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The following commit(s) were added to refs/heads/main by this push:
new 626f5ee Add -Yfuture-lazy-vals for Scala 3.3.x builds (#307)
626f5ee is described below
commit 626f5ee0d72e860ee7110f9fbd5fb23ea0cf6a65
Author: He-Pin(kerr) <[email protected]>
AuthorDate: Sun Jun 14 20:46:04 2026 +0800
Add -Yfuture-lazy-vals for Scala 3.3.x builds (#307)
* feat: Add -Yfuture-lazy-vals for Scala 3.3.x builds
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
* fix: Add -release:17 required by -Yfuture-lazy-vals
The -Yfuture-lazy-vals flag requires explicit -java-output-version
set to minimum version 9 or higher. Add -release:17 to satisfy
this requirement for Scala 3.3.x builds.
---
build.sbt | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/build.sbt b/build.sbt
index cd4ecf4..a755725 100644
--- a/build.sbt
+++ b/build.sbt
@@ -57,6 +57,10 @@ lazy val root = Project(
"org.hdrhistogram" % "HdrHistogram" % "2.2.2" % Test,
"com.dimafeng" %% "testcontainers-scala-scalatest" %
testcontainersScalaVersion % Test),
scalacOptions ++= Seq("-deprecation", "-feature"),
+ scalacOptions ++= {
+ if (scalaBinaryVersion.value == "3") Seq("-Yfuture-lazy-vals",
"-release:17")
+ else Seq.empty
+ },
Test / parallelExecution := false,
// required by test-containers-scala
Test / fork := true,
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