Auto merge of #121069 - cuviper:beta-next, r=cuviper

[beta] backports

- Correct paths for hexagon-unknown-none-elf platform doc #120533
- CI: Use ninja on apple builders #120543
- Correctly check `never_type` feature gating #120552
- Revert unsound libcore changes of 119911 #120562
- Downgrade xcode #120914
- Update jobserver-rs to 0.1.28 #120846
- [beta] Update LLVM submodule #121132

r? cuviper

Author: bors

.github/workflows/ci.yml

@@ -319,10 +319,10 @@ jobs:
           - name: dist-x86_64-apple
             env:
               SCRIPT: "./x.py dist bootstrap --include-default-paths --host=x86_64-apple-darwin --target=x86_64-apple-darwin"
-              RUST_CONFIGURE_ARGS: "--enable-full-tools --enable-sanitizers --enable-profiler --set rust.jemalloc --set llvm.ninja=false --set rust.lto=thin"
+              RUST_CONFIGURE_ARGS: "--enable-full-tools --enable-sanitizers --enable-profiler --set rust.jemalloc --set rust.lto=thin"
               RUSTC_RETRY_LINKER_ON_SEGFAULT: 1
               MACOSX_DEPLOYMENT_TARGET: 10.12
-              SELECT_XCODE: /Applications/Xcode_13.4.1.app
+              SELECT_XCODE: /Applications/Xcode_14.3.1.app
               NO_LLVM_ASSERTIONS: 1
               NO_DEBUG_ASSERTIONS: 1
               NO_OVERFLOW_CHECKS: 1
@@ -332,42 +332,44 @@ jobs:
           - name: dist-apple-various
             env:
               SCRIPT: "./x.py dist bootstrap --include-default-paths --host='' --target=aarch64-apple-ios,x86_64-apple-ios,aarch64-apple-ios-sim"
-              RUST_CONFIGURE_ARGS: "--enable-sanitizers --enable-profiler --set rust.jemalloc --set llvm.ninja=false"
+              RUST_CONFIGURE_ARGS: "--enable-sanitizers --enable-profiler --set rust.jemalloc"
               RUSTC_RETRY_LINKER_ON_SEGFAULT: 1
               MACOSX_DEPLOYMENT_TARGET: 10.12
-              SELECT_XCODE: /Applications/Xcode_13.4.1.app
+              SELECT_XCODE: /Applications/Xcode_14.3.1.app
               NO_LLVM_ASSERTIONS: 1
               NO_DEBUG_ASSERTIONS: 1
               NO_OVERFLOW_CHECKS: 1
             os: macos-13
           - name: x86_64-apple-1
             env:
               SCRIPT: "./x.py --stage 2 test --skip tests/ui --skip tests/rustdoc --skip tests/run-make-fulldeps"
-              RUST_CONFIGURE_ARGS: "--build=x86_64-apple-darwin --enable-sanitizers --enable-profiler --set rust.jemalloc --set llvm.ninja=false"
+              RUST_CONFIGURE_ARGS: "--build=x86_64-apple-darwin --enable-sanitizers --enable-profiler --set rust.jemalloc"
               RUSTC_RETRY_LINKER_ON_SEGFAULT: 1
               MACOSX_DEPLOYMENT_TARGET: 10.12
               MACOSX_STD_DEPLOYMENT_TARGET: 10.12
+              SELECT_XCODE: /Applications/Xcode_14.3.1.app
               NO_LLVM_ASSERTIONS: 1
               NO_DEBUG_ASSERTIONS: 1
               NO_OVERFLOW_CHECKS: 1
             os: macos-13
           - name: x86_64-apple-2
             env:
               SCRIPT: "./x.py --stage 2 test tests/ui tests/rustdoc tests/run-make-fulldeps"
-              RUST_CONFIGURE_ARGS: "--build=x86_64-apple-darwin --enable-sanitizers --enable-profiler --set rust.jemalloc --set llvm.ninja=false"
+              RUST_CONFIGURE_ARGS: "--build=x86_64-apple-darwin --enable-sanitizers --enable-profiler --set rust.jemalloc"
               RUSTC_RETRY_LINKER_ON_SEGFAULT: 1
               MACOSX_DEPLOYMENT_TARGET: 10.12
               MACOSX_STD_DEPLOYMENT_TARGET: 10.12
+              SELECT_XCODE: /Applications/Xcode_14.3.1.app
               NO_LLVM_ASSERTIONS: 1
               NO_DEBUG_ASSERTIONS: 1
               NO_OVERFLOW_CHECKS: 1
             os: macos-13
           - name: dist-aarch64-apple
             env:
               SCRIPT: "./x.py dist bootstrap --include-default-paths --stage 2"
-              RUST_CONFIGURE_ARGS: "--build=x86_64-apple-darwin --host=aarch64-apple-darwin --target=aarch64-apple-darwin --enable-full-tools --enable-sanitizers --enable-profiler --disable-docs --set rust.jemalloc --set llvm.ninja=false"
+              RUST_CONFIGURE_ARGS: "--build=x86_64-apple-darwin --host=aarch64-apple-darwin --target=aarch64-apple-darwin --enable-full-tools --enable-sanitizers --enable-profiler --disable-docs --set rust.jemalloc"
               RUSTC_RETRY_LINKER_ON_SEGFAULT: 1
-              SELECT_XCODE: /Applications/Xcode_13.4.1.app
+              SELECT_XCODE: /Applications/Xcode_14.3.1.app
               USE_XCODE_CLANG: 1
               MACOSX_DEPLOYMENT_TARGET: 11.0
               MACOSX_STD_DEPLOYMENT_TARGET: 11.0

