The function is made to use with free_pathspec() because a simple
struct assignment is not enough (free_pathspec wants to free "items"
pointer).

Signed-off-by: Nguyễn Thái Ngọc Duy <pclo...@gmail.com>
---
 builtin/mv.c | 13 +++++++------
 pathspec.c   |  8 ++++++++
 pathspec.h   |  1 +
 3 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/builtin/mv.c b/builtin/mv.c
index 034fec9..16ce99b 100644
--- a/builtin/mv.c
+++ b/builtin/mv.c
@@ -15,8 +15,9 @@ static const char * const builtin_mv_usage[] = {
        NULL
 };
 
-static const char **copy_pathspec(const char *prefix, const char **pathspec,
-                                 int count, int base_name)
+static const char **internal_copy_pathspec(const char *prefix,
+                                          const char **pathspec,
+                                          int count, int base_name)
 {
        int i;
        const char **result = xmalloc((count + 1) * sizeof(const char *));
@@ -81,17 +82,17 @@ int cmd_mv(int argc, const char **argv, const char *prefix)
        if (read_cache() < 0)
                die(_("index file corrupt"));
 
-       source = copy_pathspec(prefix, argv, argc, 0);
+       source = internal_copy_pathspec(prefix, argv, argc, 0);
        modes = xcalloc(argc, sizeof(enum update_mode));
-       dest_path = copy_pathspec(prefix, argv + argc, 1, 0);
+       dest_path = internal_copy_pathspec(prefix, argv + argc, 1, 0);
 
        if (dest_path[0][0] == '\0')
                /* special case: "." was normalized to "" */
-               destination = copy_pathspec(dest_path[0], argv, argc, 1);
+               destination = internal_copy_pathspec(dest_path[0], argv, argc, 
1);
        else if (!lstat(dest_path[0], &st) &&
                        S_ISDIR(st.st_mode)) {
                dest_path[0] = add_slash(dest_path[0]);
-               destination = copy_pathspec(dest_path[0], argv, argc, 1);
+               destination = internal_copy_pathspec(dest_path[0], argv, argc, 
1);
        } else {
                if (argc != 1)
                        die("destination '%s' is not a directory", 
dest_path[0]);
diff --git a/pathspec.c b/pathspec.c
index 94d64d2..ab53b8a 100644
--- a/pathspec.c
+++ b/pathspec.c
@@ -248,3 +248,11 @@ const char **get_pathspec(const char *prefix, const char 
**pathspec)
                return NULL;
        return pathspec;
 }
+
+void copy_pathspec(struct pathspec *dst, const struct pathspec *src)
+{
+       *dst = *src;
+       dst->items = xmalloc(sizeof(struct pathspec_item) * dst->nr);
+       memcpy(dst->items, src->items,
+              sizeof(struct pathspec_item) * dst->nr);
+}
diff --git a/pathspec.h b/pathspec.h
index 7884068..a621676 100644
--- a/pathspec.h
+++ b/pathspec.h
@@ -18,6 +18,7 @@ struct pathspec {
 };
 
 extern int init_pathspec(struct pathspec *, const char **);
+extern void copy_pathspec(struct pathspec *dst, const struct pathspec *src);
 extern void free_pathspec(struct pathspec *);
 
 extern int limit_pathspec_to_literal(void);
-- 
1.8.0.rc0.19.g7bbb31d

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