scala · tgodzik · Nov 5, 2025 · Jul 16, 2025 · Nov 3, 2025 · Jul 16, 2025
diff --git a/compiler/src/dotty/tools/dotc/report.scala b/compiler/src/dotty/tools/dotc/report.scala
@@ -132,8 +132,6 @@ object report:
       case Nil => pos
     recur(pos.sourcePos, tpd.enclosingInlineds)
 
-  private object messageRendering extends MessageRendering
-
   // Should only be called from Run#enrichErrorMessage.
   def enrichErrorMessage(errorMessage: String)(using Context): String =
     if ctx.settings.YnoEnrichErrorMessages.value then errorMessage

diff --git a/compiler/src/dotty/tools/dotc/reporting/MessageRendering.scala b/compiler/src/dotty/tools/dotc/reporting/MessageRendering.scala
@@ -8,6 +8,7 @@ import java.lang.System.{lineSeparator => EOL}
 
 import core.Contexts.*
 import core.Decorators.*
+import io.AbstractFile
 import printing.Highlighting.{Blue, Red, Yellow}
 import printing.SyntaxHighlighting
 import Diagnostic.*
@@ -158,9 +159,12 @@ trait MessageRendering {
       .mkString(EOL)
   }
 
+  // file.path or munge it to normalize for testing
+  protected def renderPath(file: AbstractFile): String = file.path
+
   /** The source file path, line and column numbers from the given SourcePosition */
   protected def posFileStr(pos: SourcePosition): String =
-    val path = pos.source.file.path
+    val path = renderPath(pos.source.file)
     if pos.exists then s"$path:${pos.line + 1}:${pos.column}" else path
 
   /** The separator between errors containing the source file and error type

diff --git a/compiler/test/dotty/tools/dotc/reporting/TestReporter.scala b/compiler/test/dotty/tools/dotc/reporting/TestReporter.scala
@@ -1,12 +1,19 @@
-package dotty.tools
+package dotty
+package tools
 package dotc
 package reporting
 
-import scala.language.unsafeNulls
-import java.io.{BufferedReader, FileInputStream, FileOutputStream, FileReader, PrintStream, PrintWriter, StringReader, StringWriter, File as JFile}
+import java.io.{File as JFile, *}
+import java.nio.file.Files.readAllLines
 import java.text.SimpleDateFormat
 import java.util.Date
+
+import core.Contexts.*
 import core.Decorators.*
+import interfaces.Diagnostic.{ERROR, WARNING}
+import io.AbstractFile
+import util.SourcePosition
+import Diagnostic.*
 
 import scala.collection.mutable
 import scala.jdk.CollectionConverters.*
@@ -29,13 +36,17 @@ extends Reporter with UniqueMessagePositions with HideNonSensicalMessages with M
   final def messages: Iterator[String] = _messageBuf.iterator
 
   protected final val _consoleBuf = new StringWriter
-  protected final val _consoleReporter = new ConsoleReporter(null, new PrintWriter(_consoleBuf))
+  protected final val _consoleReporter = new ConsoleReporter(null, new PrintWriter(_consoleBuf)):
+    override protected def renderPath(file: AbstractFile): String = TestReporter.renderPath(file)
+
   final def consoleOutput: String = _consoleBuf.toString
 
   private var _skip: Boolean = false
   final def setSkip(): Unit = _skip = true
   final def skipped: Boolean = _skip
 
+  override protected def renderPath(file: AbstractFile): String = TestReporter.renderPath(file)
+
   protected final def inlineInfo(pos: SourcePosition)(using Context): String =
     if (pos.exists) {
       if (pos.outer.exists)
@@ -149,10 +160,16 @@ object TestReporter {
       Properties.rerunFailed &&
         failedTestsFile.exists() &&
         failedTestsFile.isFile
-    )(java.nio.file.Files.readAllLines(failedTestsFile.toPath).asScala.toList)
+    )(readAllLines(failedTestsFile.toPath).asScala.toList)
 
