impl std::any::Provider for anyhow::Error

src/error.rs

@@ -522,15 +522,16 @@ impl Error {
             Some(addr.cast::<E>().deref_mut())
         }
     }
+}
 
+#[cfg(backtrace)]
+impl std::any::Provider for Error {
     // Called by thiserror when you have `#[source] anyhow::Error`. This provide
     // implementation includes the anyhow::Error's Backtrace if any, unlike
     // deref'ing to dyn Error where the provide implementation would include
     // only the original error's Backtrace from before it got wrapped into an
     // anyhow::Error.
-    #[cfg(backtrace)]
-    #[doc(hidden)]
-    pub fn provide<'a>(&'a self, demand: &mut Demand<'a>) {
+    fn provide<'a>(&'a self, demand: &mut Demand<'a>) {
         unsafe { ErrorImpl::provide(self.inner.by_ref(), demand) }
     }
 }