[INFO] cloning repository https://github.com/1p1pd/gradebot
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/1p1pd/gradebot" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F1p1pd%2Fgradebot", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F1p1pd%2Fgradebot'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d67d6fdd4fe5bdcbbe67334fd6083806f04f990e
[INFO] checking 1p1pd/gradebot against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F1p1pd%2Fgradebot" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/1p1pd/gradebot on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/1p1pd/gradebot
[INFO] finished tweaking git repo https://github.com/1p1pd/gradebot
[INFO] tweaked toml for git repo https://github.com/1p1pd/gradebot written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/1p1pd/gradebot already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] error: the lock file /workspace/builds/worker-4/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d0fa9877854c38657ab70e1bf5f1e0e4c016b88627c645b8fe04de2c38b445fd
[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" "d0fa9877854c38657ab70e1bf5f1e0e4c016b88627c645b8fe04de2c38b445fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d0fa9877854c38657ab70e1bf5f1e0e4c016b88627c645b8fe04de2c38b445fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0fa9877854c38657ab70e1bf5f1e0e4c016b88627c645b8fe04de2c38b445fd", kill_on_drop: false }`
[INFO] [stdout] d0fa9877854c38657ab70e1bf5f1e0e4c016b88627c645b8fe04de2c38b445fd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=forbid" "-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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 55a5541a2fae7299c7fc1f56f28eeb62de88f26cae4618c48b07f393dbad0410
[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" "55a5541a2fae7299c7fc1f56f28eeb62de88f26cae4618c48b07f393dbad0410", kill_on_drop: false }`
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking tinyvec_macros v0.1.0
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]    Compiling pq-sys v0.2.7
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]     Checking regex-syntax v0.3.9
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]     Checking utf8-ranges v0.1.3
[INFO] [stderr]     Checking traitobject v0.0.1
[INFO] [stderr]     Checking lazy_static v0.1.16
[INFO] [stderr]    Compiling byteorder v0.3.13
[INFO] [stderr]    Compiling diesel_codegen v0.6.2
[INFO] [stderr]    Compiling const_fn v0.4.3
[INFO] [stderr]     Checking modifier v0.1.0
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking pest v0.3.3
[INFO] [stderr]     Checking route-recognizer v0.1.13
[INFO] [stderr]     Checking maplit v0.1.6
[INFO] [stderr]    Compiling standback v0.2.11
[INFO] [stderr]    Compiling time v0.2.22
[INFO] [stderr]     Checking unicode-bidi v0.2.6
[INFO] [stderr]     Checking unsafe-any v0.4.2
[INFO] [stderr]     Checking error v0.1.9
[INFO] [stderr]     Checking conduit-mime-types v0.7.3
[INFO] [stderr]     Checking tinyvec v1.0.1
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]     Checking typemap v0.3.3
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking num_cpus v0.2.13
[INFO] [stderr]     Checking unicase v1.4.2
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]     Checking uuid v0.2.3
[INFO] [stderr]     Checking plugin v0.2.6
[INFO] [stderr]     Checking diesel v0.6.2
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking walkdir v0.1.8
[INFO] [stderr]     Checking thread_local v0.2.7
[INFO] [stderr]     Checking hpack v0.2.0
[INFO] [stderr]     Checking mime v0.2.6
[INFO] [stderr]     Checking regex v0.1.80
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/diesel-0.6.2/src/lib.rs:5:35
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![cfg_attr(feature = "unstable", feature(specialization))]
[INFO] [stdout]   |                                   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking solicit v0.4.4
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking unicode-normalization v0.1.14
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/diesel-0.6.2/src/lib.rs:5:35
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![cfg_attr(feature = "unstable", feature(specialization))]
[INFO] [stdout]   |                                   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking handlebars v0.18.2
[INFO] [stderr]     Checking dotenv v0.8.0
[INFO] [stderr]     Checking env_logger v0.3.5
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking url v0.5.10
[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 `diesel`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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: build failed
[INFO] running `Command { std: "docker" "inspect" "55a5541a2fae7299c7fc1f56f28eeb62de88f26cae4618c48b07f393dbad0410", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55a5541a2fae7299c7fc1f56f28eeb62de88f26cae4618c48b07f393dbad0410", kill_on_drop: false }`
[INFO] [stdout] 55a5541a2fae7299c7fc1f56f28eeb62de88f26cae4618c48b07f393dbad0410