Cargo.lock

@@ -2090,9 +2090,9 @@ dependencies = [
 
 [[package]]
 name = "jobserver"
-version = "0.1.27"
+version = "0.1.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8c37f63953c4c63420ed5fd3d6d398c719489b9f872b9fa683262f8edd363c7d"
+checksum = "ab46a6e9526ddef3ae7f787c06f0f2600639ba80ea3eade3d8e670a2230f51d6"
 dependencies = [
  "libc",
 ]

compiler/rustc_ast_passes/src/feature_gate.rs

@@ -362,6 +362,19 @@ impl<'a> Visitor<'a> for PostExpansionVisitor<'a> {
         }
     }
 
+    fn visit_generic_args(&mut self, args: &'a ast::GenericArgs) {
+        // This check needs to happen here because the never type can be returned from a function,
+        // but cannot be used in any other context. If this check was in `visit_fn_ret_ty`, it
+        // include both functions and generics like `impl Fn() -> !`.
+        if let ast::GenericArgs::Parenthesized(generic_args) = args
+            && let ast::FnRetTy::Ty(ref ty) = generic_args.output
+            && matches!(ty.kind, ast::TyKind::Never)
+        {
+            gate!(&self, never_type, ty.span, "the `!` type is experimental");
+        }
+        visit::walk_generic_args(self, args);
+    }
+
     fn visit_expr(&mut self, e: &'a ast::Expr) {
         match e.kind {
             ast::ExprKind::TryBlock(_) => {

compiler/rustc_codegen_ssa/Cargo.toml

@@ -9,7 +9,7 @@ ar_archive_writer = "0.1.5"
 bitflags = "2.4.1"
 cc = "1.0.69"
 itertools = "0.11"
-jobserver = "0.1.27"
+jobserver = "0.1.28"
 pathdiff = "0.2.0"
 regex = "1.4"
 rustc_arena = { path = "../rustc_arena" }

compiler/rustc_data_structures/Cargo.toml

@@ -11,7 +11,7 @@ either = "1.0"
 elsa = "=1.7.1"
 ena = "0.14.2"
 indexmap = { version = "2.0.0" }
-jobserver_crate = { version = "0.1.27", package = "jobserver" }
+jobserver_crate = { version = "0.1.28", package = "jobserver" }
 libc = "0.2"
 measureme = "11"
 rustc-hash = "1.1.0"

compiler/rustc_data_structures/src/jobserver.rs

@@ -23,7 +23,10 @@ static GLOBAL_CLIENT: LazyLock<Result<Client, String>> = LazyLock::new(|| {
 
     if matches!(
         error.kind(),
-        FromEnvErrorKind::NoEnvVar | FromEnvErrorKind::NoJobserver | FromEnvErrorKind::Unsupported
+        FromEnvErrorKind::NoEnvVar
+            | FromEnvErrorKind::NoJobserver
+            | FromEnvErrorKind::NegativeFd
+            | FromEnvErrorKind::Unsupported
     ) {
         return Ok(default_client());
     }

library/core/src/lib.rs

@@ -200,7 +200,6 @@
 //
 // Language features:
 // tidy-alphabetical-start
-#![cfg_attr(not(bootstrap), feature(is_val_statically_known))]
 #![feature(abi_unadjusted)]
 #![feature(adt_const_params)]
 #![feature(allow_internal_unsafe)]