[INFO] fetching crate jujutsu-lib 0.2.0...
[INFO] testing jujutsu-lib-0.2.0 against 1.54.0 for beta-1.55-1
[INFO] extracting crate jujutsu-lib 0.2.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate jujutsu-lib 0.2.0 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate jujutsu-lib 0.2.0
[INFO] finished tweaking crates.io crate jujutsu-lib 0.2.0
[INFO] tweaked toml for crates.io crate jujutsu-lib 0.2.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0776e5c0cc4d9161d75a2a24415be3288d85af6997e85f5b6af4bf70ce358229
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "0776e5c0cc4d9161d75a2a24415be3288d85af6997e85f5b6af4bf70ce358229", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0776e5c0cc4d9161d75a2a24415be3288d85af6997e85f5b6af4bf70ce358229", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0776e5c0cc4d9161d75a2a24415be3288d85af6997e85f5b6af4bf70ce358229", kill_on_drop: false }`
[INFO] [stdout] 0776e5c0cc4d9161d75a2a24415be3288d85af6997e85f5b6af4bf70ce358229
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ee15086e0ab61ac9fd4954a5e198834d80a80fb4786f149413b983c14d6c0337
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ee15086e0ab61ac9fd4954a5e198834d80a80fb4786f149413b983c14d6c0337", kill_on_drop: false }`
[INFO] [stderr]    Compiling protobuf v2.24.1
[INFO] [stderr]    Compiling zstd-safe v3.0.1+zstd.1.4.9
[INFO] [stderr]    Compiling whoami v1.1.2
[INFO] [stderr]    Compiling crypto-mac v0.8.0
[INFO] [stderr]    Compiling zstd-sys v1.4.20+zstd.1.4.9
[INFO] [stderr]    Compiling serde-hjson v0.9.1
[INFO] [stderr]    Compiling pest_generator v2.1.3
[INFO] [stderr]    Compiling dirs v3.0.2
[INFO] [stderr]    Compiling backoff v0.2.1
[INFO] [stderr]    Compiling blake2 v0.9.1
[INFO] [stderr]    Compiling config v0.10.1
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]    Compiling protobuf-codegen v2.24.1
[INFO] [stderr]    Compiling protobuf-codegen-pure v2.24.1
[INFO] [stderr]    Compiling jujutsu-lib v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling zstd v0.6.1+zstd.1.4.9
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | #![feature(assert_matches)]
[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:16:1
[INFO] [stdout]    |
[INFO] [stdout] 16 | #![feature(get_mut_unchecked)]
[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:17:1
[INFO] [stdout]    |
[INFO] [stdout] 17 | #![feature(map_first_last)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 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 `jujutsu-lib`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "ee15086e0ab61ac9fd4954a5e198834d80a80fb4786f149413b983c14d6c0337", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee15086e0ab61ac9fd4954a5e198834d80a80fb4786f149413b983c14d6c0337", kill_on_drop: false }`
[INFO] [stdout] ee15086e0ab61ac9fd4954a5e198834d80a80fb4786f149413b983c14d6c0337
