Auto merge of rust-lang#120821 - ehuss:fix-c-str-lit-bootstrap, r=Mark-Simulacrum

[Beta 1.77] Fix bootstrapping from 1.76

Due to the timing of the revert for stabilization of c_str_literal (rust-lang#119528 which reverted in 1.76) and trait_upcasting (rust-lang#120269 which reverted in 1.76), which happened after rust-lang#119211 (Bump stage0 to 1.76 beta), this resulted in some of the feature attributes not being restored which are needed to be able to bootstrap from 1.76. This restores those features.

This also includes a stage0 bump to the just released stable. This is necessary because stage0 was currently pointing at an old beta which did not contain the reverts.

Fixes rust-lang#120810

Author: bors

compiler/rustc_codegen_llvm/src/lib.rs

@@ -8,6 +8,7 @@
 #![feature(rustdoc_internals)]
 #![doc(rust_logo)]
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
+#![cfg_attr(bootstrap, feature(c_str_literals))]
 #![feature(exact_size_is_empty)]
 #![feature(extern_types)]
 #![feature(hash_raw_entry)]

compiler/rustc_lint/src/lib.rs

@@ -34,9 +34,9 @@
 #![feature(if_let_guard)]
 #![feature(iter_order_by)]
 #![feature(let_chains)]
-#![cfg_attr(not(bootstrap), feature(trait_upcasting))]
 #![feature(min_specialization)]
 #![feature(rustc_attrs)]
+#![feature(trait_upcasting)]
 #![deny(rustc::untranslatable_diagnostic)]
 #![deny(rustc::diagnostic_outside_of_impl)]
 #![allow(internal_features)]

compiler/rustc_llvm/src/lib.rs

@@ -1,6 +1,7 @@
 #![deny(rustc::untranslatable_diagnostic)]
 #![deny(rustc::diagnostic_outside_of_impl)]
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
+#![cfg_attr(bootstrap, feature(c_str_literals))]
 #![doc(rust_logo)]
 #![feature(rustdoc_internals)]
 #![allow(internal_features)]

compiler/rustc_middle/src/lib.rs

@@ -48,7 +48,7 @@
 #![feature(associated_type_bounds)]
 #![feature(rustc_attrs)]
 #![feature(control_flow_enum)]
-#![cfg_attr(not(bootstrap), feature(trait_upcasting))]
+#![feature(trait_upcasting)]
 #![feature(try_blocks)]
 #![feature(decl_macro)]
 #![feature(extract_if)]

library/core/tests/lib.rs

@@ -111,7 +111,7 @@
 #![feature(slice_flatten)]
 #![feature(error_generic_member_access)]
 #![feature(error_in_core)]
-#![cfg_attr(not(bootstrap), feature(trait_upcasting))]
+#![feature(trait_upcasting)]
 #![feature(utf8_chunks)]
 #![feature(is_ascii_octdigit)]
 #![feature(get_many_mut)]

library/std/src/lib.rs

@@ -309,6 +309,7 @@
 //
 // Library features (core):
 // tidy-alphabetical-start
+#![cfg_attr(bootstrap, feature(c_str_literals))]
 #![feature(char_internals)]
 #![feature(core_intrinsics)]
 #![feature(core_io_borrowed_buf)]

src/stage0.json

@@ -10,7 +10,7 @@
 #![feature(nonzero_ops)]
 #![feature(let_chains)]
 #![feature(lint_reasons)]
-#![cfg_attr(not(bootstrap), feature(trait_upcasting))]
+#![feature(trait_upcasting)]
 // Configure clippy and other lints
 #![allow(
     clippy::collapsible_else_if,