tplimpl: Fix data race in resGetResource

Fixes #3045

diff --git a/tpl/tplimpl/template_resources.go b/tpl/tplimpl/template_resources.go
index 2b3d7120c9c0a7f6584f3c944b48a7d290574e8b..48a79d0661349f6ec629dfd01c426ce23ba803e0 100644 (file)
--- a/tpl/tplimpl/template_resources.go
+++ b/tpl/tplimpl/template_resources.go
@@ -49,8 +49,8 @@ func (l *remoteLock) URLLock(url string) {
        if _, ok := l.m[url]; !ok {
                l.m[url] = &sync.Mutex{}
        }
-       l.Unlock() // call this Unlock before the next lock will be called. NFI why but defer doesn't work.
        l.m[url].Lock()
+       l.Unlock()
 }
 
 // URLUnlock unlocks an URL when the download has been finished. Use only in defer calls.