From d2b212ae6bc6a1c7ae34fc87296692060cb1a997 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mika=C3=ABl=20Cluseau?= <mcluseau@isi.nc>
Date: Thu, 28 Feb 2019 10:15:35 +1100
Subject: [PATCH] boot-img: better error

---
 cmd/dkl-local-server/boot-img.go | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/cmd/dkl-local-server/boot-img.go b/cmd/dkl-local-server/boot-img.go
index 45c58ff..a8a631f 100644
--- a/cmd/dkl-local-server/boot-img.go
+++ b/cmd/dkl-local-server/boot-img.go
@@ -3,6 +3,7 @@ package main
 import (
 	"archive/tar"
 	"compress/gzip"
+	"fmt"
 	"io"
 	"io/ioutil"
 	"log"
@@ -107,7 +108,7 @@ func setupBootImage(bootImg *os.File, ctx *renderContext) (err error) {
 
 	err = syscall.Mount(dev+"p1", tempDir, "vfat", 0, "")
 	if err != nil {
-		return
+		return fmt.Errorf("failed to mount %s to %s: %v", dev+"p1", tempDir, err)
 	}
 
 	defer func() {