[INFO] fetching crate tr-lang 0.4.0...
[INFO] testing tr-lang-0.4.0 against 1.59.0 for beta-1.60-1
[INFO] extracting crate tr-lang 0.4.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate tr-lang 0.4.0 on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-7/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate tr-lang 0.4.0
[INFO] finished tweaking crates.io crate tr-lang 0.4.0
[INFO] tweaked toml for crates.io crate tr-lang 0.4.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate tr-lang 0.4.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] eda7e850223583a2c4725336dd014d50aa08609fd0761794075add72e3bca474
[INFO] running `Command { std: "docker" "start" "-a" "eda7e850223583a2c4725336dd014d50aa08609fd0761794075add72e3bca474", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eda7e850223583a2c4725336dd014d50aa08609fd0761794075add72e3bca474", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eda7e850223583a2c4725336dd014d50aa08609fd0761794075add72e3bca474", kill_on_drop: false }`
[INFO] [stdout] eda7e850223583a2c4725336dd014d50aa08609fd0761794075add72e3bca474
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c7722209130b1250894c7412ec115d7e30e4346d453e08c8781ecff9301c53b0
[INFO] running `Command { std: "docker" "start" "-a" "c7722209130b1250894c7412ec115d7e30e4346d453e08c8781ecff9301c53b0", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.112
[INFO] [stderr]    Compiling syn v1.0.85
[INFO] [stderr]    Compiling io-lifetimes v0.4.4
[INFO] [stderr]    Compiling serde_derive v1.0.133
[INFO] [stderr]    Compiling rustix v0.32.1
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling linux-raw-sys v0.0.37
[INFO] [stderr]    Compiling serde v1.0.133
[INFO] [stderr]    Compiling smallvec v1.8.0
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling endian-type v0.1.2
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling utf8parse v0.2.0
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling quote v1.0.14
[INFO] [stderr]    Compiling nibble_vec v0.1.0
[INFO] [stderr]    Compiling radix_trie v0.2.1
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling dirs-sys-next v0.1.2
[INFO] [stderr]    Compiling nix v0.23.1
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling dirs-next v2.0.0
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling locale_config v0.3.0
[INFO] [stderr]    Compiling fd-lock v3.0.3
[INFO] [stderr]    Compiling tr-lang v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling rustyline v9.1.2
[INFO] [stderr]    Compiling bincode v1.3.3
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(io_error_more)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tr-lang` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "c7722209130b1250894c7412ec115d7e30e4346d453e08c8781ecff9301c53b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c7722209130b1250894c7412ec115d7e30e4346d453e08c8781ecff9301c53b0", kill_on_drop: false }`
[INFO] [stdout] c7722209130b1250894c7412ec115d7e30e4346d453e08c8781ecff9301c53b0