[INFO] cloning repository https://github.com/cipepser/blog_os
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cipepser/blog_os" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcipepser%2Fblog_os", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcipepser%2Fblog_os'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 87ea94b838bbd3ef65a0163bbb92f60dd1ee12a2
[INFO] testing cipepser/blog_os against master#62efba8a050c64249dab942951bb28f710208bc8 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcipepser%2Fblog_os" "/workspace/builds/worker-98/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-98/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cipepser/blog_os on toolchain 62efba8a050c64249dab942951bb28f710208bc8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-98/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-98/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/cipepser/blog_os
[INFO] removed 0 missing tests
[INFO] finished tweaking git repo https://github.com/cipepser/blog_os
[INFO] tweaked toml for git repo https://github.com/cipepser/blog_os written to /workspace/builds/worker-98/source/Cargo.toml
[INFO] crate git repo https://github.com/cipepser/blog_os already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "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-98/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-98/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] aa89b8e27962e12220f1b71cf7bd7869eb5f6b9ac3b652cdb85d7c6f4b95859e
[INFO] running `Command { std: "docker" "start" "-a" "aa89b8e27962e12220f1b71cf7bd7869eb5f6b9ac3b652cdb85d7c6f4b95859e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aa89b8e27962e12220f1b71cf7bd7869eb5f6b9ac3b652cdb85d7c6f4b95859e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa89b8e27962e12220f1b71cf7bd7869eb5f6b9ac3b652cdb85d7c6f4b95859e", kill_on_drop: false }`
[INFO] [stdout] aa89b8e27962e12220f1b71cf7bd7869eb5f6b9ac3b652cdb85d7c6f4b95859e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-98/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-98/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1c8e0cc60efaee6b1485b34b6da970ff98844ebb8e30ee7d7a44b1583a4625ed
[INFO] running `Command { std: "docker" "start" "-a" "1c8e0cc60efaee6b1485b34b6da970ff98844ebb8e30ee7d7a44b1583a4625ed", 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]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling x86_64 v0.14.0
[INFO] [stderr]    Compiling bit_field v0.9.0
[INFO] [stderr]    Compiling bootloader v0.9.17
[INFO] [stderr]    Compiling volatile v0.4.4
[INFO] [stderr]    Compiling x86_64 v0.13.6
[INFO] [stderr]    Compiling spin v0.5.2
[INFO] [stderr]    Compiling volatile v0.2.7
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/x86_64-0.13.6/src/lib.rs:5:43
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![cfg_attr(feature = "const_fn", feature(const_fn))] // Needed for generic access to associated consts
[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 `x86_64` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "1c8e0cc60efaee6b1485b34b6da970ff98844ebb8e30ee7d7a44b1583a4625ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c8e0cc60efaee6b1485b34b6da970ff98844ebb8e30ee7d7a44b1583a4625ed", kill_on_drop: false }`
[INFO] [stdout] 1c8e0cc60efaee6b1485b34b6da970ff98844ebb8e30ee7d7a44b1583a4625ed