Better handling of error in inherents logic. (#14521)

* impl

* trigger CI

* Revert "trigger CI"

This reverts commit 9426361416cb051b0507576b010efbc1a6ac65b7.

* Fix

* fix

* fix

* fix

substrate/frame/support/src/lib.rs

@@ -1521,6 +1521,12 @@ pub mod tests {
 	}
 }
 
+/// Private module re-exporting items used by frame support macros.
+#[doc(hidden)]
+pub mod _private {
+	pub use sp_inherents;
+}
+
 /// Prelude to be used for pallet testing, for ease of use.
 #[cfg(feature = "std")]
 pub mod testing_prelude {