git diff head -- test
diff --git a/test/files/presentation/implicit-class-error.check b/test/files/presentation/implicit-class-error.check
new file mode 100644
index 0000000..3418049
--- /dev/null
+++ b/test/files/presentation/implicit-class-error.check
@@ -0,0 +1,7 @@
+reload: Source.scala
+
+askType at Source.scala(6,7)
+================================================================================
+[response] askTypeAt (6,7)
+scala.this.Predef.???
+================================================================================
diff --git a/test/files/presentation/implicit-class-error/Runner.scala b/test/files/presentation/implicit-class-error/Runner.scala
new file mode 100644
index 0000000..0a8923a
--- /dev/null
+++ b/test/files/presentation/implicit-class-error/Runner.scala
@@ -0,0 +1,11 @@
+import scala.tools.nsc.interactive.tests.InteractiveTest
+
+object Test extends InteractiveTest {
+  override def runDefaultTests() {
+    // make sure typer is done.. the virtual pattern matcher might translate
+    // some trees and mess up positions. But we'll catch it red handed!
+    // sourceFiles foreach (src => askLoadedTyped(src).get)
+    super.runDefaultTests()
+  }
+
+}
diff --git a/test/files/presentation/implicit-class-error/src/Source.scala b/test/files/presentation/implicit-class-error/src/Source.scala
new file mode 100644
index 0000000..7438ccc
--- /dev/null
+++ b/test/files/presentation/implicit-class-error/src/Source.scala
@@ -0,0 +1,8 @@
+object Foo {
+  implicit class MatCreator(val ctx: StringContext) extends AnyVal {
+    def m(args: Any*): Unit = {
+      ctx.checkLengths(args)
+    }
+    ???/*?*/
+  }
+}