Split -Wconf combined rules into separate flags for Scala 2.13.15+

baibaichen · baibaichen · commit fd2d6559bd13 · 2026-02-10T13:45:04.000+08:00
Since Scala 2.13.15 (scala/scala#10708), the semantics of combined -Wconf rules changed: in '-Wconf:x,y', y now takes priority over x (last-match-wins), whereas before 2.13.15, x took priority (first-match-wins). This means '-Wconf:cat=deprecation:wv,any:e' now treats deprecation warnings as errors (any:e overrides cat=deprecation:wv), breaking Scala 2.13 compilation when -Pdelta is enabled. Split into separate -Wconf flags where later flags have higher priority: -Wconf:any:e (baseline) -Wconf:msg=While parsing annotations in:silent (override) -Wconf:cat=deprecation:wv (override) This aligns with Apache Spark's approach in SPARK-49746 (983f6f43). Gluten uses Scala 2.13.17 which is affected by this change. Reference: - scala/scala#10708 - apache/spark#48192
diff --git a/pom.xml b/pom.xml
@@ -629,11 +629,12 @@
             </dependencies>
             <recompileMode>${scala.recompile.mode}</recompileMode>
             <args>
-              <arg>-Wconf:msg=While parsing annotations in:silent,any:e</arg>
+              <arg>-Wconf:any:e</arg>
+              <arg>-Wconf:msg=While parsing annotations in:silent</arg>
+              <arg>-Wconf:cat=deprecation:wv</arg>
               <arg>-Ywarn-unused:imports</arg>
               <arg>-deprecation</arg>
               <arg>-feature</arg>
-              <arg>-Wconf:cat=deprecation:wv,any:e</arg>
               <arg>-P:wartremover:traverser:io.github.zhztheplayer.scalawarts.InheritFromCaseClass</arg>
               <arg>-Ybackend-parallelism</arg>
               <arg>8</arg>
@@ -1026,7 +1027,8 @@
                   <arg>-feature</arg>
                   <arg>-explaintypes</arg>
                   <arg>-release:${java.version}</arg>
-                  <arg>-Wconf:cat=deprecation:wv,any:e</arg>
+                  <arg>-Wconf:any:e</arg>
+                  <arg>-Wconf:cat=deprecation:wv</arg>
                   <arg>-Wunused:imports</arg>
                   <!--
                     TODO(SPARK-33805): Undo the corresponding deprecated usage suppression rule after fixed
