[INFO] cloning repository https://github.com/nirya-istari/dumb_os
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nirya-istari/dumb_os" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnirya-istari%2Fdumb_os", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnirya-istari%2Fdumb_os'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7b6c9c7b9f150e154c6d225c131ec2d8c3c15267
[INFO] checking nirya-istari/dumb_os against master#506512391b1a75ae450d36c9420978402a91abcc for pr-125384
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnirya-istari%2Fdumb_os" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nirya-istari/dumb_os on toolchain 506512391b1a75ae450d36c9420978402a91abcc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-2-tc1/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/nirya-istari/dumb_os
[INFO] finished tweaking git repo https://github.com/nirya-istari/dumb_os
[INFO] tweaked toml for git repo https://github.com/nirya-istari/dumb_os written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/nirya-istari/dumb_os already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cpuio v0.3.0
[INFO] [stderr]   Downloaded x86_64 v0.14.0
[INFO] [stderr]   Downloaded pic8259_simple v0.2.0
[INFO] [stderr]   Downloaded pc-keyboard v0.5.1
[INFO] [stderr]   Downloaded rand_pcg v0.3.0
[INFO] [stderr]   Downloaded volatile v0.4.4
[INFO] [stderr]   Downloaded field-offset v0.3.3
[INFO] [stderr]   Downloaded spin v0.9.0
[INFO] [stderr]   Downloaded linked_list_allocator v0.8.11
[INFO] [stderr]   Downloaded ux v0.1.3
[INFO] [stderr]   Downloaded bootloader v0.10.1
[INFO] [stderr]   Downloaded rsdp v1.1.0
[INFO] [stderr]   Downloaded acpi v2.3.1
[INFO] [stderr]   Downloaded conquer-util v0.3.0
[INFO] [stderr]   Downloaded conquer-once v0.3.2
[INFO] [stderr]   Downloaded spinning_top v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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:beeedbb442662e57d416641ecc3200b38e573c25b057896194468d05594dd835" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f2d1175817c9a8c0b333fd9d71b7f3353e9fa0c6a33c439264bf688100fc9eb0
[INFO] running `Command { std: "docker" "start" "-a" "f2d1175817c9a8c0b333fd9d71b7f3353e9fa0c6a33c439264bf688100fc9eb0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f2d1175817c9a8c0b333fd9d71b7f3353e9fa0c6a33c439264bf688100fc9eb0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2d1175817c9a8c0b333fd9d71b7f3353e9fa0c6a33c439264bf688100fc9eb0", kill_on_drop: false }`
[INFO] [stdout] f2d1175817c9a8c0b333fd9d71b7f3353e9fa0c6a33c439264bf688100fc9eb0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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=allow" "-e" "RUSTDOCFLAGS=--cap-lints=allow" "-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:beeedbb442662e57d416641ecc3200b38e573c25b057896194468d05594dd835" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2dc8360d94e2a81bdd2eab754eb0900be2b24006270441546dc928f9160208d2
[INFO] running `Command { std: "docker" "start" "-a" "2dc8360d94e2a81bdd2eab754eb0900be2b24006270441546dc928f9160208d2", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling memoffset v0.6.3
[INFO] [stderr]    Compiling crossbeam-utils v0.8.3
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling syn v1.0.70
[INFO] [stderr]    Compiling proc-macro-nested v0.1.7
[INFO] [stderr]     Checking futures-core v0.3.14
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking futures-sink v0.3.14
[INFO] [stderr]    Compiling bootloader v0.10.1
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]     Checking futures-task v0.3.14
[INFO] [stderr]     Checking pin-project-lite v0.2.6
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/lock_api-0.3.4/src/lib.rs:91:42
[INFO] [stdout]    |
[INFO] [stdout] 91 | #![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] [stderr]    Compiling x86_64 v0.14.0
[INFO] [stderr]     Checking rsdp v1.1.0
[INFO] [stderr]     Checking futures-channel v0.3.14
[INFO] [stderr]     Checking lock_api v0.4.3
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]     Checking bit_field v0.9.0
[INFO] [stderr]     Checking futures-io v0.3.14
[INFO] [stderr]     Checking conquer-util v0.3.0
[INFO] [stdout] error: aborting due to 1 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 `lock_api` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "2dc8360d94e2a81bdd2eab754eb0900be2b24006270441546dc928f9160208d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2dc8360d94e2a81bdd2eab754eb0900be2b24006270441546dc928f9160208d2", kill_on_drop: false }`
[INFO] [stdout] 2dc8360d94e2a81bdd2eab754eb0900be2b24006270441546dc928f9160208d2