do not segfault if make_cache_entry failed

diff --git a/diff-lib.c b/diff-lib.c
index b17722d66a7008b822125bb96ab1b7921e8b627b..ae96c64ca209f4df9008198e8a04b160bed618c7 100644 (file)
--- a/diff-lib.c
+++ b/diff-lib.c
@@ -63,6 +63,8 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
                              ? CE_MATCH_RACY_IS_DIRTY : 0);
        char symcache[PATH_MAX];
 
+       diff_set_mnemonic_prefix(&revs->diffopt, "i/", "w/");
+
        if (diff_unmerged_stage < 0)
                diff_unmerged_stage = 2;
        entries = active_nr;
@@ -171,7 +173,7 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
                        if (silent_on_removed)
                                continue;
                        diff_addremove(&revs->diffopt, '-', ce->ce_mode,
-                                      ce->sha1, ce->name, NULL);
+                                      ce->sha1, ce->name);
                        continue;
                }
                changed = ce_match_stat(ce, &st, ce_option);
@@ -184,7 +186,7 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
                newmode = ce_mode_from_stat(ce, st.st_mode);
                diff_change(&revs->diffopt, oldmode, newmode,
                            ce->sha1, (changed ? null_sha1 : ce->sha1),
-                           ce->name, NULL);
+                           ce->name);
 
        }
        diffcore_std(&revs->diffopt);
@@ -208,7 +210,7 @@ static void diff_index_show_file(struct rev_info *revs,
                                 const unsigned char *sha1, unsigned int mode)
 {
        diff_addremove(&revs->diffopt, prefix[0], mode,
-                      sha1, ce->name, NULL);
+                      sha1, ce->name);
 }
 
 static int get_stat_data(struct cache_entry *ce,
@@ -312,7 +314,7 @@ static int show_modified(struct oneway_unpack_data *cbdata,
                return 0;
 
        diff_change(&revs->diffopt, oldmode, mode,
-                   old->sha1, sha1, old->name, NULL);
+                   old->sha1, sha1, old->name);
        return 0;
 }
 
@@ -469,6 +471,7 @@ int run_diff_index(struct rev_info *revs, int cached)
        if (unpack_trees(1, &t, &opts))
                exit(128);
 
+       diff_set_mnemonic_prefix(&revs->diffopt, "c/", cached ? "i/" : "w/");
        diffcore_std(&revs->diffopt);
        diff_flush(&revs->diffopt);
        return 0;