From 9f3e13ef4d23c96063a14c17b55f07121d889884 Mon Sep 17 00:00:00 2001
From: David Hewitt <1939362+davidhewitt@users.noreply.github.com>
Date: Fri, 17 Jul 2020 18:18:36 +0100
Subject: [PATCH] Fix doc for PyType::from_type_ptr

---
 src/types/typeobject.rs | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/types/typeobject.rs b/src/types/typeobject.rs
index 5b80d39d..beeb2b77 100644
--- a/src/types/typeobject.rs
+++ b/src/types/typeobject.rs
@@ -29,8 +29,10 @@ impl PyType {
     }
 
     /// Retrieves the `PyType` instance for the given FFI pointer.
-    /// This increments the reference count on the type object.
-    /// Undefined behavior if the pointer is NULL or invalid.
+    ///
+    /// # Safety
+    /// - The pointer must be non-null.
+    /// - The pointer must be valid for the entire of the lifetime for which the reference is used.
     #[inline]
     pub unsafe fn from_type_ptr(py: Python, p: *mut ffi::PyTypeObject) -> &PyType {
         py.from_borrowed_ptr(p as *mut ffi::PyObject)