commit 7f4372f926b6826a883c3160d9398597c6cd488c
author swift-ci <swift-ci@users.noreply.github.com> Thu Sep 14 07:32:32 2017 -0700
committer GitHub <noreply@github.com> Thu Sep 14 07:32:32 2017 -0700
tree cd386de6e3a9682bc18159984015c97269dcca2d
parent 3618f00d7d292767c9df105aa792bbf19a3fff6c
parent 40f392b8b41d9cbaef12cbbcec81029e1a087a36

Merge pull request #1213 from spevans/pr_nsnumber_fixes1

Foundation/URLSession/URLSession.swift

diff --git a/Foundation/URLSession/URLSession.swift b/Foundation/URLSession/URLSession.swift
index 3a07673..7690cc4 100644
--- a/Foundation/URLSession/URLSession.swift
+++ b/Foundation/URLSession/URLSession.swift
@@ -406,9 +406,11 @@
 
 fileprivate extension URLSession {
     func createNextTaskIdentifier() -> Int {
-        let i = nextTaskIdentifier
-        nextTaskIdentifier += 1
-        return i
+        return workQueue.sync {
+            let i = nextTaskIdentifier
+            nextTaskIdentifier += 1
+            return i
+        }
     }
 }