The dependencies of the backtrace crate in libstd are outdated.

[glandium]

library/std/Cargo.toml contains:

addr2line = { version = "0.16.0", optional = true, default-features = false }
miniz_oxide = { version = "0.4.0", optional = true, default-features = false }

library/backtrace/Cargo.toml has:

addr2line = { version = "0.17.0", default-features = false }
miniz_oxide = { version = "0.5.0", default-features = false }

(and current master of the backtrace-rs repo has even different versions)

It seems to me backtrace should have its own rustc-dep-of-std feature, which would avoid libstd enabling the feature on stale dependencies.

It's worth noting that the dependencies in crates/as-if-std/Cargo.toml in backtrace-rs match what's currently in libstd, although I'm not sure what that's testing considering there is no dependency on the backtrace crate in there...

[bjorn3]

It seems to me backtrace should have its own rustc-dep-of-std feature, which would avoid libstd enabling the feature on stale dependencies.

rustc-dep-of-std wouldn't work for backtrace. It isn't used as regular dependency, but directly included in libstd using #[path = "../../backtrace/src/lib.rs"] mod backtrace_rs;. This is necessary because backtrace depends on libstd for reading files, while libstd depends on backtrace for the std::backtrace module and for panic messages. To break this cyclic dependency both have been merged into the same crate. crates/as-if-std emulates the same inclusion mechanism outside of libstd to test that it doesn't break.

[766974616c79]

Hi, is this exit no longer valid? The two dependencies have the same version on both Cargo.toml

https://github.com/rust-lang/backtrace-rs/blob/4245978ca8169c40c088ff733825e4527f7b914c/Cargo.toml#L40

rust/library/std/Cargo.toml

Line 28 in 2f5e6bb

addr2line = { version = "0.19.0", optional = true, default-features = false }

[workingjubilee]

Effectively resolved, yes. Will be fully resolved by #113176