--- a/mercurial/scmutil.py	Sun Apr 12 14:24:28 2015 -0400
+++ b/mercurial/scmutil.py	Sun Apr 12 14:26:11 2015 -0400
@@ -177,7 +177,7 @@
     if tui.tracebackflag:
         util.debugstacktrace(msg, 2)
     else:
-        tui.write_err(msg)
+        tui.write_err(msg + '\n')
 
 def filteredhash(repo, maxrev):
     """build hash of filtered revisions in the current repoview.