Merge pull request #5743 from som-snytt/issue/10207-bad-update

SI-10207 Error before update conversion

2 files changed, 20 insertions, 0 deletions

diff --git a/test/files/neg/t10207.check b/test/files/neg/t10207.check
new file mode 100755
index 0000000000..3330db44a5
--- /dev/null
+++ b/test/files/neg/t10207.check
@@ -0,0 +1,4 @@
+t10207.scala:14: error: too many arguments (2) for method apply: (key: Int)scala.collection.mutable.ArrayBuffer[String] in trait MapLike
+  m(1, (_ => empty)) ++= AB("eins", "uno")
+          ^
+one error found
diff --git a/test/files/neg/t10207.scala b/test/files/neg/t10207.scala
new file mode 100644
index 0000000000..2dfc5d75c9
--- /dev/null
+++ b/test/files/neg/t10207.scala
@@ -0,0 +1,16 @@
+
+// Was:
+// warning: an unexpected type representation reached the compiler backend
+// Now:
+// error: too many arguments (2) for method apply: (key: Int)scala.collection.mutable.ArrayBuffer[String] in trait MapLike
+
+trait Test {
+  import collection.mutable.{Map=>MMap, ArrayBuffer=>AB}
+
+  val m = MMap((1 -> AB("one")))
+
+  val empty = AB[String]()
+
+  m(1, (_ => empty)) ++= AB("eins", "uno")
+}
+