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scalac's release in pom.xml #2852

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simonredfern merged 1 commit into from
Jul 3, 2026
+10 −0
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scalac's release in pom.xml #2852

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10 changes: 10 additions & 0 deletions pom.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -178,6 +178,16 @@
<configuration>
<scalaVersion>${scala.compiler}</scalaVersion>
<charset>${project.build.sourceEncoding}</charset>
<!-- Pin scalac's -release independently of ${java.version}. javac needs -release 25
for JDK 25, but the Scala 2.12.21 compiler only accepts -release up to 17 (its
max supported Java API/target). Without this, scala-maven-plugin derives -release
from maven.compiler.target (=${java.version}=25) and passes an unsupported
-release 25 to scalac, failing the build with
"'25' is not a valid choice for '-release'". Scala 2.12 emits Java 8 bytecode
regardless, so this only bounds the visible JDK API surface; the classes still run
on JDK 25. Bump this only when moving to a Scala version that supports a higher
-release. -->
<release>17</release>
<displayCmd>true</displayCmd>
<!-- Optimized JVM settings for faster Scala compilation -->
<jvmArgs>
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