[INFO] cloning repository https://github.com/laohanlinux/util-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/laohanlinux/util-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flaohanlinux%2Futil-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flaohanlinux%2Futil-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a525a0e30e7eefe1d7abafa9d46b65839806254e
[INFO] testing laohanlinux/util-rs against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flaohanlinux%2Futil-rs" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/laohanlinux/util-rs on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/laohanlinux/util-rs
[INFO] finished tweaking git repo https://github.com/laohanlinux/util-rs
[INFO] tweaked toml for git repo https://github.com/laohanlinux/util-rs written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/laohanlinux/util-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded counter v0.5.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9e5b6dbf588816e0012a7d3ed35766bcca87e060f58135f53337f20c5af66513
[INFO] running `Command { std: "docker" "start" "-a" "9e5b6dbf588816e0012a7d3ed35766bcca87e060f58135f53337f20c5af66513", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9e5b6dbf588816e0012a7d3ed35766bcca87e060f58135f53337f20c5af66513", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e5b6dbf588816e0012a7d3ed35766bcca87e060f58135f53337f20c5af66513", kill_on_drop: false }`
[INFO] [stdout] 9e5b6dbf588816e0012a7d3ed35766bcca87e060f58135f53337f20c5af66513
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0f284daac7e009eecb3a763678d869592cb2ba49f6dd752ee8b1aca76074d38d
[INFO] running `Command { std: "docker" "start" "-a" "0f284daac7e009eecb3a763678d869592cb2ba49f6dd752ee8b1aca76074d38d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling ext-fs v0.1.0 (/opt/rustwide/workdir/ext-fs)
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> ext-fs/src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(result_map_or_else)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `result_map_or_else` has been stable since 1.41.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> ext-fs/src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(result_map_or_else)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` 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 `ext-fs` due to 2 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "0f284daac7e009eecb3a763678d869592cb2ba49f6dd752ee8b1aca76074d38d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f284daac7e009eecb3a763678d869592cb2ba49f6dd752ee8b1aca76074d38d", kill_on_drop: false }`
[INFO] [stdout] 0f284daac7e009eecb3a763678d869592cb2ba49f6dd752ee8b1aca76074d38d