1 files changed, 9 insertions, 0 deletions
diff --git a/test/files/neg/t9834.check b/test/files/neg/t9834.check
new file mode 100644
index 0000000000..d07eb7f155
--- /dev/null
+++ b/test/files/neg/t9834.check
@@ -0,0 +1,9 @@
+t9834.scala:5: error: value += is not a member of Int
+  Expression does not convert to assignment because:
+    type mismatch;
+     found   : String
+     required: Int
+    expansion: x.update(x.apply().+("42"))
+  x() += "42"
+      ^
+one error found