[INFO] fetching crate oursh 0.2.0...
[INFO] testing oursh-0.2.0 against 1.54.0 for beta-1.55-1
[INFO] extracting crate oursh 0.2.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate oursh 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] removed /workspace/builds/worker-6/source/rust-toolchain
[INFO] started tweaking crates.io crate oursh 0.2.0
[INFO] finished tweaking crates.io crate oursh 0.2.0
[INFO] tweaked toml for crates.io crate oursh 0.2.0 written to /workspace/builds/worker-6/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] ca4dbe6bc51db7c9b6b34148d85cecde8a2bf7f88e671c544f3afa71754091f1
[INFO] running `Command { std: "docker" "start" "-a" "ca4dbe6bc51db7c9b6b34148d85cecde8a2bf7f88e671c544f3afa71754091f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ca4dbe6bc51db7c9b6b34148d85cecde8a2bf7f88e671c544f3afa71754091f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca4dbe6bc51db7c9b6b34148d85cecde8a2bf7f88e671c544f3afa71754091f1", kill_on_drop: false }`
[INFO] [stdout] ca4dbe6bc51db7c9b6b34148d85cecde8a2bf7f88e671c544f3afa71754091f1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] bb0a0c55eeb4fbf4e997e87b4f91f7111a1db91b5f10ddd50f59963877450383
[INFO] running `Command { std: "docker" "start" "-a" "bb0a0c55eeb4fbf4e997e87b4f91f7111a1db91b5f10ddd50f59963877450383", kill_on_drop: false }`
[INFO] [stderr]    Compiling ordermap v0.3.5
[INFO] [stderr]    Compiling fixedbitset v0.1.9
[INFO] [stderr]    Compiling diff v0.1.12
[INFO] [stderr]    Compiling lalrpop-util v0.16.3
[INFO] [stderr]    Compiling nix v0.11.1
[INFO] [stderr]    Compiling numtoa v0.1.0
[INFO] [stderr]    Compiling strsim v0.6.0
[INFO] [stderr]    Compiling utf8 v0.0.2
[INFO] [stderr]    Compiling ascii-canvas v1.0.0
[INFO] [stderr]    Compiling ena v0.11.0
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling docopt v1.1.1
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling string_cache_codegen v0.4.4
[INFO] [stderr]    Compiling docopt v0.8.3
[INFO] [stderr]    Compiling termion v1.5.6
[INFO] [stderr]    Compiling pwd v1.3.1
[INFO] [stderr]    Compiling petgraph v0.4.13
[INFO] [stderr]    Compiling string_cache v0.7.5
[INFO] [stderr]    Compiling lalrpop v0.16.3
[INFO] [stderr]    Compiling oursh v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:77:1
[INFO] [stdout]    |
[INFO] [stdout] 77 | #![feature(alloc_system, box_syntax, box_patterns)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/oursh-225cfd79ff3cdb29/out/program/posix.rs:1589:5
[INFO] [stdout]      |
[INFO] [stdout] 1589 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `oursh`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "bb0a0c55eeb4fbf4e997e87b4f91f7111a1db91b5f10ddd50f59963877450383", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb0a0c55eeb4fbf4e997e87b4f91f7111a1db91b5f10ddd50f59963877450383", kill_on_drop: false }`
[INFO] [stdout] bb0a0c55eeb4fbf4e997e87b4f91f7111a1db91b5f10ddd50f59963877450383
