diff --git a/vendor/code.gitea.io/git/commit.go b/vendor/code.gitea.io/git/commit.go
index 28dd26483..0a95bc90b 100644
--- a/vendor/code.gitea.io/git/commit.go
+++ b/vendor/code.gitea.io/git/commit.go
@@ -235,6 +235,9 @@ func (c *Commit) GetSubModules() (*ObjectCache, error) {
 
 	entry, err := c.GetTreeEntryByPath(".gitmodules")
 	if err != nil {
+		if _, ok := err.(ErrNotExist); ok {
+			return nil, nil
+		}
 		return nil, err
 	}
 	rd, err := entry.Blob().Data()
@@ -273,9 +276,11 @@ func (c *Commit) GetSubModule(entryname string) (*SubModule, error) {
 		return nil, err
 	}
 
-	module, has := modules.Get(entryname)
-	if has {
-		return module.(*SubModule), nil
+	if modules != nil {
+		module, has := modules.Get(entryname)
+		if has {
+			return module.(*SubModule), nil
+		}
 	}
 	return nil, nil
 }
diff --git a/vendor/code.gitea.io/git/tree_entry.go b/vendor/code.gitea.io/git/tree_entry.go
index 4c69002f4..7ea4d211a 100644
--- a/vendor/code.gitea.io/git/tree_entry.go
+++ b/vendor/code.gitea.io/git/tree_entry.go
@@ -264,7 +264,9 @@ func getNextCommitInfos(state *getCommitInfoState) error {
 					return fmt.Errorf("Unquote: %v", err)
 				}
 			}
-			state.update(entryPath)
+			if err = state.update(entryPath); err != nil {
+				return err
+			}
 		}
 		i++ // skip blank line
 		if len(state.entries) == len(state.commits) {
diff --git a/vendor/vendor.json b/vendor/vendor.json
index 773be8a48..17aea9720 100644
--- a/vendor/vendor.json
+++ b/vendor/vendor.json
@@ -3,10 +3,10 @@
 	"ignore": "test appengine",
 	"package": [
 		{
-			"checksumSHA1": "Ve00iavGUw8bQmDeXuEJ51wEk40=",
+			"checksumSHA1": "Ju4zZF8u/DPrZYEEY40rogh3hyQ=",
 			"path": "code.gitea.io/git",
-			"revision": "a34a13dea30c0d242c5256cc321b48f8041ce095",
-			"revisionTime": "2017-06-20T02:08:21Z"
+			"revision": "51eca9e92242b93a0510edd19f1db6fc11ca1028",
+			"revisionTime": "2017-06-21T01:06:07Z"
 		},
 		{
 			"checksumSHA1": "nLhT+bLMj8uLICP+EZbrdoQe6mM=",