git-debrebase new-upstream: Add a -1 revision if the user didn't supply one.

Closes:#903127.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

1 files changed, 5 insertions, 1 deletions

diff --git a/git-debrebase b/git-debrebase
index 557e789..c28a775 100755
--- a/git-debrebase
+++ b/git-debrebase
@@ -1140,7 +1140,11 @@ sub cmd_new_upstream () {
     badusage "need NEW-VERSION [UPS-COMMITTISH]" unless @ARGV >= 1;
 
     # parse args - low commitment
-    my $new_version = (new Dpkg::Version scalar(shift @ARGV), check => 1);
+    my $spec_version = shift @ARGV;
+    my $new_version = (new Dpkg::Version $spec_version, check => 1);
+    if ($new_version->is_native()) {
+	$new_version = (new Dpkg::Version "$spec_version-1", check => 1);
+    }
     my $new_upstream_version = $new_version->version();
 
     my $new_upstream = shift @ARGV;