Add output as macro classpath for suspended compilation

Author: nicolasstucki

compiler/src/dotty/tools/dotc/core/MacroClassLoader.scala

@@ -21,6 +21,7 @@ object MacroClassLoader {
 
   private def makeMacroClassLoader(implicit ctx: Context): ClassLoader = trace("new macro class loader") {
     val urls = ctx.settings.classpath.value.split(java.io.File.pathSeparatorChar).map(cp => java.nio.file.Paths.get(cp).toUri.toURL)
-    new java.net.URLClassLoader(urls, getClass.getClassLoader)
+    val out = ctx.settings.outputDir.value.jpath.toUri.toURL // to find classes in case of suspended compilation
+    new java.net.URLClassLoader(urls :+ out, getClass.getClassLoader)
   }
 }

project/scripts/cmdTests

@@ -37,6 +37,10 @@ clear_out "$OUT"
 "$SBT" ";dotc -d $OUT/out.jar $SOURCE; dotc -decompile -classpath $OUT/out.jar -color:never $MAIN" > "$tmp"
 grep -qe "def main(args: scala.Array\[scala.Predef.String\]): scala.Unit =" "$tmp"
 
+echo "testing sbt dotc with suspension"
+clear_out "$OUT"
+"$SBT" "dotc -d $OUT/out.jar tests/pos-macros/macros-in-same-project-1/Bar.scala tests/pos-macros/macros-in-same-project-1/Foo.scala"  > "$tmp"
+
 # check that missing source file does not crash message rendering
 echo "testing that missing source file does not crash message rendering"
 clear_out "$OUT"