1 files changed, 4 insertions, 1 deletions
diff --git a/yarn b/yarn
index bb62493..c34ccbb 100755
--- a/yarn
+++ b/yarn
@@ -454,7 +454,10 @@ class YarnRunner(cliapp.Application):
 
     def snapshot_datadir(self, tempdir, datadir, scenario, step_number, step):
         snapshot = self.snapshot_dir(tempdir, scenario, step, step_number)
-        cliapp.runcmd(['cp', '-ax', datadir, snapshot])
+        exit, out, err = cliapp.runcmd_unchecked(
+            ['cp', '-ax', datadir, snapshot])
+        if exit != 0:
+            logging.warning('Snapshot copy failed:\n%s\n%s' % (out, err))
 
     def nice(self, name):
         # Quote a scenario or step name so it forms a nice filename.