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-rw-r--r--Test/dafny4/Bug81.dfy9
-rw-r--r--Test/dafny4/Bug81.dfy.expect2
2 files changed, 11 insertions, 0 deletions
diff --git a/Test/dafny4/Bug81.dfy b/Test/dafny4/Bug81.dfy
new file mode 100644
index 00000000..1992d666
--- /dev/null
+++ b/Test/dafny4/Bug81.dfy
@@ -0,0 +1,9 @@
+// RUN: %dafny /compile:0 "%s" > "%t"
+// RUN: %diff "%s.expect" "%t"
+
+function {:opaque} RefineSeqToSeq<T,U>(s:seq<T>, refine_func:T->U) : seq<U>
+ reads refine_func.reads;
+{
+ if |s| == 0 then []
+ else RefineSeqToSeq(s[1..], refine_func)
+}
diff --git a/Test/dafny4/Bug81.dfy.expect b/Test/dafny4/Bug81.dfy.expect
new file mode 100644
index 00000000..069e7767
--- /dev/null
+++ b/Test/dafny4/Bug81.dfy.expect
@@ -0,0 +1,2 @@
+
+Dafny program verifier finished with 2 verified, 0 errors