Auto merge of #109507 - Amanieu:panic-oom-payload, r=davidtwco

Report allocation errors as panics

OOM is now reported as a panic but with a custom payload type (`AllocErrorPanicPayload`) which holds the layout that was passed to `handle_alloc_error`.

This should be review one commit at a time:
- The first commit adds `AllocErrorPanicPayload` and changes allocation errors to always be reported as panics.
- The second commit removes `#[alloc_error_handler]` and the `alloc_error_hook` API.

ACP: https://github.com/rust-lang/libs-team/issues/192

Closes #51540
Closes #51245

1 files changed, 1 insertions, 6 deletions

diff --git a/example/alloc_example.rs b/example/alloc_example.rs
index 4ede2fe4efe..e39c3272958 100644
--- a/example/alloc_example.rs
+++ b/example/alloc_example.rs
@@ -1,4 +1,4 @@
-#![feature(start, core_intrinsics, alloc_error_handler)]
+#![feature(start, core_intrinsics)]
 #![no_std]
 
 extern crate alloc;
@@ -22,11 +22,6 @@ fn panic_handler(_: &core::panic::PanicInfo) -> ! {
     core::intrinsics::abort();
 }
 
-#[alloc_error_handler]
-fn alloc_error_handler(_: alloc::alloc::Layout) -> ! {
-    core::intrinsics::abort();
-}
-
 #[start]
 fn main(_argc: isize, _argv: *const *const u8) -> isize {
     let world: Box<&str> = Box::new("Hello World!\0");