From: Jacob Keller <jacob.kel...@gmail.com>

When --reference or --depth are unused, the current git-submodule.sh
results in empty "" arguments appended to the end of the argv array
inside git submodule--helper clone. This is not caught because the argc
count is not checked today.

Fix git-submodule.sh to only pass an argument when --reference or
--depth are used, preventing the addition of two empty string arguments
on the tail of the argv array.

Signed-off-by: Jacob Keller <jacob.kel...@gmail.com>
---
This is a split of a previous patch as suggested by Junio, to make it
easier to review the changes.

 git-submodule.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/git-submodule.sh b/git-submodule.sh
index 9bc5c5f94d1d..2dd29b3df0e6 100755
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -347,7 +347,7 @@ Use -f if you really want to add it." >&2
                                echo "$(eval_gettext "Reactivating local git 
directory for submodule '\$sm_name'.")"
                        fi
                fi
-               git submodule--helper clone ${GIT_QUIET:+--quiet} --prefix 
"$wt_prefix" --path "$sm_path" --name "$sm_name" --url "$realrepo" "$reference" 
"$depth" || exit
+               git submodule--helper clone ${GIT_QUIET:+--quiet} --prefix 
"$wt_prefix" --path "$sm_path" --name "$sm_name" --url "$realrepo" 
${reference:+"$reference"} ${depth:+"$depth"} || exit
                (
                        clear_local_git_env
                        cd "$sm_path" &&
@@ -709,7 +709,7 @@ Maybe you want to use 'update --init'?")"
 
                if ! test -d "$sm_path"/.git && ! test -f "$sm_path"/.git
                then
-                       git submodule--helper clone ${GIT_QUIET:+--quiet} 
--prefix "$prefix" --path "$sm_path" --name "$name" --url "$url" "$reference" 
"$depth" || exit
+                       git submodule--helper clone ${GIT_QUIET:+--quiet} 
--prefix "$prefix" --path "$sm_path" --name "$name" --url "$url" 
${reference:+"$reference"} ${depth:+"$depth"} || exit
                        cloned_modules="$cloned_modules;$name"
                        subsha1=
                else
-- 
2.7.1.429.g45cd78e

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