   def writeFailedTests(tests: List[String]): Unit =
     initLog()
     tests.foreach(failed => failedTestsWriter.println(failed))
     failedTestsWriter.flush()
+
+  def renderPath(file: AbstractFile): String =
+    if JFile.separatorChar == '\\' then
+      file.path.replace('\\', '/')
+    else
+      file.path
 }
diff --git a/compiler/test/dotty/tools/vulpix/ParallelTesting.scala b/compiler/test/dotty/tools/vulpix/ParallelTesting.scala
@@ -667,7 +667,7 @@ trait ParallelTesting extends RunnerOrchestration:
       checkFile(testSource).foreach(diffTest(testSource, _, reporterOutputLines(reporters), reporters, logger))
 
     private def reporterOutputLines(reporters: Seq[TestReporter]): List[String] =
-      reporters.flatMap(_.consoleOutput.split("\n")).toList
+      reporters.flatMap(_.consoleOutput.linesIterator).toList
 
     private[ParallelTesting] def executeTestSuite(): this.type = {
       assert(testSourcesCompleted == 0, "not allowed to re-use a `CompileRun`")

diff --git a/tests/neg-custom-args/captures/cc-this2.check b/tests/neg-custom-args/captures/cc-this2.check
@@ -1,4 +1,3 @@
-
 -- Error: tests/neg-custom-args/captures/cc-this2/D_2.scala:2:6 --------------------------------------------------------
 2 |class D extends C: // error
   |^

diff --git a/tests/neg-macros/annot-crash.check b/tests/neg-macros/annot-crash.check
@@ -1,4 +1,3 @@
-
 -- Error: tests/neg-macros/annot-crash/Test_2.scala:1:0 ----------------------------------------------------------------
 1 |@crash // error
   |^^^^^^

diff --git a/tests/neg-macros/annot-empty-result.check b/tests/neg-macros/annot-empty-result.check
@@ -1,4 +1,3 @@
-
 -- Error: tests/neg-macros/annot-empty-result/Test_2.scala:5:2 ---------------------------------------------------------
 5 |  @nilAnnot // error
   |  ^^^^^^^^^

diff --git a/tests/neg-macros/annot-error-annot.check b/tests/neg-macros/annot-error-annot.check
@@ -1,4 +1,3 @@
-
 -- Error: tests/neg-macros/annot-error-annot/Test_2.scala:17:6 ---------------------------------------------------------
 16 |@error
 17 |class cGlobal // error

diff --git a/tests/neg-macros/annot-ill-abort.check b/tests/neg-macros/annot-ill-abort.check
@@ -1,4 +1,3 @@
-
 -- Error: tests/neg-macros/annot-ill-abort/Test_2.scala:1:0 ------------------------------------------------------------
 1 |@crash // error
   |^^^^^^

diff --git a/tests/neg-macros/annot-mod-class-add-top-method.check b/tests/neg-macros/annot-mod-class-add-top-method.check
@@ -1,4 +1,3 @@
-
 -- Error: tests/neg-macros/annot-mod-class-add-top-method/Test_2.scala:1:0 ---------------------------------------------
 1 |@addTopLevelMethod // error
   |^^^^^^^^^^^^^^^^^^

diff --git a/tests/neg-macros/annot-mod-class-add-top-val.check b/tests/neg-macros/annot-mod-class-add-top-val.check
@@ -1,4 +1,3 @@
-
 -- Error: tests/neg-macros/annot-mod-class-add-top-val/Test_2.scala:1:0 ------------------------------------------------
 1 |@addTopLevelVal // error
   |^^^^^^^^^^^^^^^

diff --git a/tests/neg-macros/annot-on-type.check b/tests/neg-macros/annot-on-type.check
@@ -1,4 +1,3 @@
-
 -- Error: tests/neg-macros/annot-on-type/Test_2.scala:6:7 --------------------------------------------------------------
 5 |  @voidAnnot
 6 |  type C // error

diff --git a/tests/neg-macros/annot-result-owner.check b/tests/neg-macros/annot-result-owner.check
@@ -1,4 +1,3 @@
-
 -- Error: tests/neg-macros/annot-result-owner/Test_2.scala:1:0 ---------------------------------------------------------
 1 |@insertVal // error
   |^^^^^^^^^^

