Merge branch 'maint'

* maint:
  am: remove rebase-apply directory before gc
  rerere: fix memory leak if rerere images can't be read
  Documentation: mention conflict marker size argument (%L) for merge driver

Documentation/gitattributes.txt

@@ -511,7 +511,8 @@ command to run to merge ancestor's version (`%O`), current
 version (`%A`) and the other branches' version (`%B`).  These
 three tokens are replaced with the names of temporary files that
 hold the contents of these versions when the command line is
-built.
+built. Additionally, %L will be replaced with the conflict marker
+size (see below).
 
 The merge driver is expected to leave the result of the merge in
 the file named with `%A` by overwriting it, and exit with zero

git-am.sh

@@ -776,6 +776,5 @@ do
 	go_next
 done
 
-git gc --auto
-
 rm -fr "$dotest"
+git gc --auto

rerere.c

@@ -364,7 +364,7 @@ static int find_conflict(struct string_list *conflict)
 static int merge(const char *name, const char *path)
 {
 	int ret;
-	mmfile_t cur, base, other;
+	mmfile_t cur = {NULL, 0}, base = {NULL, 0}, other = {NULL, 0};
 	mmbuffer_t result = {NULL, 0};
 
 	if (handle_file(path, NULL, rerere_path(name, "thisimage")) < 0)
@@ -372,8 +372,10 @@ static int merge(const char *name, const char *path)
 
 	if (read_mmfile(&cur, rerere_path(name, "thisimage")) ||
 			read_mmfile(&base, rerere_path(name, "preimage")) ||
-			read_mmfile(&other, rerere_path(name, "postimage")))
-		return 1;
+			read_mmfile(&other, rerere_path(name, "postimage"))) {
+		ret = 1;
+		goto out;
+	}
 	ret = ll_merge(&result, path, &base, &cur, "", &other, "", 0);
 	if (!ret) {
 		FILE *f = fopen(path, "w");
@@ -387,6 +389,7 @@ static int merge(const char *name, const char *path)
 				     strerror(errno));
 	}
 
+out:
 	free(cur.ptr);
 	free(base.ptr);
 	free(other.ptr);