From af333732eb2bdcb85b8db44a70ac481ddae1ecf7 Mon Sep 17 00:00:00 2001 From: Trevor Gross Date: Mon, 26 Aug 2024 14:56:18 -0400 Subject: [PATCH] Pin memchr to 2.5.0 in the library rather than rustc_ast 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] --- compiler/rustc_ast/Cargo.toml | 3 +-- library/std/Cargo.toml | 4 ++++ 2 files changed, 5 insertions(+), 2 deletions(-) diff --git a/compiler/rustc_ast/Cargo.toml b/compiler/rustc_ast/Cargo.toml index d33f9666b484c..34c612dac692b 100644 --- a/compiler/rustc_ast/Cargo.toml +++ b/compiler/rustc_ast/Cargo.toml @@ -4,10 +4,9 @@ version = "0.0.0" edition = "2021" [dependencies] -# FIXME: bumping memchr to 2.7.1 causes linker errors in MSVC thin-lto # tidy-alphabetical-start bitflags = "2.4.1" -memchr = "=2.5.0" +memchr = "2.7.4" rustc_ast_ir = { path = "../rustc_ast_ir" } rustc_data_structures = { path = "../rustc_data_structures" } rustc_index = { path = "../rustc_index" } diff --git a/library/std/Cargo.toml b/library/std/Cargo.toml index 9a31fd21dc71a..e4b291d26bd43 100644 --- a/library/std/Cargo.toml +++ b/library/std/Cargo.toml @@ -23,6 +23,10 @@ unwind = { path = "../unwind" } hashbrown = { version = "0.14", default-features = false, features = [ '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 is resolved 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 = [ 'rustc-dep-of-std', ] }