rust: Update to 1.52.0.

Package changes:
 * bump bootstraps to 1.51.0.
 * adjust patches and cargo checksums as required
 * 1.51 failed to build natively on 32-bit armv7, there is hope
   that this is fixed with 1.52.  (1.51 can be built with netbsd32
   emulation on a aarch64 system).

Upsteream changes:

Version 1.52.0 (2021-05-06)
============================

Language
--------
- [Added the `unsafe_op_in_unsafe_fn` lint, which checks whether the unsafe
  code in an `unsafe fn` is wrapped in a `unsafe` block.][79208] This lint
  is allowed by default, and may become a warning or hard error in a
  future edition.
- [You can now cast mutable references to arrays to a pointer of the same
  type as the element.][81479]

Compiler
--------
- [Upgraded the default LLVM to LLVM 12.][81451]

Added tier 3\* support for the following targets.

- [`s390x-unknown-linux-musl`][82166]
- [`riscv32gc-unknown-linux-musl` & `riscv64gc-unknown-linux-musl`][82202]
- [`powerpc-unknown-openbsd`][82733]

\* Refer to Rust's [platform support page][platform-support-doc] for more
information on Rust's tiered platform support.

Libraries
---------
- [`OsString` now implements `Extend` and `FromIterator`.][82121]
- [`cmp::Reverse` now has `#[repr(transparent)]` representation.][81879]
- [`Arc<impl Error>` now implements `error::Error`.][80553]
- [All integer division and remainder operations are now `const`.][80962]

Stabilised APIs
-------------
- [`Arguments::as_str`]
- [`char::MAX`]
- [`char::REPLACEMENT_CHARACTER`]
- [`char::UNICODE_VERSION`]
- [`char::decode_utf16`]
- [`char::from_digit`]
- [`char::from_u32_unchecked`]
- [`char::from_u32`]
- [`slice::partition_point`]
- [`str::rsplit_once`]
- [`str::split_once`]

The following previously stable APIs are now `const`.

- [`char::len_utf8`]
- [`char::len_utf16`]
- [`char::to_ascii_uppercase`]
- [`char::to_ascii_lowercase`]
- [`char::eq_ignore_ascii_case`]
- [`u8::to_ascii_uppercase`]
- [`u8::to_ascii_lowercase`]
- [`u8::eq_ignore_ascii_case`]

Rustdoc
-------
- [Rustdoc lints are now treated as a tool lint, meaning that lints are
  now prefixed with `rustdoc::`
  (e.g. `#[warn(rustdoc::non_autolinks)]`).][80527]

  Using the old style is still allowed, and will become a warning in
  a future release.
- [Rustdoc now supports argument files.][82261]
- [Rustdoc now generates smart punctuation for documentation.][79423]
- [You can now use "task lists" in Rustdoc Markdown.][81766] E.g.
  ```markdown
  - [x] Complete
  - [ ] Todo
  ```

Misc
----
- [You can now pass multiple filters to tests.][81356] E.g.
  `cargo test -- foo bar` will run all tests that match `foo` and `bar`.
- [Rustup now distributes PDB symbols for the `std` library on Windows,
  allowing you to see `std` symbols when debugging.][82218]

Internal Only
-------------
These changes provide no direct user facing benefits, but represent significant
improvements to the internals and overall performance of rustc and
related tools.

