From eadb5b3786f0127c1e2f05057dd12d0722eeca5b Mon Sep 17 00:00:00 2001
From: friendseeker <66892505+Friendseeker@users.noreply.github.com>
Date: Mon, 1 Jan 2024 19:47:08 -0800
Subject: [PATCH] fix compile error in VirtualFileValueCache

---
 .../src/main/scala/sbt/internal/VirtualFileValueCache.scala | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/main/src/main/scala/sbt/internal/VirtualFileValueCache.scala b/main/src/main/scala/sbt/internal/VirtualFileValueCache.scala
index 2f2c97c0c..1140649e3 100644
--- a/main/src/main/scala/sbt/internal/VirtualFileValueCache.scala
+++ b/main/src/main/scala/sbt/internal/VirtualFileValueCache.scala
@@ -32,8 +32,10 @@ object VirtualFileValueCache {
     }
   }
   def apply[A](converter: FileConverter)(f: VirtualFile => A): VirtualFileValueCache[A] = {
-    import collection.mutable.{ HashMap, Map }
-    val stampCache: Map[VirtualFileRef, (Long, XStamp)] = new HashMap
+    import collection.concurrent.Map
+    import java.util.concurrent.ConcurrentHashMap
+    import scala.collection.JavaConverters._
+    val stampCache: Map[VirtualFileRef, (Long, XStamp)] = new ConcurrentHashMap().asScala
     make(
       Stamper.timeWrap(stampCache, converter, {
         case (vf: VirtualFile) => Stamper.forContentHash(vf)