Auto merge of #59632 - Centril:rollup, r=Centril

Rollup of 8 pull requests

Successful merges:

 - #59262 (Remove duplicated code from Iterator::{ne, lt, le, gt, ge})
 - #59286 (Refactor async fn return type lowering)
 - #59444 (Implement useful steps_between for all integers)
 - #59452 (Speed up rustdoc run a bit)
 - #59533 (Support allocating iterators with arenas)
 - #59585 (Fixes for shallow borrows)
 - #59607 (Renames `EvalErrorKind` to `InterpError`)
 - #59613 (SGX target: convert a bunch of panics to aborts)

Failed merges:

 - #59630 (Shrink `mir::Statement`.)

r? @ghost

1 files changed, 9 insertions, 0 deletions

diff --git a/src/libstd/sys_common/mod.rs b/src/libstd/sys_common/mod.rs
index 883ab34f07c..4c64e9f3afb 100644
--- a/src/libstd/sys_common/mod.rs
+++ b/src/libstd/sys_common/mod.rs
@@ -28,6 +28,15 @@ macro_rules! rtassert {
     })
 }
 
+#[allow(unused_macros)] // not used on all platforms
+macro_rules! rtunwrap {
+    ($ok:ident, $e:expr) => (if let $ok(v) = $e {
+        v
+    } else {
+        rtabort!(concat!("unwrap failed: ", stringify!($e)));
+    })
+}
+
 pub mod alloc;
 pub mod at_exit_imp;
 #[cfg(feature = "backtrace")]