From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Tue, 9 Oct 2018 22:46:25 +0000 (+0100)
Subject: dgit: Avoid crash if branch_is_gdr finds an origin commit
X-Git-Tag: archive/debian/8.0~57
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=dgit.git;a=commitdiff_plain;h=38935cb46dedcb9705b0e5e006280a901279975c;ds=sidebyside

dgit: Avoid crash if branch_is_gdr finds an origin commit

Closes: #910687.
Reported-by: Mattia Rizzolo <mattia@debian.org>
Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---

diff --git a/dgit b/dgit
index 4cc56845..19b9eb2c 100755
--- a/dgit
+++ b/dgit
@@ -379,6 +379,10 @@ sub branch_is_gdr ($) {
 	    printdebug "branch_is_gdr  $walk ?-octopus NO\n";
 	    return 0;
 	}
+	if (!@parents) {
+	    printdebug "branch_is_gdr  $walk origin\n";
+	    return 0;
+	}
 	if ($get_patches->($walk) ne $tip_patches) {
 	    # Our parent added, removed, or edited patches, and wasn't
 	    # a gdr make-patches commit.  gdr make-patches probably