[INFO] cloning repository https://github.com/museun/a-mistake
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/museun/a-mistake" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmuseun%2Fa-mistake", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmuseun%2Fa-mistake'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 56d9199462b6ba88de454a94bb52c4926efe0f63
[INFO] testing museun/a-mistake against beta-2021-08-01 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmuseun%2Fa-mistake" "/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/museun/a-mistake on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/museun/a-mistake
[INFO] finished tweaking git repo https://github.com/museun/a-mistake
[INFO] tweaked toml for git repo https://github.com/museun/a-mistake written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/museun/a-mistake already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded quote v0.6.10
[INFO] [stderr]   Downloaded miow v0.3.3
[INFO] [stderr]   Downloaded version_check v0.1.5
[INFO] [stderr]   Downloaded serde v1.0.82
[INFO] [stderr]   Downloaded indexmap v1.0.2
[INFO] [stderr]   Downloaded serde_json v1.0.33
[INFO] [stderr]   Downloaded libc v0.2.45
[INFO] [stderr]   Downloaded libz-sys v1.0.25
[INFO] [stderr]   Downloaded redox_syscall v0.1.44
[INFO] [stderr]   Downloaded cc v1.0.27
[INFO] [stderr]   Downloaded rand_chacha v0.1.0
[INFO] [stderr]   Downloaded syn v0.15.23
[INFO] [stderr]   Downloaded time v0.1.41
[INFO] [stderr]   Downloaded curl v0.4.19
[INFO] [stderr]   Downloaded rand v0.6.1
[INFO] [stderr]   Downloaded proc-macro2 v0.4.24
[INFO] [stderr]   Downloaded socket2 v0.3.8
[INFO] [stderr]   Downloaded serde_derive v1.0.82
[INFO] [stderr]   Downloaded regex-syntax v0.6.4
[INFO] [stderr]   Downloaded curl-sys v0.4.15
[INFO] [stderr]   Downloaded rand_xorshift v0.1.0
[INFO] [stderr]   Downloaded byteorder v1.2.7
[INFO] [stderr]   Downloaded memchr v2.1.2
[INFO] [stderr]   Downloaded rand_core v0.3.0
[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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0e9759286bc445a9ab2cc1581e7ba8339a035d010392253ded88d67974e66771
[INFO] running `Command { std: "docker" "start" "-a" "0e9759286bc445a9ab2cc1581e7ba8339a035d010392253ded88d67974e66771", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0e9759286bc445a9ab2cc1581e7ba8339a035d010392253ded88d67974e66771", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e9759286bc445a9ab2cc1581e7ba8339a035d010392253ded88d67974e66771", kill_on_drop: false }`
[INFO] [stdout] 0e9759286bc445a9ab2cc1581e7ba8339a035d010392253ded88d67974e66771
[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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 296a641ded8377d284cedbad79f8066637371369f3365e58fbd42e3a74b7974e
[INFO] running `Command { std: "docker" "start" "-a" "296a641ded8377d284cedbad79f8066637371369f3365e58fbd42e3a74b7974e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.45
[INFO] [stderr]    Compiling cc v1.0.27
[INFO] [stderr]    Compiling cfg-if v0.1.6
[INFO] [stderr]    Compiling rand_core v0.3.0
[INFO] [stderr]    Compiling serde v1.0.82
[INFO] [stderr]    Compiling lazy_static v1.2.0
[INFO] [stderr]    Compiling regex v1.1.0
[INFO] [stderr]    Compiling byteorder v1.2.7
[INFO] [stderr]    Compiling memchr v2.1.2
[INFO] [stderr]    Compiling regex-syntax v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.1.0
[INFO] [stderr]    Compiling rand_pcg v0.1.1
[INFO] [stderr]    Compiling rand v0.6.1
[INFO] [stderr]    Compiling syn v0.15.23
[INFO] [stderr]    Compiling log v0.4.6
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_xorshift v0.1.0
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling term v0.5.1
[INFO] [stderr]    Compiling openssl-sys v0.9.40
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling curl-sys v0.4.15
[INFO] [stderr]    Compiling time v0.1.41
[INFO] [stderr]    Compiling socket2 v0.3.8
[INFO] [stderr]    Compiling aho-corasick v0.6.9
[INFO] [stderr]    Compiling chrono v0.4.6
[INFO] [stderr]    Compiling simplelog v0.5.3
[INFO] [stderr]    Compiling serde_derive v1.0.82
[INFO] [stderr]    Compiling curl v0.4.19
[INFO] [stderr]    Compiling serde_json v1.0.33
[INFO] [stderr]    Compiling a-mistake v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(bind_by_move_pattern_guards)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `bind_by_move_pattern_guards` has been stable since 1.39.0 and no longer requires an attribute to enable
[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 `a-mistake` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "296a641ded8377d284cedbad79f8066637371369f3365e58fbd42e3a74b7974e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "296a641ded8377d284cedbad79f8066637371369f3365e58fbd42e3a74b7974e", kill_on_drop: false }`
[INFO] [stdout] 296a641ded8377d284cedbad79f8066637371369f3365e58fbd42e3a74b7974e
