[INFO] fetching crate two-sided-vec 0.1.11...
[INFO] testing two-sided-vec-0.1.11 against 1.75.0 for beta-1.76-1
[INFO] extracting crate two-sided-vec 0.1.11 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate two-sided-vec 0.1.11 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate two-sided-vec 0.1.11
[INFO] finished tweaking crates.io crate two-sided-vec 0.1.11
[INFO] tweaked toml for crates.io crate two-sided-vec 0.1.11 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,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" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 96b4dfdc0085767d3040f1275463546ae0677f41ca2460e2ff35d3c074da9477
[INFO] running `Command { std: "docker" "start" "-a" "96b4dfdc0085767d3040f1275463546ae0677f41ca2460e2ff35d3c074da9477", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "96b4dfdc0085767d3040f1275463546ae0677f41ca2460e2ff35d3c074da9477", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "96b4dfdc0085767d3040f1275463546ae0677f41ca2460e2ff35d3c074da9477", kill_on_drop: false }`
[INFO] [stdout] 96b4dfdc0085767d3040f1275463546ae0677f41ca2460e2ff35d3c074da9477
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,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" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-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" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 686e05b189b05554113ebe263f52234a9c2c48c60e45a889d56afaf2b167484f
[INFO] running `Command { std: "docker" "start" "-a" "686e05b189b05554113ebe263f52234a9c2c48c60e45a889d56afaf2b167484f", kill_on_drop: false }`
[INFO] [stderr]    Compiling two-sided-vec v0.1.11 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | / #![feature(
[INFO] [stdout] 2 | |     dropck_eyepatch, // Needed to bypass dropchk
[INFO] [stdout] 3 | |     allocator_api, // We need to allocate raw memory
[INFO] [stdout] 4 | |     alloc_layout_extra, // We need to allocate memory
[INFO] [stdout] 5 | |     trusted_len, // Trusted length iterators improve performance
[INFO] [stdout] 6 | |     min_specialization, // Used to improve extend performance
[INFO] [stdout] 7 | | )]
[INFO] [stdout]   | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     allocator_api, // We need to allocate raw memory
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     alloc_layout_extra, // We need to allocate memory
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     trusted_len, // Trusted length iterators improve performance
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `two-sided-vec` (lib) due to 5 previous errors
[INFO] running `Command { std: "docker" "inspect" "686e05b189b05554113ebe263f52234a9c2c48c60e45a889d56afaf2b167484f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "686e05b189b05554113ebe263f52234a9c2c48c60e45a889d56afaf2b167484f", kill_on_drop: false }`
[INFO] [stdout] 686e05b189b05554113ebe263f52234a9c2c48c60e45a889d56afaf2b167484f