- [Check the result cache before the DepGraph when ensuring queries][81855]
- [Try fast_reject::simplify_type in coherence before doing full check][81744]
- [Only store a LocalDefId in some HIR nodes][81611]
- [Store HIR attributes in a side table][79519]

Compatibility Notes
-------------------
- [Cargo build scripts are now forbidden from setting `RUSTC_BOOTSTRAP`.]
  [cargo/9181]
- [Removed support for the `x86_64-rumprun-netbsd` target.][82594]
- [Deprecated the `x86_64-sun-solaris` target in favor of `x86_64-pc-solaris`.]
  [82216]
- [Rustdoc now only accepts `,`, ` `, and `\t` as delimiters for specifying
  languages in code blocks.][78429]
- [Rustc now catches more cases of `pub_use_of_private_extern_crate`][80763]
- [Changes in how proc macros handle whitespace may lead to panics when used
  with older `proc-macro-hack` versions. A `cargo update` should be sufficient
  to fix this in all cases.][84136]

[84136]: rust-lang/rust#84136
[80763]: rust-lang/rust#80763
[82166]: rust-lang/rust#82166
[82121]: rust-lang/rust#82121
[81879]: rust-lang/rust#81879
[82261]: rust-lang/rust#82261
[82218]: rust-lang/rust#82218
[82216]: rust-lang/rust#82216
[82202]: rust-lang/rust#82202
[81855]: rust-lang/rust#81855
[81766]: rust-lang/rust#81766
[81744]: rust-lang/rust#81744
[81611]: rust-lang/rust#81611
[81479]: rust-lang/rust#81479
[81451]: rust-lang/rust#81451
[81356]: rust-lang/rust#81356
[80962]: rust-lang/rust#80962
[80553]: rust-lang/rust#80553
[80527]: rust-lang/rust#80527
[79519]: rust-lang/rust#79519
[79423]: rust-lang/rust#79423
[79208]: rust-lang/rust#79208
[78429]: rust-lang/rust#78429
[82733]: rust-lang/rust#82733
[82594]: rust-lang/rust#82594
[cargo/9181]: rust-lang/cargo#9181
[`char::MAX`]: https://doc.rust-lang.org/std/primitive.char.html#associatedconstant.MAX
[`char::REPLACEMENT_CHARACTER`]: https://doc.rust-lang.org/std/primitive.char.html#associatedconstant.REPLACEMENT_CHARACTER
[`char::UNICODE_VERSION`]: https://doc.rust-lang.org/std/primitive.char.html#associatedconstant.UNICODE_VERSION
[`char::decode_utf16`]: https://doc.rust-lang.org/std/primitive.char.html#method.decode_utf16
[`char::from_u32`]: https://doc.rust-lang.org/std/primitive.char.html#method.from_u32
[`char::from_u32_unchecked`]: https://doc.rust-lang.org/std/primitive.char.html#method.from_u32_unchecked
[`char::from_digit`]: https://doc.rust-lang.org/std/primitive.char.html#method.from_digit
[`Peekable::next_if`]: https://doc.rust-lang.org/stable/std/iter/struct.Peekable.html#method.next_if
[`Peekable::next_if_eq`]: https://doc.rust-lang.org/stable/std/iter/struct.Peekable.html#method.next_if_eq
[`Arguments::as_str`]: https://doc.rust-lang.org/stable/std/fmt/struct.Arguments.html#method.as_str
[`str::split_once`]: https://doc.rust-lang.org/stable/std/primitive.str.html#method.split_once
[`str::rsplit_once`]: https://doc.rust-lang.org/stable/std/primitive.str.html#method.rsplit_once
[`slice::partition_point`]: https://doc.rust-lang.org/stable/std/primitive.slice.html#method.partition_point
[`char::len_utf8`]: https://doc.rust-lang.org/stable/std/primitive.char.html#method.len_utf8
[`char::len_utf16`]: https://doc.rust-lang.org/stable/std/primitive.char.html#method.len_utf16
[`char::to_ascii_uppercase`]: https://doc.rust-lang.org/stable/std/primitive.char.html#method.to_ascii_uppercase
[`char::to_ascii_lowercase`]: https://doc.rust-lang.org/stable/std/primitive.char.html#method.to_ascii_lowercase
[`char::eq_ignore_ascii_case`]: https://doc.rust-lang.org/stable/std/primitive.char.html#method.eq_ignore_ascii_case
[`u8::to_ascii_uppercase`]: https://doc.rust-lang.org/stable/std/primitive.u8.html#method.to_ascii_uppercase
[`u8::to_ascii_lowercase`]: https://doc.rust-lang.org/stable/std/primitive.u8.html#method.to_ascii_lowercase
[`u8::eq_ignore_ascii_case`]: https://doc.rust-lang.org/stable/std/primitive.u8.html#method.eq_ignore_ascii_case

