Merge remote-tracking branch 'upstream/master' into box-alloc

.mailmap

@@ -29,7 +29,6 @@ Ariel Ben-Yehuda <arielb1@mail.tau.ac.il> arielb1 <arielb1@mail.tau.ac.il>
 Austin Seipp <mad.one@gmail.com> <as@hacks.yi.org>
 Aydin Kim <ladinjin@hanmail.net> aydin.kim <aydin.kim@samsung.com>
 Barosl Lee <vcs@barosl.com> Barosl LEE <github@barosl.com>
-Bastian Kauschke <bastian_kauschke@hotmail.de>
 Ben Alpert <ben@benalpert.com> <spicyjalapeno@gmail.com>
 Ben Sago <ogham@users.noreply.github.com> Ben S <ogham@bsago.me>
 Ben Sago <ogham@users.noreply.github.com> Ben S <ogham@users.noreply.github.com>
@@ -161,6 +160,7 @@ Kyle J Strand <batmanaod@gmail.com> <kyle.j.strand@gmail.com>
 Kyle J Strand <batmanaod@gmail.com> <kyle.strand@pieinsurance.com>
 Kyle J Strand <batmanaod@gmail.com> <kyle.strand@rms.com>
 Laurențiu Nicola <lnicola@dend.ro>
+lcnr <bastian_kauschke@hotmail.de>
 Lee Jeffery <leejeffery@gmail.com> Lee Jeffery <lee@leejeffery.co.uk>
 Lee Wondong <wdlee91@gmail.com>
 Lennart Kudling <github@kudling.de>

CONTRIBUTING.md

@@ -2,14 +2,14 @@
 
 Thank you for your interest in contributing to Rust!
 
-To get started, read the [Getting Started] guide in the [rustc-dev-guide].
+To get started, read the [Contributing to Rust] chapter of the [rustc-dev-guide].
 
 ## Bug reports
 
 Did a compiler error message tell you to come here? If you want to create an ICE report,
 refer to [this section][contributing-bug-reports] and [open an issue][issue template].
 
-[Getting Started]: https://rustc-dev-guide.rust-lang.org/getting-started.html
+[Contributing to Rust]: https://rustc-dev-guide.rust-lang.org/contributing.html#contributing-to-rust
 [rustc-dev-guide]: https://rustc-dev-guide.rust-lang.org/
 [contributing-bug-reports]: https://rustc-dev-guide.rust-lang.org/contributing.html#bug-reports
 [issue template]: https://github.com/rust-lang/rust/issues/new/choose

Cargo.lock

@@ -310,7 +310,7 @@ dependencies = [
  "crypto-hash",
  "curl",
  "curl-sys",
- "env_logger 0.7.1",
+ "env_logger 0.8.1",
  "filetime",
  "flate2",
  "fwdansi",
@@ -418,6 +418,17 @@ dependencies = [
  "serde_json",
 ]
 
+[[package]]
+name = "cargo_metadata"
+version = "0.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d5a5f7b42f606b7f23674f6f4d877628350682bc40687d3fae65679a58d55345"
+dependencies = [
+ "semver 0.11.0",
+ "serde",
+ "serde_json",
+]
+
 [[package]]
 name = "cargotest2"
 version = "0.1.0"
@@ -530,15 +541,14 @@ dependencies = [
 name = "clippy"
 version = "0.0.212"
 dependencies = [
- "cargo_metadata 0.11.1",
+ "cargo_metadata 0.12.0",
  "clippy-mini-macro-test",
  "clippy_lints",
  "compiletest_rs",
  "derive-new",
- "lazy_static",
  "rustc-workspace-hack",
  "rustc_tools_util 0.2.0",
- "semver 0.10.0",
+ "semver 0.11.0",
  "serde",
  "tempfile",
  "tester",
@@ -552,14 +562,14 @@ version = "0.2.0"
 name = "clippy_lints"
 version = "0.0.212"
 dependencies = [
- "cargo_metadata 0.11.1",
+ "cargo_metadata 0.12.0",
  "if_chain",
  "itertools 0.9.0",
  "pulldown-cmark 0.8.0",
  "quine-mc_cluskey",
  "quote",
  "regex-syntax",
- "semver 0.10.0",
+ "semver 0.11.0",
  "serde",
  "smallvec 1.4.2",
  "syn",
@@ -626,9 +636,9 @@ dependencies = [
 
