Document minor bug

Author: Jentsch

tests/neg/negNamedPatternMatching.check

@@ -26,3 +26,13 @@
 52 |  case User(city = City(name = "Berlin")) => null // error
    |                   ^^^^
    |                   'patterns.City' doesn't support named patterns
+-- Error: tests/neg/negNamedPatternMatching.scala:55:17 ----------------------------------------------------------------
+55 |val User(names = notRecursive) = user // error // error
+   |                 ^^^^^^^^^^^^
+   |                 'names' is unknown
+-- [E045] Cyclic Error: tests/neg/negNamedPatternMatching.scala:55:30 --------------------------------------------------
+55 |val User(names = notRecursive) = user // error // error
+   |                              ^
+   |                              Recursive value notRecursive needs type
+   |
+   | longer explanation available when compiling with `-explain`

tests/neg/negNamedPatternMatching.scala

@@ -49,4 +49,7 @@ val annasCity = user match
     name = "Tom 3" // error
     ) => null
   case User(_, name = "Anna") => null // error
-  case User(city = City(name = "Berlin")) => null // error
+  case User(city = City(name = "Berlin")) => null // error
+
+// TODO: Don't show an error about recursive value
+val User(names = notRecursive) = user // error // error