Merge from rustc

Author: The Miri Cronjob Bot

.github/workflows/ci.yml

@@ -73,6 +73,15 @@ jobs:
     needs: [ calculate_matrix ]
     runs-on: "${{ matrix.os }}"
     timeout-minutes: 360
+    # The bors environment contains secrets required for elevated workflows (try and auto builds),
+    # which need to access e.g. S3 and upload artifacts. We want to provide access to that
+    # environment only on the try/auto branches, which are only accessible to bors.
+    # This also ensures that PR CI (which doesn't get write access to S3) works, as it cannot
+    # access the environment.
+    #
+    # We only enable the environment for the rust-lang/rust repository, so that rust-lang-ci/rust
+    # CI works until we migrate off it (since that repository doesn't contain the environment).
+    environment: ${{ ((github.repository == 'rust-lang/rust' && (github.ref == 'refs/heads/try' || github.ref == 'refs/heads/auto')) && 'bors') || '' }}
     env:
       CI_JOB_NAME: ${{ matrix.name }}
       CI_JOB_DOC_URL: ${{ matrix.doc_url }}

Cargo.lock

@@ -582,13 +582,11 @@ dependencies = [
 name = "clippy_dev"
 version = "0.0.1"
 dependencies = [
- "aho-corasick",
  "chrono",
  "clap",
  "indoc",
  "itertools",
  "opener",
- "shell-escape",
  "walkdir",
 ]
 
@@ -3809,6 +3807,7 @@ dependencies = [
  "rustc_abi",
  "rustc_ast",
  "rustc_attr_data_structures",
+ "rustc_attr_parsing",
  "rustc_data_structures",
  "rustc_errors",
  "rustc_fluent_macro",
@@ -4887,12 +4886,6 @@ dependencies = [
  "lazy_static",
 ]
 
-[[package]]
-name = "shell-escape"
-version = "0.1.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "45bb67a18fa91266cc7807181f62f9178a6873bfad7dc788c42e6430db40184f"
-
 [[package]]
 name = "shlex"
 version = "1.3.0"

compiler/rustc_attr_parsing/src/attributes/util.rs

@@ -26,3 +26,33 @@ pub fn is_builtin_attr(attr: &impl AttributeExt) -> bool {
 pub fn find_crate_name(attrs: &[impl AttributeExt]) -> Option<Symbol> {
     first_attr_value_str_by_name(attrs, sym::crate_name)
 }
+
+pub fn is_doc_alias_attrs_contain_symbol<'tcx, T: AttributeExt + 'tcx>(
+    attrs: impl Iterator<Item = &'tcx T>,
+    symbol: Symbol,
+) -> bool {
+    let doc_attrs = attrs.filter(|attr| attr.has_name(sym::doc));
+    for attr in doc_attrs {
+        let Some(values) = attr.meta_item_list() else {
+            continue;
+        };
+        let alias_values = values.iter().filter(|v| v.has_name(sym::alias));
+        for v in alias_values {
+            if let Some(nested) = v.meta_item_list() {
+                // #[doc(alias("foo", "bar"))]
+                let mut iter = nested.iter().filter_map(|item| item.lit()).map(|item| item.symbol);
+                if iter.any(|s| s == symbol) {
+                    return true;
+                }
+            } else if let Some(meta) = v.meta_item()
+                && let Some(lit) = meta.name_value_literal()
+            {
+                // #[doc(alias = "foo")]
+                if lit.symbol == symbol {
+                    return true;
+                }
+            }
+        }
+    }
+    false
+}

compiler/rustc_attr_parsing/src/lib.rs

@@ -90,7 +90,9 @@ pub mod parser;
 mod session_diagnostics;
 
 pub use attributes::cfg::*;
-pub use attributes::util::{find_crate_name, is_builtin_attr, parse_version};
+pub use attributes::util::{
+    find_crate_name, is_builtin_attr, is_doc_alias_attrs_contain_symbol, parse_version,
+};
 pub use context::{AttributeParser, OmitDoc};
 
 rustc_fluent_macro::fluent_messages! { "../messages.ftl" }

compiler/rustc_codegen_cranelift/patches/0027-sysroot_tests-128bit-atomic-operations.patch

@@ -17,7 +17,7 @@ index 1e336bf..35e6f54 100644
 @@ -2,5 +2,4 @@
  // tidy-alphabetical-start
 -#![cfg_attr(target_has_atomic = "128", feature(integer_atomics))]
- #![cfg_attr(test, feature(cfg_match))]
+ #![cfg_attr(test, feature(cfg_select))]
  #![feature(alloc_layout_extra)]
  #![feature(array_chunks)]
 diff --git a/coretests/tests/atomic.rs b/coretests/tests/atomic.rs

compiler/rustc_data_structures/src/flock.rs

@@ -4,7 +4,7 @@
 //! green/native threading. This is just a bare-bones enough solution for
 //! librustdoc, it is not production quality at all.
 
-cfg_match! {
+cfg_select! {
     target_os = "linux" => {
         mod linux;
         use linux as imp;

compiler/rustc_data_structures/src/lib.rs

@@ -19,7 +19,7 @@
 #![feature(ascii_char_variants)]
 #![feature(assert_matches)]
 #![feature(auto_traits)]
-#![feature(cfg_match)]
+#![feature(cfg_select)]
 #![feature(core_intrinsics)]
 #![feature(dropck_eyepatch)]
 #![feature(extend_one)]

compiler/rustc_data_structures/src/profiling.rs

@@ -860,7 +860,7 @@ fn get_thread_id() -> u32 {
 }
 
 // Memory reporting
-cfg_match! {
+cfg_select! {
     windows => {
         pub fn get_resident_set_size() -> Option<usize> {
             use windows::{

compiler/rustc_hir_typeck/Cargo.toml

@@ -9,6 +9,7 @@ itertools = "0.12"
 rustc_abi = { path = "../rustc_abi" }
 rustc_ast = { path = "../rustc_ast" }
 rustc_attr_data_structures = { path = "../rustc_attr_data_structures" }
+rustc_attr_parsing = { path = "../rustc_attr_parsing" }
 rustc_data_structures = { path = "../rustc_data_structures" }
 rustc_errors = { path = "../rustc_errors" }
 rustc_fluent_macro = { path = "../rustc_fluent_macro" }

compiler/rustc_hir_typeck/src/coercion.rs

@@ -1190,9 +1190,23 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                     (ty::FnDef(..), ty::FnDef(..)) => {
                         // Don't reify if the function types have a LUB, i.e., they
                         // are the same function and their parameters have a LUB.
-                        match self
-                            .commit_if_ok(|_| self.at(cause, self.param_env).lub(prev_ty, new_ty))
-                        {
+                        match self.commit_if_ok(|_| {
+                            // We need to eagerly handle nested obligations due to lazy norm.
+                            if self.next_trait_solver() {
+                                let ocx = ObligationCtxt::new(self);
+                                let value = ocx.lub(cause, self.param_env, prev_ty, new_ty)?;
+                                if ocx.select_where_possible().is_empty() {
+                                    Ok(InferOk {
+                                        value,
+                                        obligations: ocx.into_pending_obligations(),
+                                    })
+                                } else {
+                                    Err(TypeError::Mismatch)
+                                }
+                            } else {
+                                self.at(cause, self.param_env).lub(prev_ty, new_ty)
+                            }
+                        }) {
                             // We have a LUB of prev_ty and new_ty, just return it.
                             Ok(ok) => return Ok(self.register_infer_ok_obligations(ok)),
                             Err(_) => {