Merge #3131

3131: Extend lifetime of GIL token associated with PyRef(Mut). r=mejrs a=adamreichold



Co-authored-by: Adam Reichold <adam.reichold@t-online.de>

newsfragments/3131.changed.md

@@ -0,0 +1 @@
+Extend the lifetime of the GIL token returned by `PyRef::py` and `PyRefMut::py` to match the underlying borrow.

src/pycell.rs

@@ -583,8 +583,8 @@ pub struct PyRef<'p, T: PyClass> {
 
 impl<'p, T: PyClass> PyRef<'p, T> {
     /// Returns a `Python` token that is bound to the lifetime of the `PyRef`.
-    pub fn py(&self) -> Python<'_> {
-        unsafe { Python::assume_gil_acquired() }
+    pub fn py(&self) -> Python<'p> {
+        self.inner.py()
     }
 }
 
@@ -706,8 +706,8 @@ pub struct PyRefMut<'p, T: PyClass<Frozen = False>> {
 
 impl<'p, T: PyClass<Frozen = False>> PyRefMut<'p, T> {
     /// Returns a `Python` token that is bound to the lifetime of the `PyRefMut`.
-    pub fn py(&self) -> Python<'_> {
-        unsafe { Python::assume_gil_acquired() }
+    pub fn py(&self) -> Python<'p> {
+        self.inner.py()
     }
 }