[INFO] cloning repository https://github.com/kotokz/left-pad-rocket
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kotokz/left-pad-rocket" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkotokz%2Fleft-pad-rocket", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkotokz%2Fleft-pad-rocket'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d656df951f17aa3814575456ef41faef5af94a9a
[INFO] checking kotokz/left-pad-rocket against master#90442458ac46b1d5eed752c316da25450f67285b for pr-81477
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkotokz%2Fleft-pad-rocket" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kotokz/left-pad-rocket on toolchain 90442458ac46b1d5eed752c316da25450f67285b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kotokz/left-pad-rocket
[INFO] finished tweaking git repo https://github.com/kotokz/left-pad-rocket
[INFO] tweaked toml for git repo https://github.com/kotokz/left-pad-rocket written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/kotokz/left-pad-rocket already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "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-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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b6f4dbb002ab77aaa347ee3c4b712aadaf5957c97965fb9829f5004d762d0c80
[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" "b6f4dbb002ab77aaa347ee3c4b712aadaf5957c97965fb9829f5004d762d0c80", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b6f4dbb002ab77aaa347ee3c4b712aadaf5957c97965fb9829f5004d762d0c80", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b6f4dbb002ab77aaa347ee3c4b712aadaf5957c97965fb9829f5004d762d0c80", kill_on_drop: false }`
[INFO] [stdout] b6f4dbb002ab77aaa347ee3c4b712aadaf5957c97965fb9829f5004d762d0c80
[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=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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d619e2f238a8e2bd3d839d7962ee15dc9db1961c96dbb9458e6a3f2f42d00813
[INFO] running `Command { std: "docker" "start" "-a" "d619e2f238a8e2bd3d839d7962ee15dc9db1961c96dbb9458e6a3f2f42d00813", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.29
[INFO] [stderr]    Compiling version_check v0.1.3
[INFO] [stderr]    Compiling rayon-core v1.2.1
[INFO] [stderr]    Compiling yansi v0.3.2
[INFO] [stderr]     Checking matches v0.1.6
[INFO] [stderr]     Checking byteorder v1.1.0
[INFO] [stderr]     Checking unicode-normalization v0.1.5
[INFO] [stderr]    Compiling percent-encoding v1.0.0
[INFO] [stderr]     Checking untrusted v0.5.0
[INFO] [stderr]     Checking safemem v0.2.0
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]     Checking log v0.3.8
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/yansi-0.3.2/src/lib.rs:1:40
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![cfg_attr(feature="nightly", feature(const_fn))]
[INFO] [stdout]   |                                        ^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: split into finer-grained feature gates
[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 E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `yansi`
[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] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "d619e2f238a8e2bd3d839d7962ee15dc9db1961c96dbb9458e6a3f2f42d00813", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d619e2f238a8e2bd3d839d7962ee15dc9db1961c96dbb9458e6a3f2f42d00813", kill_on_drop: false }`
[INFO] [stdout] d619e2f238a8e2bd3d839d7962ee15dc9db1961c96dbb9458e6a3f2f42d00813