From 22d0a3993268c334e62461f39ef02b1d02c64ca1 Mon Sep 17 00:00:00 2001
From: Yuriy Glukhov <yglukhov@users.noreply.github.com>
Date: Tue, 29 Sep 2020 17:55:53 +0300
Subject: [PATCH] Dont assert on setstacksize result in iOS (#15427)
 [backport:1.2]

---
 lib/system/threads.nim | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/system/threads.nim b/lib/system/threads.nim
index bf93b5e01..cd1cf5e29 100644
--- a/lib/system/threads.nim
+++ b/lib/system/threads.nim
@@ -319,7 +319,10 @@ else:
     when hasSharedHeap: t.core.stackSize = ThreadStackSize
     var a {.noinit.}: Pthread_attr
     doAssert pthread_attr_init(a) == 0
-    doAssert pthread_attr_setstacksize(a, ThreadStackSize) == 0
+    let setstacksizeResult = pthread_attr_setstacksize(a, ThreadStackSize)
+    when not defined(ios):
+      # This fails on iOS
+      doAssert(setstacksizeResult == 0)
     if pthread_create(t.sys, a, threadProcWrapper[TArg], addr(t)) != 0:
       raise newException(ResourceExhaustedError, "cannot create thread")
     doAssert pthread_attr_destroy(a) == 0