From d3b28a5506d7dc1a7474be804483ebd01509ec93 Mon Sep 17 00:00:00 2001
From: Daniel Brotsky <dan@brotsky.com>
Date: Sun, 14 Jul 2024 00:06:23 -0700
Subject: [PATCH] Don't extend from an empty slice.

Fixes kornelski/rust-security-framework#206.
---
 security-framework/src/passwords.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/security-framework/src/passwords.rs b/security-framework/src/passwords.rs
index 75afe9bc..92cd9e5f 100644
--- a/security-framework/src/passwords.rs
+++ b/security-framework/src/passwords.rs
@@ -160,7 +160,9 @@ fn get_password_and_release(data: CFTypeRef) -> Result<Vec<u8>> {
         if type_id == CFData::type_id() {
             let val = unsafe { CFData::wrap_under_create_rule(data as CFDataRef) };
             let mut vec = Vec::new();
-            vec.extend_from_slice(val.bytes());
+            if val.len() > 0 {
+                vec.extend_from_slice(val.bytes());
+            }
             return Ok(vec);
         }
         // unexpected: we got a reference to some other type.