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Pin memchr to 2.5.0 in the library rather than rustc_ast

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The latest versions of `memchr` experience LTO-related issues when
compiling for windows-gnu [1], so needs to be pinned. The issue is
present in the standard library.

`memchr` has been pinned in `rustc_ast`, but since the workspace was
recently split, this pin no longer has any effect on library crates.

Resolve this by adding `memchr` as an _unused_ dependency in `std`,
pinned to 2.5. Additionally, remove the pin in `rustc_ast` to allow
non-library crates to upgrade to the latest version.

Link: https://github.com/rust-lang/rust/issues/127890 [1]
This commit is contained in:
Trevor Gross 2024-08-26 14:56:18 -04:00
parent 11e760b7f4
commit e95d15a115
4 changed files with 8 additions and 4 deletions
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4
Cargo.lock
View File

@ -2177,9 +2177,9 @@ dependencies = [
[[package]] [[package]]
name = "memchr" name = "memchr"
version = "2.5.0" version = "2.7.4"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d" checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
[[package]] [[package]]
name = "memmap2" name = "memmap2"

3
compiler/rustc_ast/Cargo.toml
View File

@ -4,10 +4,9 @@ version = "0.0.0"
edition = "2021" edition = "2021"
[dependencies] [dependencies]
# FIXME: bumping memchr to 2.7.1 causes linker errors in MSVC thin-lto
# tidy-alphabetical-start # tidy-alphabetical-start
bitflags = "2.4.1" bitflags = "2.4.1"
memchr = "=2.5.0" memchr = "2.7.4"
rustc_ast_ir = { path = "../rustc_ast_ir" } rustc_ast_ir = { path = "../rustc_ast_ir" }
rustc_data_structures = { path = "../rustc_data_structures" } rustc_data_structures = { path = "../rustc_data_structures" }
rustc_index = { path = "../rustc_index" } rustc_index = { path = "../rustc_index" }

1
library/Cargo.lock
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@ -326,6 +326,7 @@ dependencies = [
"hashbrown", "hashbrown",
"hermit-abi", "hermit-abi",
"libc", "libc",
"memchr",
"miniz_oxide", "miniz_oxide",
"object", "object",
"panic_abort", "panic_abort",

4
library/std/Cargo.toml
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@ -23,6 +23,10 @@ unwind = { path = "../unwind" }
hashbrown = { version = "0.14", default-features = false, features = [ hashbrown = { version = "0.14", default-features = false, features = [
'rustc-dep-of-std', 'rustc-dep-of-std',
] } ] }
# FIXME(#127890): `object` depends on `memchr`, but `memchr` > v2.5 causes
# issues with LTO. This dependency is not used directly, but pin it here so
# it resolves to 2.5. To be removed once rust-lang/rust#127890 is fixed.
memchr = { version = "=2.5.0", default-features = false, features = ["rustc-dep-of-std"] }
std_detect = { path = "../stdarch/crates/std_detect", default-features = false, features = [ std_detect = { path = "../stdarch/crates/std_detect", default-features = false, features = [
'rustc-dep-of-std', 'rustc-dep-of-std',
] } ] }