bisect: copy filename string obtained from git_path()

Prevent the string from being overwritten by other callers of
git_path() and friends before we are done using it.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/bisect.c b/bisect.c
index 6e186e29cc4a6a74944798e8c4248219e9c5997f..48acf73391271c1d9061b178a53653357f07f391 100644 (file)
--- a/bisect.c
+++ b/bisect.c
@@ -833,7 +833,7 @@ static int check_ancestors(const char *prefix)
  */
 static void check_good_are_ancestors_of_bad(const char *prefix, int no_checkout)
 {
-       const char *filename = git_path("BISECT_ANCESTORS_OK");
+       char *filename = xstrdup(git_path("BISECT_ANCESTORS_OK"));
        struct stat st;
        int fd;
 
@@ -842,11 +842,11 @@ static void check_good_are_ancestors_of_bad(const char *prefix, int no_checkout)
 
        /* Check if file BISECT_ANCESTORS_OK exists. */
        if (!stat(filename, &st) && S_ISREG(st.st_mode))
-               return;
+               goto done;
 
        /* Bisecting with no good rev is ok. */
        if (good_revs.nr == 0)
-               return;
+               goto done;
 
        /* Check if all good revs are ancestor of the bad rev. */
        if (check_ancestors(prefix))
@@ -859,6 +859,8 @@ static void check_good_are_ancestors_of_bad(const char *prefix, int no_checkout)
                        filename, strerror(errno));
        else
                close(fd);
+ done:
+       free(filename);
 }
 
 /*