Print an error message if git crup doesn't run hooks because of an error

git-crup

 #!/bin/bash
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # A convenience script to largely replicate the behavior of `gclient sync` in a
 # submodule-based checkout.  Fetches latest commits for top-level solutions;
 # updates submodules; and runs post-sync hooks.
 
 # Auto-update depot_tools
@@ skipping 121 matching lines @@
    xargs $max_lines -P "$j" "$crup_runner" )
 else 
   ls -d */.git |
   while read gitdir; do
     serial_update "${gitdir%%/.git}"
   done
 fi
 
 status=$?
 
-if [ "$hooks" = "yes" -a "$status" -eq 0 ]; then
+if [ "$status" -ne 0 ]; then
+  cat 1>&2 <<EOF
+Please check the preceding terminal output for error messages.
+Run 'git submodule status' to see the current state of submodule checkouts.
+EOF
+  exit $status
+fi
+
+if [ "$hooks" = "yes" ]; then
   "$runhooks"
   status=$?
 fi
 
 echo
 exit $status