[INFO] cloning repository https://github.com/xfoxfu/rust-xos
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/xfoxfu/rust-xos" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxfoxfu%2Frust-xos", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxfoxfu%2Frust-xos'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 73b2b3a86a73dd665e149f077e0a83ac6dc9630b
[INFO] testing xfoxfu/rust-xos against master#99e3aef02079e9c10583638520cd0c134dc3a01d for pr-85530
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxfoxfu%2Frust-xos" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/xfoxfu/rust-xos on toolchain 99e3aef02079e9c10583638520cd0c134dc3a01d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-5/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/xfoxfu/rust-xos
[INFO] finished tweaking git repo https://github.com/xfoxfu/rust-xos
[INFO] tweaked toml for git repo https://github.com/xfoxfu/rust-xos written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/xfoxfu/rust-xos already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5558b395a8f20b5c881de3d4066220e05f2a66405bf93f3384ca134bf56755e1
[INFO] running `Command { std: "docker" "start" "-a" "5558b395a8f20b5c881de3d4066220e05f2a66405bf93f3384ca134bf56755e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5558b395a8f20b5c881de3d4066220e05f2a66405bf93f3384ca134bf56755e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5558b395a8f20b5c881de3d4066220e05f2a66405bf93f3384ca134bf56755e1", kill_on_drop: false }`
[INFO] [stdout] 5558b395a8f20b5c881de3d4066220e05f2a66405bf93f3384ca134bf56755e1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 121d4a00132049a130288f4869e0e003cd49f10cd5b7ec26a971faa673d0106b
[INFO] running `Command { std: "docker" "start" "-a" "121d4a00132049a130288f4869e0e003cd49f10cd5b7ec26a971faa673d0106b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.12
[INFO] [stderr]    Compiling syn v1.0.21
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling bit_field v0.10.0
[INFO] [stderr]    Compiling x86_64 v0.11.0
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling zero v0.1.2
[INFO] [stderr]    Compiling rlibc v1.0.0
[INFO] [stderr]    Compiling pc-keyboard v0.5.0
[INFO] [stderr]    Compiling cc v1.0.54
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling x86 v0.33.0
[INFO] [stderr]    Compiling ahash v0.3.8
[INFO] [stderr]    Compiling spin v0.5.2
[INFO] [stderr]    Compiling micromath v1.0.0
[INFO] [stderr]    Compiling lock_api v0.3.4
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/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 xmas-elf v0.7.0
[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 `lock_api`
[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" "121d4a00132049a130288f4869e0e003cd49f10cd5b7ec26a971faa673d0106b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "121d4a00132049a130288f4869e0e003cd49f10cd5b7ec26a971faa673d0106b", kill_on_drop: false }`
[INFO] [stdout] 121d4a00132049a130288f4869e0e003cd49f10cd5b7ec26a971faa673d0106b