Rollup of 9 pull requests

.github/workflows/ci.yml

@@ -20,6 +20,7 @@ name: CI
     branches:
       - auto
       - try
+      - try-perf
       - master
   pull_request:
     branches:
@@ -146,7 +147,7 @@ jobs:
       CACHES_AWS_ACCESS_KEY_ID: AKIA46X5W6CZI5DHEBFL
       ARTIFACTS_AWS_ACCESS_KEY_ID: AKIA46X5W6CZN24CBO55
       CACHE_DOMAIN: ci-caches.rust-lang.org
-    if: "github.event_name == 'push' && github.ref == 'refs/heads/try' && github.repository == 'rust-lang-ci/rust'"
+    if: "github.event_name == 'push' && (github.ref == 'refs/heads/try' || github.ref == 'refs/heads/try-perf') && github.repository == 'rust-lang-ci/rust'"
     strategy:
       matrix:
         include:
@@ -717,7 +718,7 @@ jobs:
   try-success:
     needs:
       - try
-    if: "success() && github.event_name == 'push' && github.ref == 'refs/heads/try' && github.repository == 'rust-lang-ci/rust'"
+    if: "success() && github.event_name == 'push' && (github.ref == 'refs/heads/try' || github.ref == 'refs/heads/try-perf') && github.repository == 'rust-lang-ci/rust'"
     steps:
       - name: mark the job as a success
         run: exit 0
@@ -727,7 +728,7 @@ jobs:
   try-failure:
     needs:
       - try
-    if: "!success() && github.event_name == 'push' && github.ref == 'refs/heads/try' && github.repository == 'rust-lang-ci/rust'"
+    if: "!success() && github.event_name == 'push' && (github.ref == 'refs/heads/try' || github.ref == 'refs/heads/try-perf') && github.repository == 'rust-lang-ci/rust'"
     steps:
       - name: mark the job as a failure
         run: exit 1

Cargo.lock

@@ -412,9 +412,9 @@ version = "0.1.0"
 
 [[package]]
 name = "cc"
-version = "1.0.57"
+version = "1.0.58"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0fde55d2a2bfaa4c9668bbc63f531fbdeee3ffe188f4662511ce2c22b3eedebe"
+checksum = "f9a06fb2e53271d7c279ec1efea6ab691c35a2ae67ec0d91d7acec0caf13b518"
 dependencies = [
  "jobserver",
 ]
@@ -1576,9 +1576,9 @@ checksum = "b294d6fa9ee409a054354afc4352b0b9ef7ca222c69b8812cbea9e7d2bf3783f"
 
 [[package]]
 name = "libc"
-version = "0.2.71"
+version = "0.2.73"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9457b06509d27052635f90d6466700c65095fdf75409b3fbdd903e988b886f49"
+checksum = "bd7d4bd64732af4bf3a67f367c27df8520ad7e230c5817b8ff485864d80242b9"
 dependencies = [
  "rustc-std-workspace-core",
 ]

src/build_helper/lib.rs

@@ -1,3 +1,5 @@
+use std::ffi::{OsStr, OsString};
+use std::fmt::Display;
 use std::path::{Path, PathBuf};
 use std::process::{Command, Stdio};
 use std::time::{SystemTime, UNIX_EPOCH};
@@ -28,6 +30,14 @@ macro_rules! t {
     };
 }
 
+/// Reads an environment variable and adds it to dependencies.
+/// Supposed to be used for all variables except those set for build scripts by cargo
+/// https://doc.rust-lang.org/cargo/reference/environment-variables.html#environment-variables-cargo-sets-for-build-scripts
+pub fn tracked_env_var_os<K: AsRef<OsStr> + Display>(key: K) -> Option<OsString> {
+    println!("cargo:rerun-if-env-changed={}", key);
+    env::var_os(key)
+}
+
 // Because Cargo adds the compiler's dylib path to our library search path, llvm-config may
 // break: the dylib path for the compiler, as of this writing, contains a copy of the LLVM
 // shared library, which means that when our freshly built llvm-config goes to load it's
@@ -37,10 +47,8 @@ macro_rules! t {
 // perfect -- we might actually want to see something from Cargo's added library paths -- but
 // for now it works.
 pub fn restore_library_path() {
-    println!("cargo:rerun-if-env-changed=REAL_LIBRARY_PATH_VAR");
-    println!("cargo:rerun-if-env-changed=REAL_LIBRARY_PATH");
-    let key = env::var_os("REAL_LIBRARY_PATH_VAR").expect("REAL_LIBRARY_PATH_VAR");
-    if let Some(env) = env::var_os("REAL_LIBRARY_PATH") {
+    let key = tracked_env_var_os("REAL_LIBRARY_PATH_VAR").expect("REAL_LIBRARY_PATH_VAR");
+    if let Some(env) = tracked_env_var_os("REAL_LIBRARY_PATH") {
         env::set_var(&key, &env);
     } else {
         env::remove_var(&key);

