pkg/progress: work around closing closed channel panic

I could not reproduce the panic in moby#37735, so here's a bandaid. Signed-off-by: Tibor Vass <tibor@docker.com>
erixyuan · Sep 6, 2018 · 7dac703 · 7dac703
1 parent f94eec2
commit 7dac703
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/pkg/progress/progress.go b/pkg/progress/progress.go
@@ -39,6 +39,10 @@ type Output interface {
 type chanOutput chan<- Progress
 
 func (out chanOutput) WriteProgress(p Progress) error {
+	// FIXME: workaround for panic in #37735
+	defer func() {
+		recover()
+	}()
 	out <- p
 	return nil
 }