Added test for #2138.

tests/closure/tfutclosure2138.nim

@@ -0,0 +1,10 @@
+import future, sequtils
+
+proc any[T](list: varargs[T], pred: (T) -> bool): bool =
+    for item in list:
+        if pred(item):
+            result = true
+            break
+
+proc contains(s: string, words: varargs[string]): bool =
+  any(words, (word) => s.contains(word))