Merge branch 'maint'

diff --git a/git-filter-branch.sh b/git-filter-branch.sh
index ac2a005fdb23c48d8451188ffd7b1c8194b0295f..98e8fe43d2fdde1b76e8f10f4c9473e23c8f347c 100755 (executable)
--- a/git-filter-branch.sh
+++ b/git-filter-branch.sh
@@ -283,11 +283,12 @@ while read commit parents; do
 
        case "$filter_subdir" in
        "")
-               git read-tree -i -m $commit
+               GIT_ALLOW_NULL_SHA1=1 git read-tree -i -m $commit
                ;;
        *)
                # The commit may not have the subdirectory at all
-               err=$(git read-tree -i -m $commit:"$filter_subdir" 2>&1) || {
+               err=$(GIT_ALLOW_NULL_SHA1=1 \
+                     git read-tree -i -m $commit:"$filter_subdir" 2>&1) || {
                        if ! git rev-parse -q --verify $commit:"$filter_subdir"
                        then
                                rm -f "$GIT_INDEX_FILE"