src/ci/github-actions/ci.yml

@@ -247,6 +247,7 @@ on:
     branches:
       - auto
       - try
+      - try-perf
       - master
   pull_request:
     branches:
@@ -285,7 +286,7 @@ jobs:
     name: try
     env:
       <<: [*shared-ci-variables, *prod-variables]
-    if: github.event_name == 'push' && github.ref == 'refs/heads/try' && github.repository == 'rust-lang-ci/rust'
+    if: github.event_name == 'push' && (github.ref == 'refs/heads/try' || github.ref == 'refs/heads/try-perf') && github.repository == 'rust-lang-ci/rust'
     strategy:
       matrix:
         include:
@@ -645,11 +646,11 @@ jobs:
   # successful listening to webhooks only.
   try-success:
     needs: [try]
-    if: "success() && github.event_name == 'push' && github.ref == 'refs/heads/try' && github.repository == 'rust-lang-ci/rust'"
+    if: "success() && github.event_name == 'push' && (github.ref == 'refs/heads/try' || github.ref == 'refs/heads/try-perf') && github.repository == 'rust-lang-ci/rust'"
     <<: *base-success-job
   try-failure:
     needs: [try]
-    if: "!success() && github.event_name == 'push' && github.ref == 'refs/heads/try' && github.repository == 'rust-lang-ci/rust'"
+    if: "!success() && github.event_name == 'push' && (github.ref == 'refs/heads/try' || github.ref == 'refs/heads/try-perf') && github.repository == 'rust-lang-ci/rust'"
     <<: *base-failure-job
   auto-success:
     needs: [auto]

src/libprofiler_builtins/Cargo.toml

@@ -1,6 +1,5 @@
 [package]
 authors = ["The Rust Project Developers"]
-build = "build.rs"
 name = "profiler_builtins"
 version = "0.0.0"
 edition = "2018"

src/libprofiler_builtins/build.rs

@@ -9,6 +9,8 @@ fn main() {
     let target = env::var("TARGET").expect("TARGET was not set");
     let cfg = &mut cc::Build::new();
 
+    // FIXME: `rerun-if-changed` directives are not currently emitted and the build script
+    // will not rerun on changes in these source files or headers included into them.
     let mut profile_sources = vec![
         "GCDAProfiling.c",
         "InstrProfiling.c",

src/librustc_attr/Cargo.toml

@@ -3,7 +3,6 @@ authors = ["The Rust Project Developers"]
 name = "rustc_attr"
 version = "0.0.0"
 edition = "2018"
-build = "build.rs"
 
 [lib]
 name = "rustc_attr"

src/librustc_codegen_ssa/back/link.rs

@@ -1598,7 +1598,9 @@ fn linker_with_args<'a, B: ArchiveBuilder<'a>>(
     }
 
     // NO-OPT-OUT, OBJECT-FILES-NO, AUDIT-ORDER
-    cmd.add_eh_frame_header();
+    if sess.target.target.options.eh_frame_header {
+        cmd.add_eh_frame_header();
+    }
 
     // NO-OPT-OUT, OBJECT-FILES-NO
     if crt_objects_fallback {

src/librustc_codegen_ssa/back/linker.rs

@@ -619,13 +619,7 @@ impl<'a> Linker for GccLinker<'a> {
     // Some versions of `gcc` add it implicitly, some (e.g. `musl-gcc`) don't,
     // so we just always add it.
     fn add_eh_frame_header(&mut self) {
-        if !self.sess.target.target.options.is_like_osx
-            && !self.sess.target.target.options.is_like_windows
-            && !self.sess.target.target.options.is_like_solaris
-            && self.sess.target.target.target_os != "uefi"
-        {
-            self.linker_arg("--eh-frame-hdr");
-        }
+        self.linker_arg("--eh-frame-hdr");
     }
 }
 

src/librustc_error_codes/error_codes.rs

@@ -633,4 +633,5 @@ E0771: include_str!("./error_codes/E0771.md"),
     E0755, // `#[ffi_pure]` is only allowed on foreign functions
     E0756, // `#[ffi_const]` is only allowed on foreign functions
     E0757, // `#[ffi_const]` functions cannot be `#[ffi_pure]`
+    E0772, // `'static' obligation coming from `impl dyn Trait {}` or `impl Foo for dyn Bar {}`.
 }