diff --git a/tests/neg-macros/beta-reduce-inline-result.check b/tests/neg-macros/beta-reduce-inline-result.check
@@ -1,4 +1,3 @@
-
 -- [E007] Type Mismatch Error: tests/neg-macros/beta-reduce-inline-result/Test_2.scala:11:41 ---------------------------
 11 |  val x2: 4   = Macros.betaReduce(dummy1)(3) // error
    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^

diff --git a/tests/neg-macros/delegate-match-1.check b/tests/neg-macros/delegate-match-1.check
@@ -1,4 +1,3 @@
-
 -- Error: tests/neg-macros/delegate-match-1/Test_2.scala:6:2 -----------------------------------------------------------
 6 |  f // error
   |  ^

diff --git a/tests/neg-macros/delegate-match-2.check b/tests/neg-macros/delegate-match-2.check
@@ -1,4 +1,3 @@
-
 -- Error: tests/neg-macros/delegate-match-2/Test_2.scala:5:2 -----------------------------------------------------------
 5 |  f // error
   |  ^

diff --git a/tests/neg-macros/delegate-match-3.check b/tests/neg-macros/delegate-match-3.check
@@ -1,4 +1,3 @@
-
 -- Error: tests/neg-macros/delegate-match-3/Test_2.scala:3:2 -----------------------------------------------------------
 3 |  f // error
   |  ^

diff --git a/tests/neg-macros/i11386.check b/tests/neg-macros/i11386.check
@@ -1,4 +1,3 @@
-
 -- Error: tests/neg-macros/i11386/Test_2.scala:6:10 --------------------------------------------------------------------
 6 |    dummy(0) // error
   |          ^

diff --git a/tests/neg-macros/i13991.check b/tests/neg-macros/i13991.check
@@ -1,4 +1,3 @@
-
 -- Error: tests/neg-macros/i13991/Test_2.scala:6:5 ---------------------------------------------------------------------
 6 |     v2  // error
   |     ^^

diff --git a/tests/neg-macros/i16582.check b/tests/neg-macros/i16582.check
@@ -1,4 +1,3 @@
-
 -- Error: tests/neg-macros/i16582/Test_2.scala:6:27 --------------------------------------------------------------------
 6 |  val o2 = ownerDoesNotWork(2) // error
   |           ^^^^^^^^^^^^^^^^^^^

diff --git a/tests/neg-macros/i16835.check b/tests/neg-macros/i16835.check
@@ -1,4 +1,3 @@
-
 -- Error: tests/neg-macros/i16835/Test_2.scala:1:17 --------------------------------------------------------------------
 1 |def test: Unit = foo // error
   |                 ^^^

diff --git a/tests/neg-macros/i18113.check b/tests/neg-macros/i18113.check
@@ -1,4 +1,3 @@
-
 -- Error: tests/neg-macros/i18113/Test_2.scala:7:8 ---------------------------------------------------------------------
  7 |  X.test(ref) // error
    |  ^^^^^^^^^^^

diff --git a/tests/neg-macros/i18113b.check b/tests/neg-macros/i18113b.check
@@ -1,4 +1,3 @@
-
 -- Error: tests/neg-macros/i18113b/Test_2.scala:7:8 --------------------------------------------------------------------
  7 |  X.test(ref) // error
    |  ^^^^^^^^^^^

diff --git a/tests/neg-macros/i21916.check b/tests/neg-macros/i21916.check
@@ -1,4 +1,3 @@
-
 -- Error: tests/neg-macros/i21916/Test_2.scala:3:27 --------------------------------------------------------------------
 3 |@main def Test = Macro.test() // error
   |                 ^^^^^^^^^^^^

diff --git a/tests/neg-macros/i23008.check b/tests/neg-macros/i23008.check
@@ -1,4 +1,3 @@
-
 -- Error: tests/neg-macros/i23008/Test_2.scala:1:24 --------------------------------------------------------------------
 1 |@main def Test = Macros.buildString // error
   |                 ^^^^^^^^^^^^^^^^^^

diff --git a/tests/neg-macros/i6432.check b/tests/neg-macros/i6432.check
@@ -1,4 +1,3 @@
-
 -- Error: tests/neg-macros/i6432/Test_2.scala:4:6 ----------------------------------------------------------------------
 4 |  foo"abc${"123"}xyz${"456"}fgh" // error // error // error
   |      ^^^

