t1700: add tests for core.splitIndex

diff --git a/ll-merge.c b/ll-merge.c
index 0338630fc2a5378ed33afa828db4940b34aabe82..ad8be42f912b456492ca1704ce067fea4713401a 100644 (file)
--- a/ll-merge.c
+++ b/ll-merge.c
@@ -47,7 +47,9 @@ static int ll_binary_merge(const struct ll_merge_driver *drv_unused,
        assert(opts);
 
        /*
-        * The tentative merge result is the or common ancestor for an internal merge.
+        * The tentative merge result is the common ancestor for an
+        * internal merge.  For the final merge, it is "ours" by
+        * default but -Xours/-Xtheirs can tweak the choice.
         */
        if (opts->virtual_ancestor) {
                stolen = orig;
@@ -205,7 +207,7 @@ static int ll_ext_merge(const struct ll_merge_driver *fn,
        if (fstat(fd, &st))
                goto close_bad;
        result->size = st.st_size;
-       result->ptr = xmalloc(result->size + 1);
+       result->ptr = xmallocz(result->size);
        if (read_in_full(fd, result->ptr, result->size) != result->size) {
                free(result->ptr);
                result->ptr = NULL;
@@ -383,8 +385,12 @@ int ll_merge(mmbuffer_t *result_buf,
                }
        }
        driver = find_ll_merge_driver(ll_driver_name);
-       if (opts->virtual_ancestor && driver->recursive)
-               driver = find_ll_merge_driver(driver->recursive);
+
+       if (opts->virtual_ancestor) {
+               if (driver->recursive)
+                       driver = find_ll_merge_driver(driver->recursive);
+               marker_size += 2;
+       }
        return driver->fn(driver, result_buf, path, ancestor, ancestor_label,
                          ours, our_label, theirs, their_label,
                          opts, marker_size);