SI-8617 Avoid rangepos crash for OptManifest materializer

The tree to create a `NoManifest` was unpositioned.

1 files changed, 10 insertions, 0 deletions

diff --git a/test/files/pos/t8617.scala b/test/files/pos/t8617.scala
new file mode 100644
index 0000000000..fc825bbcba
--- /dev/null
+++ b/test/files/pos/t8617.scala
@@ -0,0 +1,10 @@
+object Test {
+  def foo[A] = implicitly[OptManifest[A]] // was "unpositioned tree" under -Yrangepos
+
+  // These did not crash, but testing for good measure.
+  implicitly[OptManifest[String]]
+  implicitly[Manifest[String]]
+
+  implicitly[reflect.ClassTag[String]]
+  implicitly[reflect.runtime.universe.TypeTag[String]]
+}