Auto merge of #122754 - Mark-Simulacrum:bootstrap-bump, r=albertlarsan68

Bump to 1.78 bootstrap compiler

https://forge.rust-lang.org/release/process.html#master-bootstrap-update-t-2-day-tuesday

library/alloc/src/alloc.rs

@@ -51,7 +51,7 @@ extern "Rust" {
 #[derive(Copy, Clone, Default, Debug)]
 #[cfg(not(test))]
 // the compiler needs to know when a Box uses the global allocator vs a custom one
-#[cfg_attr(not(bootstrap), lang = "global_alloc_ty")]
+#[lang = "global_alloc_ty"]
 pub struct Global;
 
 #[cfg(test)]
@@ -387,8 +387,7 @@ pub const fn handle_alloc_error(layout: Layout) -> ! {
     }
 
     #[cfg(not(feature = "panic_immediate_abort"))]
-    #[cfg_attr(not(bootstrap), allow(unused_unsafe))] // on bootstrap bump, remove unsafe block
-    unsafe {
+    {
         core::intrinsics::const_eval_select((layout,), ct_error, rt_error)
     }