diff --git a/tests/neg-macros/i6432b.check b/tests/neg-macros/i6432b.check
@@ -1,4 +1,3 @@
-
 -- Error: tests/neg-macros/i6432b/Test_2.scala:4:8 ---------------------------------------------------------------------
 4 |  foo"""abc${"123"}xyz${"456"}fgh""" // error // error // error
   |        ^^^

diff --git a/tests/neg-macros/i6976.check b/tests/neg-macros/i6976.check
@@ -1,4 +1,3 @@
-
 -- Error: tests/neg-macros/i6976/Test_2.scala:5:44 ---------------------------------------------------------------------
 5 |  def main(args: Array[String]): Unit = mcr { 2 } // error
   |                                        ^^^^^^^^^

diff --git a/tests/neg-macros/i9014.check b/tests/neg-macros/i9014.check
@@ -1,4 +1,3 @@
-
 -- Error: tests/neg-macros/i9014/Test_2.scala:1:23 ---------------------------------------------------------------------
 1 |val tests = summon[Bar] // error
   |                       ^

diff --git a/tests/neg-macros/i9014b.check b/tests/neg-macros/i9014b.check
@@ -1,4 +1,3 @@
-
 -- [E172] Type Error: tests/neg-macros/i9014b/Test_2.scala:1:23 --------------------------------------------------------
 1 |val tests = summon[Bar] // error
   |                       ^

diff --git a/tests/neg-macros/i9685.check b/tests/neg-macros/i9685.check
@@ -1,4 +1,3 @@
-
 -- [E008] Not Found Error: tests/neg-macros/i9685/Test_2.scala:3:4 -----------------------------------------------------
 3 |  1.asdf // error
   |  ^^^^^^

diff --git a/tests/neg-macros/ill-abort.check b/tests/neg-macros/ill-abort.check
@@ -1,4 +1,3 @@
-
 -- Error: tests/neg-macros/ill-abort/quoted_2.scala:1:15 ---------------------------------------------------------------
 1 |def test = fail() // error
   |           ^^^^^^

diff --git a/tests/neg/i20245.check b/tests/neg/i20245.check
@@ -1,4 +1,3 @@
-
 -- [E046] Cyclic Error: tests/neg/i20245/Typer_2.scala:16:57 -----------------------------------------------------------
 16 |  private[typer] val unification = new Unification(using this) // error
    |                                                         ^

diff --git a/tests/neg/i9408b.check b/tests/neg/i9408b.check
@@ -1,4 +1,3 @@
-
 -- Error: tests/neg/i9408b/Test_2.scala:8:20 ---------------------------------------------------------------------------
 8 |  val length: Int = "abc" // error
   |                    ^^^^^

diff --git a/tests/neg/mixin-forwarder-clash2.check b/tests/neg/mixin-forwarder-clash2.check
@@ -1,4 +1,3 @@
-
 -- [E120] Naming Error: tests/neg/mixin-forwarder-clash2/B_2.scala:1:6 -------------------------------------------------
 1 |class Bar2 extends Bar1 with Two[Foo] // error
   |      ^

diff --git a/tests/neg/yimports-custom.check b/tests/neg/yimports-custom.check
@@ -1,4 +1,3 @@
-
 -- [E006] Not Found Error: tests/neg/yimports-custom/C_2.scala:5:16 ----------------------------------------------------
 5 |  def greet() = println("hello, world!") // error
   |                ^^^^^^^

diff --git a/tests/neg/yimports-stable.check b/tests/neg/yimports-stable.check
@@ -1,4 +1,3 @@
-
 error: bad preamble import hello.world.potions
 -- [E006] Not Found Error: tests/neg/yimports-stable/C_2.scala:4:9 -----------------------------------------------------
 4 |  val v: Numb = magic // error // error

diff --git a/tests/warn/i22795.check b/tests/warn/i22795.check
@@ -1,4 +1,3 @@
-
 -- Deprecation Warning: tests/warn/i22795/test_1.scala:4:7 -------------------------------------------------------------
 4 |  lib.m() // warn
   |  ^^^^^^^