[INFO] fetching crate vmem 1.0.0...
[INFO] testing vmem-1.0.0 against 1.99.0-beta.8 for beta-1.100-2
[INFO] extracting crate vmem 1.0.0 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate vmem 1.0.0
[INFO] removed 1 missing examples
[INFO] finished tweaking crates.io crate vmem 1.0.0
[INFO] tweaked toml for crates.io crate vmem 1.0.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate vmem 1.0.0 on toolchain 1.99.0-beta.8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate vmem 1.0.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mortal v0.2.4
[INFO] [stderr]   Downloaded linefeed v0.6.0
[INFO] [stderr]   Downloaded unicode-width v0.1.11
[INFO] [stderr]   Downloaded redox_users v0.3.5
[INFO] [stderr]   Downloaded anstyle-query v1.0.2
[INFO] [stderr]   Downloaded terminfo v0.8.0
[INFO] [stderr]   Downloaded phf_shared v0.11.2
[INFO] [stderr]   Downloaded arrayref v0.3.7
[INFO] [stderr]   Downloaded clap-num v1.0.2
[INFO] [stderr]   Downloaded phf_generator v0.11.2
[INFO] [stderr]   Downloaded phf_codegen v0.11.2
[INFO] [stderr]   Downloaded constant_time_eq v0.1.5
[INFO] [stderr]   Downloaded libredox v0.0.1
[INFO] [stderr]   Downloaded anstyle v1.0.4
[INFO] [stderr]   Downloaded anstyle-wincon v3.0.2
[INFO] [stderr]   Downloaded dirs v1.0.5
[INFO] [stderr]   Downloaded clap_lex v0.6.0
[INFO] [stderr]   Downloaded utf8parse v0.2.1
[INFO] [stderr]   Downloaded redox_users v0.4.4
[INFO] [stderr]   Downloaded phf v0.11.2
[INFO] [stderr]   Downloaded smallstr v0.2.0
[INFO] [stderr]   Downloaded redox_syscall v0.1.57
[INFO] [stderr]   Downloaded clap_derive v4.4.7
[INFO] [stderr]   Downloaded colorchoice v1.0.0
[INFO] [stderr]   Downloaded rust-argon2 v0.8.3
[INFO] [stderr]   Downloaded anstream v0.6.7
[INFO] [stderr]   Downloaded arrayvec v0.5.2
[INFO] [stderr]   Downloaded anstyle-parse v0.2.3
[INFO] [stderr]   Downloaded getrandom v0.2.12
[INFO] [stderr]   Downloaded smallvec v1.12.0
[INFO] [stderr]   Downloaded strsim v0.10.0
[INFO] [stderr]   Downloaded proc-macro2 v1.0.76
[INFO] [stderr]   Downloaded bitflags v2.4.1
[INFO] [stderr]   Downloaded blake2b_simd v0.5.11
[INFO] [stderr]   Downloaded num-traits v0.2.17
[INFO] [stderr]   Downloaded clap v4.4.17
[INFO] [stderr]   Downloaded anyhow v1.0.79
[INFO] [stderr]   Downloaded crossbeam-utils v0.8.19
[INFO] [stderr]   Downloaded portable-atomic v1.6.0
[INFO] [stderr]   Downloaded memchr v2.7.1
[INFO] [stderr]   Downloaded clap_builder v4.4.17
[INFO] [stderr]   Downloaded nix v0.26.4
[INFO] [stderr]   Downloaded libc v0.2.152
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3111399a4047eeb3a02b7a90e478d715f38a8c6669b5c4b49d30a17385265909" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 8c4d621c1cec2701ec91fb404e67a6d88ae3daa1dc01f7afea193594bb158c63
[INFO] running `Command { std: "docker" "start" "8c4d621c1cec2701ec91fb404e67a6d88ae3daa1dc01f7afea193594bb158c63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8c4d621c1cec2701ec91fb404e67a6d88ae3daa1dc01f7afea193594bb158c63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "8c4d621c1cec2701ec91fb404e67a6d88ae3daa1dc01f7afea193594bb158c63" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8c4d621c1cec2701ec91fb404e67a6d88ae3daa1dc01f7afea193594bb158c63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "8c4d621c1cec2701ec91fb404e67a6d88ae3daa1dc01f7afea193594bb158c63" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling portable-atomic v1.6.0
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling vmem v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:3:34
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![cfg_attr(feature = "nightly", feature(allocator_api))]
[INFO] [stdout]   |                                  ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `vmem` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "8c4d621c1cec2701ec91fb404e67a6d88ae3daa1dc01f7afea193594bb158c63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c4d621c1cec2701ec91fb404e67a6d88ae3daa1dc01f7afea193594bb158c63", kill_on_drop: false }`
[INFO] [stdout] 8c4d621c1cec2701ec91fb404e67a6d88ae3daa1dc01f7afea193594bb158c63
