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The following commit(s) were added to refs/heads/main by this push:
new 33b6327b feat: Add -Yfuture-lazy-vals for Scala 3.3.x builds (#522)
33b6327b is described below
commit 33b6327b9035668b62c700754f023443618cbd90
Author: He-Pin(kerr) <[email protected]>
AuthorDate: Sun Jun 14 19:16:07 2026 +0800
feat: Add -Yfuture-lazy-vals for Scala 3.3.x builds (#522)
Motivation:
The Scala 3.3.8 compiler introduced the -Yfuture-lazy-vals flag to
optionally use VarHandle instead of sun.misc.Unsafe for lazy val
implementation. This prepares libraries for upcoming JDK releases
that restrict sun.misc.Unsafe access.
Modification:
Add -Yfuture-lazy-vals to scalacOptions, conditionally applied only
for Scala 3.3.x via CrossVersion.partialVersion or scalaBinaryVersion.
Result:
Scala 3.3.x build uses the future-proof VarHandle-based lazy val
implementation, compatible with all JDK 9+ versions including future
releases that restrict sun.misc.Unsafe.
References:
Refs scala/scala3-lts#637
Refs apache/pekko#3059
---
project/ProjectAutoPlugin.scala | 2 ++
1 file changed, 2 insertions(+)
diff --git a/project/ProjectAutoPlugin.scala b/project/ProjectAutoPlugin.scala
index f81cf5fb..dc530b9f 100644
--- a/project/ProjectAutoPlugin.scala
+++ b/project/ProjectAutoPlugin.scala
@@ -54,6 +54,8 @@ object ProjectAutoPlugin extends AutoPlugin {
(CrossVersion.partialVersion(scalaVersion.value) match {
case Some((2, _)) =>
disciplineScalacOptions
+ case Some((3, _)) =>
+ Set("-Yfuture-lazy-vals")
case _ =>
Nil
}).toSeq,
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