Author: he32

rust/Makefile

@@ -1,6 +1,6 @@
 # $NetBSD: Makefile,v 1.197 2020/09/29 16:45:16 gdt Exp $
 
-DISTNAME=	rustc-1.51.0-src
+DISTNAME=	rustc-1.52.0-src
 PKGNAME=	${DISTNAME:S/rustc/rust/:S/-src//}
 CATEGORIES=	lang
 MASTER_SITES=	https://static.rust-lang.org/dist/
@@ -167,23 +167,23 @@ BUILDLINK_TRANSFORM.NetBSD+=	rm:-Wl,--enable-new-dtags
 DISTFILES:=		${DEFAULT_DISTFILES}
 
 .if !empty(MACHINE_PLATFORM:MDarwin-*-x86_64) || make(distinfo) || make (makesum) || make(mdi)
-RUST_STAGE0_VER=	1.50.0
+RUST_STAGE0_VER=	1.51.0
 RUST_ARCH:=		x86_64-apple-darwin
 RUST_STAGE0:=		rust-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
 RUST_STD_STAGE0:=	rust-std-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
 DISTFILES:=		${DISTFILES} ${RUST_STAGE0} ${RUST_STD_STAGE0}
 pre-build-fix:
 .endif
 .if !empty(MACHINE_PLATFORM:MLinux-*-i386) || make(distinfo) || make (makesum) || make(mdi)
-RUST_STAGE0_VER=	1.50.0
+RUST_STAGE0_VER=	1.51.0
 RUST_ARCH:=		i686-unknown-linux-gnu
 RUST_STAGE0:=		rust-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
 RUST_STD_STAGE0:=	rust-std-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
 DISTFILES:=		${DISTFILES} ${RUST_STAGE0} ${RUST_STD_STAGE0}
 pre-build-fix:
 .endif
 .if !empty(MACHINE_PLATFORM:MLinux-*-x86_64) || make(distinfo) || make (makesum) || make(mdi)
-RUST_STAGE0_VER=	1.50.0
+RUST_STAGE0_VER=	1.51.0
 RUST_ARCH:=		x86_64-unknown-linux-gnu
 RUST_STAGE0:=		rust-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
 RUST_STD_STAGE0:=	rust-std-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
@@ -196,7 +196,7 @@ pre-build-fix:
 # x86_64-sun-solaris bootstrap and comment out the overrides.
 #
 .if !empty(MACHINE_PLATFORM:MSunOS-*-x86_64) || make(distinfo) || make (makesum) || make(mdi)
-RUST_STAGE0_VER=	1.50.0
+RUST_STAGE0_VER=	1.51.0
 RUST_ARCH:=		x86_64-unknown-illumos
 RUST_STAGE0:=		rust-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
 SITES.${RUST_STAGE0}=	https://us-east.manta.joyent.com/pkgsrc/public/pkg-bootstraps/
@@ -210,7 +210,7 @@ CONFIGURE_ARGS+=	--target=${RUST_ARCH}
 pre-build-fix:
 .endif
 .if !empty(MACHINE_PLATFORM:MFreeBSD-*-x86_64) || make(distinfo) || make (makesum) || make(mdi)
-RUST_STAGE0_VER=	1.50.0
+RUST_STAGE0_VER=	1.51.0
 RUST_ARCH:=		x86_64-unknown-freebsd
 RUST_STAGE0:=		rust-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
 RUST_STD_STAGE0:=	rust-std-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
@@ -235,15 +235,15 @@ pre-build-fix:
 	${TOOLS_PLATFORM.paxctl} +am ${WRKDIR}/rust-bootstrap/bin/rustc
 .endif
 .if !empty(MACHINE_PLATFORM:MNetBSD-*-x86_64) || make(distinfo) || make (makesum) || make(mdi)
-RUST_STAGE0_VER=	1.50.0
+RUST_STAGE0_VER=	1.51.0
 RUST_ARCH=		x86_64-unknown-netbsd
 RUST_STAGE0:=		rust-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
 RUST_STD_STAGE0:=	rust-std-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
 DISTFILES:=		${DISTFILES} ${RUST_STAGE0} ${RUST_STD_STAGE0}
 pre-build-fix:
 .endif
 .if !empty(MACHINE_PLATFORM:MNetBSD-*-powerpc) || make(distinfo) || make (makesum) || make(mdi)
-RUST_STAGE0_VER=	1.50.0
+RUST_STAGE0_VER=	1.51.0
 RUST_ARCH=		powerpc-unknown-netbsd
 
