Merge pull request #1440 from cramertj/patch-1

Make CppMutRef's T invariant

Author: adetaylor

src/reference_wrapper.rs

@@ -162,7 +162,7 @@ impl<'a, T: ?Sized> CppRef<'a, T> {
     pub fn const_cast(&self) -> CppMutRef<'a, T> {
         CppMutRef {
             ptr: self.ptr as *mut T,
-            phantom: self.phantom,
+            phantom: PhantomData,
         }
     }
 
@@ -230,7 +230,7 @@ impl<T: ?Sized + Unsize<U>, U: ?Sized> DispatchFromDyn<CppRef<'_, U>> for CppRef
 #[repr(transparent)]
 pub struct CppMutRef<'a, T: ?Sized> {
     ptr: *mut T,
-    phantom: PhantomData<&'a T>,
+    phantom: PhantomData<&'a mut T>,
 }
 
 impl<T: ?Sized> CppMutRef<'_, T> {
@@ -296,7 +296,7 @@ impl<'a, T> From<CppMutRef<'a, T>> for CppRef<'a, T> {
     fn from(mutable: CppMutRef<'a, T>) -> Self {
         Self {
             ptr: mutable.ptr,
-            phantom: mutable.phantom,
+            phantom: PhantomData,
         }
     }
 }