

Upgrade to ASM 9.0

Author: smarter

compiler/src/dotty/tools/backend/jvm/BCodeIdiomatic.scala

@@ -39,6 +39,7 @@ trait BCodeIdiomatic {
       case (None, None) => "8" // least supported version by default
 
 
+  // Keep synchronized with `minTargetVersion` and `maxTargetVersion` in ScalaSettings
   lazy val classfileVersion: Int = target match {
     case "8"  => asm.Opcodes.V1_8
     case "9"  => asm.Opcodes.V9
@@ -48,6 +49,7 @@ trait BCodeIdiomatic {
     case "13" => asm.Opcodes.V13
     case "14" => asm.Opcodes.V14
     case "15" => asm.Opcodes.V15
+    case "16" => asm.Opcodes.V16
   }
 
   lazy val majorVersion: Int = (classfileVersion & 0xFF)

compiler/src/dotty/tools/dotc/config/ScalaSettings.scala

@@ -72,8 +72,9 @@ trait CommonScalaSettings { self: Settings.SettingGroup =>
 }
 
 class ScalaSettings extends Settings.SettingGroup with CommonScalaSettings {
+  // Keep synchronized with `classfileVersion` in `BCodeIdiomatic`
   private val minTargetVersion = 8
-  private val maxTargetVersion = 15
+  private val maxTargetVersion = 16
 
   private def supportedTargetVersions: List[String] =
     (minTargetVersion to maxTargetVersion).toList.map(_.toString)

project/Build.scala

@@ -491,7 +491,7 @@ object Build {
 
       // get libraries onboard
       libraryDependencies ++= Seq(
-        "org.scala-lang.modules" % "scala-asm" % "7.3.1-scala-1", // used by the backend
+        "org.scala-lang.modules" % "scala-asm" % "9.0.0-scala-1", // used by the backend
         Dependencies.oldCompilerInterface, // we stick to the old version to avoid deprecation warnings
         "org.jline" % "jline-reader" % "3.15.0",   // used by the REPL
         "org.jline" % "jline-terminal" % "3.15.0",