Auto merge of #70692 - Centril:rollup-d0t4ecx, r=Centril

Rollup of 8 pull requests

Successful merges:

 - #70281 (Implement Hash for Infallible)
 - #70421 (parse: recover on `const fn()` / `async fn()`)
 - #70615 (Renamed `PerDefTables` to `Tables`)
 - #70631 (Update cargo)
 - #70634 (Remove some reexports in `rustc_middle`)
 - #70658 (add `STILL_FURTHER_SPECIALIZABLE` flag)
 - #70678 (Add missing markdown rust annotation)
 - #70681 (Handle unterminated raw strings with no #s properly)

Failed merges:

r? @ghost

1 files changed, 8 insertions, 0 deletions

diff --git a/src/libcore/convert/mod.rs b/src/libcore/convert/mod.rs
index 47ab8715cfa..eef9ee7cb00 100644
--- a/src/libcore/convert/mod.rs
+++ b/src/libcore/convert/mod.rs
@@ -41,6 +41,7 @@
 #![stable(feature = "rust1", since = "1.0.0")]
 
 use crate::fmt;
+use crate::hash::{Hash, Hasher};
 
 mod num;
 
@@ -746,3 +747,10 @@ impl From<!> for Infallible {
         x
     }
 }
+
+#[stable(feature = "convert_infallible_hash", since = "1.44.0")]
+impl Hash for Infallible {
+    fn hash<H: Hasher>(&self, _: &mut H) {
+        match *self {}
+    }
+}