 # Cross-built against NetBSD 9.0
@@ -267,7 +267,7 @@ SITES.${RUST_STD_STAGE0}=	${MASTER_SITE_LOCAL:=rust/}
 pre-build-fix:
 .endif
 .if !empty(MACHINE_PLATFORM:MNetBSD-*-aarch64) || make(distinfo) || make (makesum) || make(mdi)
-RUST_STAGE0_VER=	1.50.0
+RUST_STAGE0_VER=	1.51.0
 RUST_ARCH=		aarch64-unknown-netbsd
 RUST_STAGE0:=		rust-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
 RUST_STD_STAGE0:=	rust-std-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
@@ -287,7 +287,7 @@ SITES.${RUST_STD_STAGE0}=	${MASTER_SITE_LOCAL:=rust/}
 pre-build-fix:
 .endif
 .if !empty(MACHINE_PLATFORM:MNetBSD-*-sparc64) || make(distinfo) || make (makesum) || make(mdi)
-RUST_STAGE0_VER=	1.50.0
+RUST_STAGE0_VER=	1.51.0
 RUST_ARCH=		sparc64-unknown-netbsd
 RUST_STAGE0:=		rust-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
 RUST_STD_STAGE0:=	rust-std-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
@@ -298,7 +298,7 @@ pre-build-fix:
 .endif
 .if !empty(MACHINE_PLATFORM:MNetBSD-*-earmv7hf) || make(distinfo) || make (makesum) || make(mdi)
 RUST_ARCH=		armv7-unknown-netbsd-eabihf
-RUST_STAGE0_VER=	1.50.0
+RUST_STAGE0_VER=	1.51.0
 RUST_STAGE0:=		rust-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
 RUST_STD_STAGE0:=	rust-std-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
 DISTFILES:=		${DISTFILES} ${RUST_STAGE0} ${RUST_STD_STAGE0}
@@ -338,8 +338,8 @@ SUBST_VARS.rpath=	PREFIX
 # updating and verification.
 #
 CKSUM_CRATES+=	vendor/libc
-CKSUMS+=	8d7ddc8dd25a9404f9181a49438d9506c676cfd4b6fa21dbe5c1f9969abc4b91
-CKSUMS+=	f147be95b04ea1303171dff46c5a66b08cd47ccd0a4c346d5bcec7a8aaac3fc4
+CKSUMS+=	ed57a5ad4c715a9038055fe3a57ea12f5ef97c55c3f603596e721a5cbb90ed73
+CKSUMS+=	3cd5c5296dc09431c77663cb5b4b4ddd4454e18b6846fdb670da859280d3f6d1
 
 CKSUM_CRATES+=	vendor/cc-1.0.60
 CKSUMS+=	903c5f2f5dd0cc7d04f99f605a95e6abde8b38156fd4e73eefc58493f55a4e5a