* More tests.

tests/lang/eval-fail-scope-5.nix

@@ -5,6 +5,6 @@ let {
 
   f = {x ? y, y ? x}: x + y;
 
-  body = f {x = "c";} + f {y = "d";};
+  body = f {};
 
 }

tests/lang/eval-okay-scope-6.exp

@@ -0,0 +1 @@
+Str("ccdd")

tests/lang/eval-okay-scope-6.nix

@@ -0,0 +1,7 @@
+let {
+
+  f = {x ? y, y ? x}: x + y;
+
+  body = f {x = "c";} + f {y = "d";};
+
+}