From d833b697cbd9e0b743b79242209c78651845f559 Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Mon, 26 Aug 2013 16:36:23 +0100
Subject: [PATCH] Improve error message for non-fast-forward push.  Closes:
 #720896.

---
 debian/changelog | 1 +
 dgit             | 5 ++++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/debian/changelog b/debian/changelog
index d5507459..a30e4690 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -2,6 +2,7 @@ dgit (0.12) unstable; urgency=low
 
   * Cope with packages with epoch.  Closes: #720897.
   * Add Closes line for #720595 to changelog entry for 0.11.
+  * Improve error message for non-fast-forward push.  Closes: #720896.
 
  --
 
diff --git a/dgit b/dgit
index f582be0e..71b04230 100755
--- a/dgit
+++ b/dgit
@@ -984,7 +984,10 @@ sub cmd_push {
 	git_fetch_us();
     }
     if (fetch_from_archive()) {
-	is_fast_fwd(lrref(), 'HEAD') or die;
+	is_fast_fwd(lrref(), 'HEAD') or
+	    fail "dgit push: HEAD is not a descendant".
+	        " of the archive's version.\n".
+		"$us: To overwrite it, use git-merge -s ours ".lrref().".";
     } else {
 	$new_package or
 	    fail "package appears to be new in this suite;".
-- 
2.30.2