Make sure to use Context with correct compilationUnit, otherwise source lines would be incorrect

Author: WojciechMazur

compiler/src/dotty/tools/backend/jvm/CodeGen.scala

@@ -45,8 +45,7 @@ class CodeGen(val int: DottyBackendInterface, val primitives: DottyPrimitives)(
 
   private lazy val mirrorCodeGen = Impl.JMirrorBuilder()
 
-  def apply()(using Context): Unit = {
-    val unit = ctx.compilationUnit
+  def gen(unit: CompilationUnit): Unit = {
     val postProcessor = Phases.genBCodePhase match {
       case genBCode: GenBCode => genBCode.postProcessor
       case _ => null

compiler/src/dotty/tools/backend/jvm/DottyBackendInterface.scala

@@ -24,7 +24,7 @@ import StdNames.nme
 import NameKinds.LazyBitMapName
 import Names.Name
 
-class DottyBackendInterface(val outputDirectory: AbstractFile, val superCallsMap: ReadOnlyMap[Symbol, Set[ClassSymbol]])(using val ctx: Context) {
+class DottyBackendInterface(val outputDirectory: AbstractFile, val superCallsMap: ReadOnlyMap[Symbol, Set[ClassSymbol]])(using var ctx: Context) {
 
   private val desugared = new java.util.IdentityHashMap[Type, tpd.Select]
 

compiler/src/dotty/tools/backend/jvm/GenBCode.scala

@@ -104,7 +104,8 @@ class GenBCode extends Phase { self =>
   }
 
   override def run(using Context): Unit =
-    codeGen()
+    backendInterface.ctx = summon[Context]
+    codeGen.gen(ctx.compilationUnit)
 
   override def runOn(units: List[CompilationUnit])(using ctx:Context): List[CompilationUnit] = {
     try 

compiler/src/dotty/tools/backend/jvm/PostProcessorFrontendAccess.scala

@@ -49,7 +49,7 @@ object PostProcessorFrontendAccess {
       extension [T](s: dotty.tools.dotc.config.Settings.Setting[T])
          def valueSetByUser: Option[T] = 
            Option(s.value).filter(_ != s.default)
-      import ctx.{settings as s}
+      def s = ctx.settings
 
       lazy val target =
         val releaseValue = Option(ctx.settings.javaOutputVersion.value).filter(_.nonEmpty)