diff --git a/Documentation/RelNotes/1.7.8.txt b/Documentation/RelNotes/1.7.8.txt
index 7626fee8eb..b9bb32492f 100644
--- a/Documentation/RelNotes/1.7.8.txt
+++ b/Documentation/RelNotes/1.7.8.txt
@@ -165,7 +165,7 @@ included in this release.
 
 ---
 exec >/var/tmp/1
-O=v1.7.8-rc1-11-gd7a0129
+O=v1.7.8-rc1-23-gdc865af
 echo O=$(git describe --always master)
 git log --first-parent --oneline --reverse ^$O master
 echo
diff --git a/GIT-VERSION-GEN b/GIT-VERSION-GEN
index cc8a3d27d5..c3435b0c4f 100755
--- a/GIT-VERSION-GEN
+++ b/GIT-VERSION-GEN
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 GVF=GIT-VERSION-FILE
-DEF_VER=v1.7.8-rc1
+DEF_VER=v1.7.8-rc2
 
 LF='
 '
diff --git a/builtin/mktree.c b/builtin/mktree.c
index 098395fda1..4ae1c412d4 100644
--- a/builtin/mktree.c
+++ b/builtin/mktree.c
@@ -60,6 +60,7 @@ static void write_tree(unsigned char *sha1)
 	}
 
 	write_sha1_file(buf.buf, buf.len, tree_type, sha1);
+	strbuf_release(&buf);
 }
 
 static const char *mktree_usage[] = {