From 4c3f8412122f20bac5a8812732b8a5762d0006d6 Mon Sep 17 00:00:00 2001
From: LemonBoy <LemonBoy@users.noreply.github.com>
Date: Wed, 6 Feb 2019 09:14:09 +0100
Subject: [PATCH] Do not raise ProveInit/WanrUninit for .noinit. var (#10566)

---
 compiler/sempass2.nim | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/compiler/sempass2.nim b/compiler/sempass2.nim
index 622e72074b09..bf1b00aa0a88 100644
--- a/compiler/sempass2.nim
+++ b/compiler/sempass2.nim
@@ -232,7 +232,10 @@ proc listGcUnsafety(s: PSym; onlyWarning: bool; conf: ConfigRef) =
 proc useVar(a: PEffects, n: PNode) =
   let s = n.sym
   if isLocalVar(a, s):
-    if s.id notin a.init:
+    if sfNoInit in s.flags:
+      # If the variable is explicitly marked as .noinit. do not emit any error
+      a.init.add s.id
+    elif s.id notin a.init:
       if {tfNeedsInit, tfNotNil} * s.typ.flags != {}:
         message(a.config, n.info, warnProveInit, s.name.s)
       else: