git-debrebase: check head is clean before starting

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

diff --git a/git-debrebase b/git-debrebase
index 5913aa3307afa57c0490a44e4765509af6a70024..70808da019922f01d4fb0f77bb5748d1d7647197 100755 (executable)
--- a/git-debrebase
+++ b/git-debrebase
@@ -795,7 +795,10 @@ sub walk ($;$$) {
     return @r
 }
 
-sub get_head () { return git_rev_parse qw(HEAD); }
+sub get_head () {
+    git_check_unmodified();
+    return git_rev_parse qw(HEAD);
+}
 
 sub update_head ($$$) {
     my ($old, $new, $mrest) = @_;
@@ -929,7 +932,6 @@ sub record_ffq_prev () {
 }
 
 sub cmd_new_upstream_v0 () {
-    # tree should be clean and this is not checked
     # automatically and unconditionally launders before rebasing
     # if rebase --abort is used, laundering has still been done