From c5b459a59c1585e44dc9b546f20e835dc3369cc2 Mon Sep 17 00:00:00 2001
From: Seth Tisue <seth@tisue.net>
Date: Thu, 13 Nov 2025 17:14:31 -0600
Subject: [PATCH] Upgrade ASM to 9.9 for JDK 26 support

---
 compiler/src/dotty/tools/backend/jvm/BackendUtils.scala | 3 ++-
 project/Build.scala                                     | 6 +++---
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/compiler/src/dotty/tools/backend/jvm/BackendUtils.scala b/compiler/src/dotty/tools/backend/jvm/BackendUtils.scala
index 653fa3e7bbdb..4322a306f411 100644
--- a/compiler/src/dotty/tools/backend/jvm/BackendUtils.scala
+++ b/compiler/src/dotty/tools/backend/jvm/BackendUtils.scala
@@ -186,6 +186,7 @@ object BackendUtils {
     22 -> asm.Opcodes.V22,
     23 -> asm.Opcodes.V23,
     24 -> asm.Opcodes.V24,
-    25 -> asm.Opcodes.V25
+    25 -> asm.Opcodes.V25,
+    26 -> asm.Opcodes.V26,
   )
 }
diff --git a/project/Build.scala b/project/Build.scala
index cddf225f3475..99b9e6e88719 100644
--- a/project/Build.scala
+++ b/project/Build.scala
@@ -752,7 +752,7 @@ object Build {
 
       // get libraries onboard
       libraryDependencies ++= Seq(
-        "org.scala-lang.modules" % "scala-asm" % "9.8.0-scala-1", // used by the backend
+        "org.scala-lang.modules" % "scala-asm" % "9.9.0-scala-1", // used by the backend
         Dependencies.compilerInterface,
         ("io.get-coursier" %% "coursier" % "2.0.16" % Test).cross(CrossVersion.for3Use2_13),
       ),
@@ -2452,7 +2452,7 @@ object Build {
       // All the dependencies needed by the compiler
       libraryDependencies ++= Seq(
         "com.github.sbt" % "junit-interface" % "0.13.3" % Test,
-        "org.scala-lang.modules" % "scala-asm" % "9.8.0-scala-1",
+        "org.scala-lang.modules" % "scala-asm" % "9.9.0-scala-1",
         Dependencies.compilerInterface,
         ("io.get-coursier" %% "coursier" % "2.0.16" % Test).cross(CrossVersion.for3Use2_13),
       ),
@@ -2601,7 +2601,7 @@ object Build {
       Test / unmanagedResourceDirectories += baseDirectory.value / "test-resources",
       // All the dependencies needed by the compiler
       libraryDependencies ++= Seq(
-        "org.scala-lang.modules" % "scala-asm" % "9.8.0-scala-1",
+        "org.scala-lang.modules" % "scala-asm" % "9.9.0-scala-1",
         Dependencies.compilerInterface,
         "com.github.sbt" % "junit-interface" % "0.13.3" % Test,
         ("io.get-coursier" %% "coursier" % "2.0.16" % Test).cross(CrossVersion.for3Use2_13),