diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index b6bcd5cc26..f8d4cb2c7d 100755
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -1837,7 +1837,7 @@ _git_show ()
 		return
 		;;
 	--*)
-		__gitcomp "--pretty= --format=
+		__gitcomp "--pretty= --format= --abbrev-commit --oneline
 			$__git_diff_common_options
 			"
 		return
@@ -1854,7 +1854,7 @@ _git_show_branch ()
 		__gitcomp "
 			--all --remotes --topo-order --current --more=
 			--list --independent --merge-base --no-name
-			--sha1-name --topics --reflog
+			--sha1-name --sparse --topics --reflog
 			"
 		return
 		;;
diff --git a/decorate.c b/decorate.c
index 82d9e221ea..e6fd8a7441 100644
--- a/decorate.c
+++ b/decorate.c
@@ -8,7 +8,9 @@
 
 static unsigned int hash_obj(const struct object *obj, unsigned int n)
 {
-	unsigned int hash = *(unsigned int *)obj->sha1;
+	unsigned int hash;
+
+	memcpy(&hash, obj->sha1, sizeof(unsigned int));
 	return hash % n;
 }
 
diff --git a/dir.c b/dir.c
index 6aae09a22e..0e6b752cd5 100644
--- a/dir.c
+++ b/dir.c
@@ -576,7 +576,7 @@ static int get_dtype(struct dirent *de, const char *path)
  */
 static int read_directory_recursive(struct dir_struct *dir, const char *path, const char *base, int baselen, int check_only, const struct path_simplify *simplify)
 {
-	DIR *fdir = opendir(path);
+	DIR *fdir = opendir(*path ? path : ".");
 	int contents = 0;
 
 	if (fdir) {
diff --git a/object.c b/object.c
index 7e6a92c88e..e1feef9c33 100644
--- a/object.c
+++ b/object.c
@@ -45,7 +45,8 @@ int type_from_string(const char *str)
 
 static unsigned int hash_obj(struct object *obj, unsigned int n)
 {
-	unsigned int hash = *(unsigned int *)obj->sha1;
+	unsigned int hash;
+	memcpy(&hash, obj->sha1, sizeof(unsigned int));
 	return hash % n;
 }