[INFO] cloning repository https://github.com/christiankuhl/pythonos
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/christiankuhl/pythonos" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchristiankuhl%2Fpythonos", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchristiankuhl%2Fpythonos'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3f8b7fa6a0b82c64a15f2d785377b6e4428091fd
[INFO] testing christiankuhl/pythonos against 1.59.0 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchristiankuhl%2Fpythonos" "/workspace/builds/worker-29/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-29/source'...
[INFO] [stderr] done.
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[INFO] validating manifest of git repo https://github.com/christiankuhl/pythonos on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-29/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-29/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/christiankuhl/pythonos
[INFO] finished tweaking git repo https://github.com/christiankuhl/pythonos
[INFO] tweaked toml for git repo https://github.com/christiankuhl/pythonos written to /workspace/builds/worker-29/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "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-29/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 73ce5eaf424f6b6db22edfb074d2d173a1f84f2b33658fb5325791371a4f9e68
[INFO] running `Command { std: "docker" "start" "-a" "73ce5eaf424f6b6db22edfb074d2d173a1f84f2b33658fb5325791371a4f9e68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "73ce5eaf424f6b6db22edfb074d2d173a1f84f2b33658fb5325791371a4f9e68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73ce5eaf424f6b6db22edfb074d2d173a1f84f2b33658fb5325791371a4f9e68", kill_on_drop: false }`
[INFO] [stdout] 73ce5eaf424f6b6db22edfb074d2d173a1f84f2b33658fb5325791371a4f9e68
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f588e03c4402e1edeab93a9022d535ef91e0accd1b550238ebae91fa229faa1a
[INFO] running `Command { std: "docker" "start" "-a" "f588e03c4402e1edeab93a9022d535ef91e0accd1b550238ebae91fa229faa1a", kill_on_drop: false }`
[INFO] [stderr]    Compiling x86_64 v0.14.8
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling volatile v0.4.4
[INFO] [stderr]    Compiling bit_field v0.10.1
[INFO] [stderr]    Compiling volatile v0.2.7
[INFO] [stderr]    Compiling pc-keyboard v0.5.1
[INFO] [stderr]    Compiling elf v0.1.0 (/opt/rustwide/workdir/userland/libraries/elf)
[INFO] [stderr]    Compiling lock_api v0.4.6
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling jobserver v0.1.24
[INFO] [stderr]    Compiling spin v0.9.2
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/x86_64-0.14.8/src/lib.rs:8:45
[INFO] [stdout]   |
[INFO] [stdout] 8 | #![cfg_attr(feature = "inline_asm", feature(asm))]
[INFO] [stdout]   |                                             ^^^
[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 E0554`.
[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" "f588e03c4402e1edeab93a9022d535ef91e0accd1b550238ebae91fa229faa1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f588e03c4402e1edeab93a9022d535ef91e0accd1b550238ebae91fa229faa1a", kill_on_drop: false }`
[INFO] [stdout] f588e03c4402e1edeab93a9022d535ef91e0accd1b550238ebae91fa229faa1a