1 files changed, 26 insertions, 0 deletions
diff --git a/Test/dafny0/ExternNegative.dfy b/Test/dafny0/ExternNegative.dfy
new file mode 100644
index 00000000..4ae73232
--- /dev/null
+++ b/Test/dafny0/ExternNegative.dfy
@@ -0,0 +1,26 @@
+// RUN: %dafny /compile:0 /print:"%t.print" /dprint:"%t.dprint" "%s" > "%t"
+// RUN: %diff "%s.expect" "%t"
+extern "Modx" module Mod1 
+{
+  extern "classx" class Class1
+  {
+    extern "Fun1x" static function method Fun1() : int
+      ensures Fun1() > 0
+    extern "Method1x" static method Method1() returns (x: int)
+      ensures x > 0
+    static abstract function method Fun2() : int
+	ensures Fun2() > 0
+    {
+	Fun1()
+    }
+    static static method Method2() returns (x: int)
+      ensures x > 0
+    {
+	x := Method1();
+    }
+  }
+}
+// Will give error about duplicate CompileName for module.
+extern "Modx" module Mod2
+{
+}