From 5edbc20e13e2c35c35d630e9d3b16f85c2d5df3c Mon Sep 17 00:00:00 2001
From: Andreas Rumpf <rumpf_a@web.de>
Date: Mon, 30 May 2016 16:24:46 +0200
Subject: [PATCH] fixes #4238

---
 lib/pure/future.nim | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/lib/pure/future.nim b/lib/pure/future.nim
index 3793edc8bf..4e2c1d8937 100644
--- a/lib/pure/future.nim
+++ b/lib/pure/future.nim
@@ -29,21 +29,17 @@ proc createProcType(p, b: NimNode): NimNode {.compileTime.} =
       of nnkExprColonExpr:
         identDefs.add ident[0]
         identDefs.add ident[1]
-      of nnkIdent:
+      else:
         identDefs.add newIdentNode("i" & $i)
         identDefs.add(ident)
-      else:
-        error("Incorrect type list in proc type declaration.")
       identDefs.add newEmptyNode()
       formalParams.add identDefs
-  of nnkIdent:
+  else:
     var identDefs = newNimNode(nnkIdentDefs)
     identDefs.add newIdentNode("i0")
     identDefs.add(p)
     identDefs.add newEmptyNode()
     formalParams.add identDefs
-  else:
-    error("Incorrect type list in proc type declaration.")
 
   result.add formalParams
   result.add newEmptyNode()