src/librustc_feature/accepted.rs

@@ -262,9 +262,9 @@ declare_features! (
     /// Allows using subslice patterns, `[a, .., b]` and `[a, xs @ .., b]`.
     (accepted, slice_patterns, "1.42.0", Some(62254), None),
     /// Allows the use of `if` and `match` in constants.
-    (accepted, const_if_match, "1.45.0", Some(49146), None),
+    (accepted, const_if_match, "1.46.0", Some(49146), None),
     /// Allows the use of `loop` and `while` in constants.
-    (accepted, const_loop, "1.45.0", Some(52000), None),
+    (accepted, const_loop, "1.46.0", Some(52000), None),
     /// Allows `#[track_caller]` to be used which provides
     /// accurate caller location reporting during panic (RFC 2091).
     (accepted, track_caller, "1.46.0", Some(47809), None),

src/librustc_hir/hir.rs

@@ -2198,7 +2198,17 @@ pub enum IsAsync {
     NotAsync,
 }
 
-#[derive(Copy, Clone, PartialEq, RustcEncodable, RustcDecodable, Debug, HashStable_Generic)]
+#[derive(
+    Copy,
+    Clone,
+    PartialEq,
+    RustcEncodable,
+    RustcDecodable,
+    Debug,
+    HashStable_Generic,
+    Eq,
+    Hash
+)]
 pub enum Defaultness {
     Default { has_value: bool },
     Final,

src/librustc_infer/infer/combine.rs

@@ -36,12 +36,13 @@ use crate::traits::{Obligation, PredicateObligations};
 
 use rustc_ast::ast;
 use rustc_hir::def_id::DefId;
+use rustc_middle::traits::ObligationCause;
 use rustc_middle::ty::error::TypeError;
 use rustc_middle::ty::relate::{self, Relate, RelateResult, TypeRelation};
 use rustc_middle::ty::subst::SubstsRef;
 use rustc_middle::ty::{self, InferConst, ToPredicate, Ty, TyCtxt, TypeFoldable};
 use rustc_middle::ty::{IntType, UintType};
-use rustc_span::{Span, DUMMY_SP};
+use rustc_span::DUMMY_SP;
 
 #[derive(Clone)]
 pub struct CombineFields<'infcx, 'tcx> {
@@ -367,10 +368,11 @@ impl<'infcx, 'tcx> CombineFields<'infcx, 'tcx> {
         };
 
         debug!("generalize: for_universe = {:?}", for_universe);
+        debug!("generalize: trace = {:?}", self.trace);
 
         let mut generalize = Generalizer {
             infcx: self.infcx,
-            span: self.trace.cause.span,
+            cause: &self.trace.cause,
             for_vid_sub_root: self.infcx.inner.borrow_mut().type_variables().sub_root_var(for_vid),
             for_universe,
             ambient_variance,
@@ -414,7 +416,7 @@ struct Generalizer<'cx, 'tcx> {
     infcx: &'cx InferCtxt<'cx, 'tcx>,
 
     /// The span, used when creating new type variables and things.
-    span: Span,
+    cause: &'cx ObligationCause<'tcx>,
 
     /// The vid of the type variable that is in the process of being
     /// instantiated; if we find this within the type we are folding,
@@ -639,7 +641,7 @@ impl TypeRelation<'tcx> for Generalizer<'_, 'tcx> {
 
         // FIXME: This is non-ideal because we don't give a
         // very descriptive origin for this region variable.
-        Ok(self.infcx.next_region_var_in_universe(MiscVariable(self.span), self.for_universe))
+        Ok(self.infcx.next_region_var_in_universe(MiscVariable(self.cause.span), self.for_universe))
     }
 
     fn consts(

src/librustc_infer/infer/error_reporting/mod.rs

@@ -2010,7 +2010,7 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
             infer::MiscVariable(_) => String::new(),
             infer::PatternRegion(_) => " for pattern".to_string(),
             infer::AddrOfRegion(_) => " for borrow expression".to_string(),
-            infer::Autoref(_) => " for autoref".to_string(),
+            infer::Autoref(_, _) => " for autoref".to_string(),
             infer::Coercion(_) => " for automatic coercion".to_string(),
             infer::LateBoundRegion(_, br, infer::FnCall) => {
                 format!(" for lifetime parameter {}in function call", br_string(br))