From 4a03176489b0eb287337c6ad888a4d3b6399f0eb Mon Sep 17 00:00:00 2001
From: Matthias Clasen <mclasen@redhat.com>
Date: Sat, 5 May 2012 18:11:27 -0400
Subject: [PATCH] checkout: Deal gracefully with bad input

I had a /ostree/gnomeos-3.4-i686-devel directory, and this caused
ostree --repo=repo checkout gnomeos-3.5-i686-devel
to segfault.
---
 src/ostree/ot-builtin-checkout.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/ostree/ot-builtin-checkout.c b/src/ostree/ot-builtin-checkout.c
index 57b818c7..4ac817ac 100644
--- a/src/ostree/ot-builtin-checkout.c
+++ b/src/ostree/ot-builtin-checkout.c
@@ -97,6 +97,13 @@ parse_commit_from_symlink (GFile        *symlink,
     goto out;
 
   target = g_file_info_get_symlink_target (file_info);
+  if (target == NULL)
+    {
+      g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
+                   "Not a symbolic link");
+      goto out;
+    }
+
   last_dash = strrchr (target, '-');
   if (last_dash == NULL)
     {