Do not hide errors when creating container with UserNSRoot

This one is tricky. By using `:=` operator we have made err variable to be local
in the gorutine and different from `err` variable in the surrounding function.
And thus `createContainer` function returned always nil, even in cases when
some error occurred in the gorutine.

Signed-off-by: Šimon Lukašík <slukasik@redhat.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/libpod/oci_linux.go b/libpod/oci_linux.go
index 0447670b3..e6b7cbe4f 100644
--- a/libpod/oci_linux.go
+++ b/libpod/oci_linux.go
@@ -74,7 +74,8 @@ func (r *OCIRuntime) createContainer(ctr *Container, cgroupParent string, restor
 		defer wg.Done()
 		runtime.LockOSThread()
 
-		fd, err := os.Open(fmt.Sprintf("/proc/%d/task/%d/ns/mnt", os.Getpid(), unix.Gettid()))
+		var fd *os.File
+		fd, err = os.Open(fmt.Sprintf("/proc/%d/task/%d/ns/mnt", os.Getpid(), unix.Gettid()))
 		if err != nil {
 			return
 		}