dgit: quilt linearisation: Stop at debian/source/format changes

Traversing a change of source format will not end well.
Discovered this possibility while investigating #910687.

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

1 files changed, 2 insertions, 1 deletions

diff --git a/dgit b/dgit
index 2f2b509..8cea07b 100755
--- a/dgit
+++ b/dgit
@@ -5503,7 +5503,8 @@ sub quiltify ($$$$) {
 	    printdebug "considering C=$c->{Commit} P=$p->{Commit}\n";
 
 	    my @cmd= (@git, qw(diff-tree -r --name-only),
-		      $p->{Commit},$c->{Commit}, qw(-- debian/patches .pc));
+		      $p->{Commit},$c->{Commit},
+		      qw(-- debian/patches .pc debian/source/format));
 	    my $patchstackchange = cmdoutput @cmd;
 	    if (length $patchstackchange) {
 		$patchstackchange =~ s/\n/,/g;