[INFO] cloning repository https://github.com/kacejot/kernel
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kacejot/kernel" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkacejot%2Fkernel", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkacejot%2Fkernel'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 303243e2134eb53fed8ef6ad57cfb66c0ec488d5
[INFO] testing kacejot/kernel against try#722e1797249a965b6335aebd65d777f917e498f1 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkacejot%2Fkernel" "/workspace/builds/worker-42/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-42/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kacejot/kernel on toolchain 722e1797249a965b6335aebd65d777f917e498f1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kacejot/kernel
[INFO] finished tweaking git repo https://github.com/kacejot/kernel
[INFO] tweaked toml for git repo https://github.com/kacejot/kernel written to /workspace/builds/worker-42/source/Cargo.toml
[INFO] crate git repo https://github.com/kacejot/kernel already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "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 tock-registers v0.5.0
[INFO] [stderr]   Downloaded register v0.5.0
[INFO] [stderr]   Downloaded cortex-a v2.9.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6286157d1511241d1b0acdbaa5f3a2f5e033be2cac9abc0b5e97638328b77148
[INFO] running `Command { std: "docker" "start" "-a" "6286157d1511241d1b0acdbaa5f3a2f5e033be2cac9abc0b5e97638328b77148", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6286157d1511241d1b0acdbaa5f3a2f5e033be2cac9abc0b5e97638328b77148", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6286157d1511241d1b0acdbaa5f3a2f5e033be2cac9abc0b5e97638328b77148", kill_on_drop: false }`
[INFO] [stdout] 6286157d1511241d1b0acdbaa5f3a2f5e033be2cac9abc0b5e97638328b77148
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3d4d61c28841467b450459e212933b12ef24b01ef34c265cfc670d9171b8b3bc
[INFO] running `Command { std: "docker" "start" "-a" "3d4d61c28841467b450459e212933b12ef24b01ef34c265cfc670d9171b8b3bc", kill_on_drop: false }`
[INFO] [stderr]    Compiling tock-registers v0.5.0
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/tock-registers-0.5.0/src/lib.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![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 `tock-registers` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "3d4d61c28841467b450459e212933b12ef24b01ef34c265cfc670d9171b8b3bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d4d61c28841467b450459e212933b12ef24b01ef34c265cfc670d9171b8b3bc", kill_on_drop: false }`
[INFO] [stdout] 3d4d61c28841467b450459e212933b12ef24b01ef34c265cfc670d9171b8b3bc