Upgrade backend

nicolasstucki · nicolasstucki · commit 7dc9d3555360 · 2017-09-20T10:45:09.000+02:00
Port of scala/scala#6070
diff --git a/scala-backend b/scala-backend
@@ -1 +1 @@
-Subproject commit 2d90208d2189ed8f4b15f5acc4d08fc55a692c6f
+Subproject commit 83b68e5a1fd80afff7f628e813796f5d81a59cc3
