[INFO] cloning repository https://github.com/egergo/kermit-kernel-first
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/egergo/kermit-kernel-first" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fegergo%2Fkermit-kernel-first", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fegergo%2Fkermit-kernel-first'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3c6e9da305384f94cccf72b340fff8c4e5c1fd3e
[INFO] checking egergo/kermit-kernel-first against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fegergo%2Fkermit-kernel-first" "/workspace/builds/worker-95/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-95/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/egergo/kermit-kernel-first on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/egergo/kermit-kernel-first
[INFO] finished tweaking git repo https://github.com/egergo/kermit-kernel-first
[INFO] tweaked toml for git repo https://github.com/egergo/kermit-kernel-first written to /workspace/builds/worker-95/source/Cargo.toml
[INFO] crate git repo https://github.com/egergo/kermit-kernel-first already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "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 multiboot2 v0.7.1
[INFO] [stderr]   Downloaded x86_64 v0.2.11
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-95/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-95/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" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c127abfa4ba3c0cd6aee25467bbd2b4b03aad210249202aa4424eb26c61ac541
[INFO] running `Command { std: "docker" "start" "-a" "c127abfa4ba3c0cd6aee25467bbd2b4b03aad210249202aa4424eb26c61ac541", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c127abfa4ba3c0cd6aee25467bbd2b4b03aad210249202aa4424eb26c61ac541", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c127abfa4ba3c0cd6aee25467bbd2b4b03aad210249202aa4424eb26c61ac541", kill_on_drop: false }`
[INFO] [stdout] c127abfa4ba3c0cd6aee25467bbd2b4b03aad210249202aa4424eb26c61ac541
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-95/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-95/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" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d5fae289156b98cd21922e8c8cfa92fb1ac99bd1cd6e6d9b583517b536951f2c
[INFO] running `Command { std: "docker" "start" "-a" "d5fae289156b98cd21922e8c8cfa92fb1ac99bd1cd6e6d9b583517b536951f2c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking bitflags v1.0.4
[INFO] [stderr]     Checking ux v0.1.2
[INFO] [stderr]     Checking bit_field v0.9.0
[INFO] [stderr]     Checking usize_conversions v0.2.0
[INFO] [stderr]     Checking spin v0.4.9
[INFO] [stderr]     Checking os_bootinfo v0.2.1
[INFO] [stderr]    Compiling lazy_static v1.1.0
[INFO] [stderr]     Checking multiboot2 v0.7.1
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/spin-0.4.9/src/lib.rs:6:43
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![cfg_attr(feature = "const_fn", 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[E0557]: feature has been removed
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/spin-0.4.9/src/lib.rs:6:43
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![cfg_attr(feature = "const_fn", 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 `spin` due to 2 previous errors
[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 E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "d5fae289156b98cd21922e8c8cfa92fb1ac99bd1cd6e6d9b583517b536951f2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5fae289156b98cd21922e8c8cfa92fb1ac99bd1cd6e6d9b583517b536951f2c", kill_on_drop: false }`
[INFO] [stdout] d5fae289156b98cd21922e8c8cfa92fb1ac99bd1cd6e6d9b583517b536951f2c