Do not allow fatal errors in fs2

Author: hamzaremmal

community-build/src/scala/dotty/communitybuild/projects.scala

@@ -133,6 +133,11 @@ object projects:
       s"""set $project/Compile/scalacOptions := ($project/Compile/scalacOptions).value.filterNot(opt => opt == "-release" || opt == "8")"""
     ).mkString("; ")
 
+  private def removeFatalWarnings(projects: String*): String =
+    projects.map(project =>
+      s"""set $project/Compile/scalacOptions := ($project/Compile/scalacOptions).value.filterNot(opt => opt == "-Werror" || opt == "-Xfatal-warnings")"""
+    ).mkString("; ")
+
   private def aggregateDoc(in: String)(projects: String*) =
     val tastyFiles =
       (in +: projects).map(p => s"($p/Compile/doc/dotty.tools.sbtplugin.DottyPlugin.autoImport.tastyFiles).value").mkString(" ++ ")
@@ -633,6 +638,7 @@ object projects:
     sbtTestCommand =
       List(
         removeRelease8("coreJVM", "coreJS"), // io/test currently fails JDK9+
+        removeFatalWarnings("coreJVM", "coreJS"),
         "coreJVM/test; coreJS/test;"
       ).mkString("; "),
     sbtPublishCommand = "coreJVM/publishLocal; coreJS/publishLocal",