1 files changed, 25 insertions, 0 deletions
diff --git a/Test/dafny4/Bug139.dfy b/Test/dafny4/Bug139.dfy
new file mode 100644
index 00000000..bd4ded73
--- /dev/null
+++ b/Test/dafny4/Bug139.dfy
@@ -0,0 +1,25 @@
+// RUN: %dafny /compile:0  "%s" > "%t"
+// RUN: %diff "%s.expect" "%t"
+
+datatype List = Nil | Cons(int, List)
+
+method R(xs: List)
+{
+  var a: int;
+  var b: int;
+  match xs
+  case Nil =>
+  case Cons(a, Nil()) =>  // this 'a' is allowed
+  case Cons(x, Cons(b, tail)) =>  // this 'b' (which is in a nested position) generates an error
+}
+
+function F(xs: List): int
+{
+  var a := 4;
+  var b := 7;
+  match xs
+  case Nil => 0
+  case Cons(a, Nil()) => 1
+  case Cons(x, Cons(b, tail)) => 2
+}
+