1 files changed, 37 insertions, 0 deletions
diff --git a/Test/dafny4/Bug117.dfy b/Test/dafny4/Bug117.dfy
new file mode 100644
index 00000000..418746cb
--- /dev/null
+++ b/Test/dafny4/Bug117.dfy
@@ -0,0 +1,37 @@
+// RUN: %dafny /compile:0  "%s" > "%t"
+// RUN: %diff "%s.expect" "%t"
+
+abstract module AbstractModule1 
+{
+	type AbstractType1
+} 
+
+abstract module AbstractModule2 
+{
+	import opened AM1 : AbstractModule1
+	
+	datatype AbstractType2 = AbstractType2(x:AbstractType1)
+} 
+
+abstract module AbstractModule3 
+{
+	import AM1 : AbstractModule1
+	
+	datatype AbstractType2 = AbstractType2(x:AM1.AbstractType1)
+} 
+
+module ConcreteModule1
+{
+	type AbstractType1 = int
+} 
+
+module ConcreteModule2 refines AbstractModule2 
+{
+	import AM1 = ConcreteModule1 // error: must be declared "opened" to match AbstratctModule2 
+} 
+
+module ConcreteModule3 refines AbstractModule3 
+{
+	import opened AM1 = ConcreteModule1 // error: can't be declared "opened" to match AbstractModule3
+} 
+