[INFO] fetching crate runs_inside_qemu 1.0.4...
[INFO] testing runs_inside_qemu-1.0.4 against 1.55.0 for beta-1.56-1
[INFO] extracting crate runs_inside_qemu 1.0.4 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate runs_inside_qemu 1.0.4 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate runs_inside_qemu 1.0.4
[INFO] finished tweaking crates.io crate runs_inside_qemu 1.0.4
[INFO] tweaked toml for crates.io crate runs_inside_qemu 1.0.4 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate runs_inside_qemu 1.0.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7f9dfc802079a0a84d20dee8be7bbeaffc1d993aab03f7b9502a4e7a43f7b227
[INFO] running `Command { std: "docker" "start" "-a" "7f9dfc802079a0a84d20dee8be7bbeaffc1d993aab03f7b9502a4e7a43f7b227", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7f9dfc802079a0a84d20dee8be7bbeaffc1d993aab03f7b9502a4e7a43f7b227", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f9dfc802079a0a84d20dee8be7bbeaffc1d993aab03f7b9502a4e7a43f7b227", kill_on_drop: false }`
[INFO] [stdout] 7f9dfc802079a0a84d20dee8be7bbeaffc1d993aab03f7b9502a4e7a43f7b227
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b966dd5ffe7abf3ae4b5e7776c91ae3572d9ada21a2aa17b2121ab344a105414
[INFO] running `Command { std: "docker" "start" "-a" "b966dd5ffe7abf3ae4b5e7776c91ae3572d9ada21a2aa17b2121ab344a105414", kill_on_drop: false }`
[INFO] [stderr]    Compiling raw-cpuid v10.2.0
[INFO] [stderr]    Compiling runs_inside_qemu v1.0.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.80s
[INFO] running `Command { std: "docker" "inspect" "b966dd5ffe7abf3ae4b5e7776c91ae3572d9ada21a2aa17b2121ab344a105414", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b966dd5ffe7abf3ae4b5e7776c91ae3572d9ada21a2aa17b2121ab344a105414", kill_on_drop: false }`
[INFO] [stdout] b966dd5ffe7abf3ae4b5e7776c91ae3572d9ada21a2aa17b2121ab344a105414
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] df26e1dc4fba8160307f7ed15d6cf0d3f67e5bd9764d02a5e0a63abea1b0b5bc
[INFO] running `Command { std: "docker" "start" "-a" "df26e1dc4fba8160307f7ed15d6cf0d3f67e5bd9764d02a5e0a63abea1b0b5bc", kill_on_drop: false }`
[INFO] [stderr]    Compiling x86 v0.40.0
[INFO] [stderr]    Compiling bit_field v0.10.1
[INFO] [stderr]    Compiling raw-cpuid v9.1.0
[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/x86-0.40.0/src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(llvm_asm, core_intrinsics)]
[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` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "df26e1dc4fba8160307f7ed15d6cf0d3f67e5bd9764d02a5e0a63abea1b0b5bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df26e1dc4fba8160307f7ed15d6cf0d3f67e5bd9764d02a5e0a63abea1b0b5bc", kill_on_drop: false }`
[INFO] [stdout] df26e1dc4fba8160307f7ed15d6cf0d3f67e5bd9764d02a5e0a63abea1b0b5bc