 [[package]]
 name = "compiler_builtins"
-version = "0.1.35"
+version = "0.1.36"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e3fcd8aba10d17504c87ef12d4f62ef404c6a4703d16682a9eb5543e6cf24455"
+checksum = "7cd0782e0a7da7598164153173e5a5d4d9b1da094473c98dce0ff91406112369"
 dependencies = [
  "cc",
  "rustc-std-workspace-core",
@@ -1035,6 +1045,19 @@ dependencies = [
  "termcolor",
 ]
 
+[[package]]
+name = "env_logger"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "54532e3223c5af90a6a757c90b5c5521564b07e5e7a958681bcd2afad421cdcd"
+dependencies = [
+ "atty",
+ "humantime 2.0.1",
+ "log",
+ "regex",
+ "termcolor",
+]
+
 [[package]]
 name = "error_index_generator"
 version = "0.0.0"
@@ -1353,9 +1376,9 @@ dependencies = [
 
 [[package]]
 name = "hermit-abi"
-version = "0.1.15"
+version = "0.1.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3deed196b6e7f9e44a2ae8d94225d80302d81208b1bb673fd21fe634645c85a9"
+checksum = "5aca5565f760fb5b220e499d72710ed156fdb74e631659e99377d9ebfbd13ae8"
 dependencies = [
  "compiler_builtins",
  "libc",
@@ -1744,6 +1767,10 @@ dependencies = [
 [[package]]
 name = "linkchecker"
 version = "0.1.0"
+dependencies = [
+ "once_cell",
+ "regex",
+]
 
 [[package]]
 name = "linked-hash-map"
@@ -1940,6 +1967,17 @@ dependencies = [
  "rustc-hash",
 ]
 
+[[package]]
+name = "measureme"
+version = "9.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "22bf8d885d073610aee20e7fa205c4341ed32a761dbde96da5fd96301a8d3e82"
+dependencies = [
+ "parking_lot 0.11.0",
+ "rustc-hash",
+ "smallvec 1.4.2",
+]
+
 [[package]]
 name = "memchr"
 version = "2.3.3"
@@ -3072,7 +3110,7 @@ dependencies = [
  "indexmap",
  "jobserver",
  "libc",
- "measureme",
+ "measureme 0.7.1",
  "parking_lot 0.11.0",
  "rustc-ap-rustc_graphviz",
  "rustc-ap-rustc_index",
@@ -3272,9 +3310,9 @@ dependencies = [
 
 [[package]]
 name = "rustc-demangle"
-version = "0.1.16"
+version = "0.1.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4c691c0e608126e00913e33f0ccf3727d5fc84573623b8d65b2df340b5201783"
+checksum = "6e3bad0ee36814ca07d7968269dd4b7ec89ec2da10c4bb613928d3077083c232"
 dependencies = [
  "compiler_builtins",
  "rustc-std-workspace-core",
@@ -3474,7 +3512,7 @@ version = "0.0.0"
 dependencies = [
  "bitflags",
  "libc",
- "measureme",
+ "measureme 9.0.0",
  "rustc-demangle",
  "rustc_ast",
  "rustc_attr",
@@ -3540,7 +3578,7 @@ dependencies = [
  "indexmap",
  "jobserver",
  "libc",
- "measureme",
+ "measureme 9.0.0",
  "parking_lot 0.11.0",
  "rustc-hash",
  "rustc-rayon",
@@ -3845,7 +3883,7 @@ version = "0.0.0"
 dependencies = [
  "bitflags",
  "chalk-ir",
- "measureme",
+ "measureme 9.0.0",
  "polonius-engine",
  "rustc-rayon-core",
  "rustc_apfloat",
@@ -4356,7 +4394,7 @@ version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
 dependencies = [
- "semver-parser",
+ "semver-parser 0.7.0",
  "serde",
 ]
 
