From c795a469bcc70f912363f1639a323465e5176f5b Mon Sep 17 00:00:00 2001
From: Araq <rumpf_a@web.de>
Date: Thu, 5 Feb 2015 02:27:43 +0100
Subject: [PATCH] fixes #2011

---
 lib/system.nim | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/system.nim b/lib/system.nim
index 12c5c6303..8948c62a1 100644
--- a/lib/system.nim
+++ b/lib/system.nim
@@ -2194,7 +2194,8 @@ elif hostOS != "standalone":
       inc(i)
   {.pop.}
 
-proc echo*(x: varargs[expr, `$`]) {.magic: "Echo", tags: [WriteIOEffect], benign.}
+proc echo*(x: varargs[expr, `$`]) {.magic: "Echo", tags: [WriteIOEffect],
+  benign, sideEffect.}
   ## Writes and flushes the parameters to the standard output.
   ##
   ## Special built-in that takes a variable number of arguments. Each argument