merge-recursive: don't segfault while handling rename clashes

diff --git a/git-filter-branch.sh b/git-filter-branch.sh
index c106f45af73446d26630030f77107efa520aa296..0897b5971a770755527817d4cb3766d87ce5bebd 100755 (executable)
--- a/git-filter-branch.sh
+++ b/git-filter-branch.sh
@@ -98,7 +98,7 @@ OPTIONS_SPEC=
 . git-sh-setup
 
 if [ "$(is_bare_repository)" = false ]; then
-       git diff-files --quiet &&
+       git diff-files --ignore-submodules --quiet &&
        git diff-index --cached --quiet HEAD -- ||
        die "Cannot rewrite branch(es) with a dirty working directory."
 fi
@@ -442,19 +442,20 @@ rm -rf "$tempdir"
 
 trap - 0
 
+unset GIT_DIR GIT_WORK_TREE GIT_INDEX_FILE
+test -z "$ORIG_GIT_DIR" || {
+       GIT_DIR="$ORIG_GIT_DIR" && export GIT_DIR
+}
+test -z "$ORIG_GIT_WORK_TREE" || {
+       GIT_WORK_TREE="$ORIG_GIT_WORK_TREE" &&
+       export GIT_WORK_TREE
+}
+test -z "$ORIG_GIT_INDEX_FILE" || {
+       GIT_INDEX_FILE="$ORIG_GIT_INDEX_FILE" &&
+       export GIT_INDEX_FILE
+}
+
 if [ "$(is_bare_repository)" = false ]; then
-       unset GIT_DIR GIT_WORK_TREE GIT_INDEX_FILE
-       test -z "$ORIG_GIT_DIR" || {
-               GIT_DIR="$ORIG_GIT_DIR" && export GIT_DIR
-       }
-       test -z "$ORIG_GIT_WORK_TREE" || {
-               GIT_WORK_TREE="$ORIG_GIT_WORK_TREE" &&
-               export GIT_WORK_TREE
-       }
-       test -z "$ORIG_GIT_INDEX_FILE" || {
-               GIT_INDEX_FILE="$ORIG_GIT_INDEX_FILE" &&
-               export GIT_INDEX_FILE
-       }
        git read-tree -u -m HEAD
 fi