test-lib-functions.sh: rewrite test_seq without Perl

diff --git a/builtin/blame.c b/builtin/blame.c
index ff978253f1fb3d72ff3add9d2718aa3611697b4a..048ed53c2f70961898d3d2a213e05315ae1ac92d 100644 (file)
--- a/builtin/blame.c
+++ b/builtin/blame.c
@@ -28,7 +28,7 @@
 #include "line-log.h"
 #include "dir.h"
 
-static char blame_usage[] = N_("git blame [<options>] [<rev-opts>] [<rev>] [--] file");
+static char blame_usage[] = N_("git blame [<options>] [<rev-opts>] [<rev>] [--] <file>");
 
 static const char *blame_opt_usage[] = {
        blame_usage,
@@ -973,7 +973,10 @@ static void pass_blame_to_parent(struct scoreboard *sb,
        fill_origin_blob(&sb->revs->diffopt, target, &file_o);
        num_get_patch++;
 
-       diff_hunks(&file_p, &file_o, 0, blame_chunk_cb, &d);
+       if (diff_hunks(&file_p, &file_o, 0, blame_chunk_cb, &d))
+               die("unable to generate diff (%s -> %s)",
+                   sha1_to_hex(parent->commit->object.sha1),
+                   sha1_to_hex(target->commit->object.sha1));
        /* The rest are the same as the parent */
        blame_chunk(&d.dstq, &d.srcq, INT_MAX, d.offset, INT_MAX, parent);
        *d.dstq = NULL;
@@ -1119,7 +1122,9 @@ static void find_copy_in_blob(struct scoreboard *sb,
         * file_p partially may match that image.
         */
        memset(split, 0, sizeof(struct blame_entry [3]));
-       diff_hunks(file_p, &file_o, 1, handle_split_cb, &d);
+       if (diff_hunks(file_p, &file_o, 1, handle_split_cb, &d))
+               die("unable to generate diff (%s)",
+                   sha1_to_hex(parent->commit->object.sha1));
        /* remainder, if any, all match the preimage */
        handle_split(sb, ent, d.tlno, d.plno, ent->num_lines, parent, split);
 }