@@ -4366,7 +4404,17 @@ version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "394cec28fa623e00903caf7ba4fa6fb9a0e260280bb8cdbbba029611108a0190"
 dependencies = [
- "semver-parser",
+ "semver-parser 0.7.0",
+ "serde",
+]
+
+[[package]]
+name = "semver"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f301af10236f6df4160f7c3f04eec6dbc70ace82d23326abad5edee88801c6b6"
+dependencies = [
+ "semver-parser 0.10.1",
  "serde",
 ]
 
@@ -4376,6 +4424,15 @@ version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
 
+[[package]]
+name = "semver-parser"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "42ef146c2ad5e5f4b037cd6ce2ebb775401729b19a82040c1beac9d36c7d1428"
+dependencies = [
+ "pest",
+]
+
 [[package]]
 name = "serde"
 version = "1.0.115"
@@ -4407,9 +4464,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.57"
+version = "1.0.59"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "164eacbdb13512ec2745fb09d51fd5b22b0d65ed294a1dcf7285a360c80a675c"
+checksum = "dcac07dbffa1c65e7f816ab9eba78eb142c6d44410f4eeba1e26e4f5dfa56b95"
 dependencies = [
  "itoa",
  "ryu",

README.md

@@ -9,8 +9,7 @@ standard library, and documentation.
 
 **Note: this README is for _users_ rather than _contributors_.
 If you wish to _contribute_ to the compiler, you should read the
-[Getting Started][gettingstarted] of the rustc-dev-guide instead of this
-section.**
+[Getting Started][gettingstarted] section of the rustc-dev-guide instead.**
 
 ## Quick Start
 

compiler/rustc_arena/src/lib.rs

@@ -217,16 +217,18 @@ impl<T> TypedArena<T> {
             let mut chunks = self.chunks.borrow_mut();
             let mut new_cap;
             if let Some(last_chunk) = chunks.last_mut() {
-                let used_bytes = self.ptr.get() as usize - last_chunk.start() as usize;
-                last_chunk.entries = used_bytes / mem::size_of::<T>();
+                // If a type is `!needs_drop`, we don't need to keep track of how many elements
+                // the chunk stores - the field will be ignored anyway.
+                if mem::needs_drop::<T>() {
+                    let used_bytes = self.ptr.get() as usize - last_chunk.start() as usize;
+                    last_chunk.entries = used_bytes / mem::size_of::<T>();
+                }
 
                 // If the previous chunk's len is less than HUGE_PAGE
                 // bytes, then this chunk will be least double the previous
                 // chunk's size.
-                new_cap = last_chunk.storage.len();
-                if new_cap < HUGE_PAGE / elem_size {
-                    new_cap = new_cap.checked_mul(2).unwrap();
-                }
+                new_cap = last_chunk.storage.len().min(HUGE_PAGE / elem_size / 2);
+                new_cap = new_cap * 2;
             } else {
                 new_cap = PAGE / elem_size;
             }
@@ -343,10 +345,8 @@ impl DroplessArena {
                 // If the previous chunk's len is less than HUGE_PAGE
                 // bytes, then this chunk will be least double the previous
                 // chunk's size.
-                new_cap = last_chunk.storage.len();
-                if new_cap < HUGE_PAGE {
-                    new_cap = new_cap.checked_mul(2).unwrap();
-                }
+                new_cap = last_chunk.storage.len().min(HUGE_PAGE / 2);
+                new_cap = new_cap * 2;
             } else {
                 new_cap = PAGE;
             }