[INFO] cloning repository https://github.com/binary-rusty-hermit/uhyve
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/binary-rusty-hermit/uhyve" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbinary-rusty-hermit%2Fuhyve", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbinary-rusty-hermit%2Fuhyve'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5dad759d8f9e7a9be452bbdcd9a0788af19e4a22
[INFO] checking binary-rusty-hermit/uhyve against 1.55.0 for beta-1.56-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbinary-rusty-hermit%2Fuhyve" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/binary-rusty-hermit/uhyve 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] removed /workspace/builds/worker-0/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/binary-rusty-hermit/uhyve
[INFO] finished tweaking git repo https://github.com/binary-rusty-hermit/uhyve
[INFO] tweaked toml for git repo https://github.com/binary-rusty-hermit/uhyve written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/binary-rusty-hermit/uhyve 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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded raw-cpuid v9.0.0
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.71
[INFO] [stderr]   Downloaded strum_macros v0.8.0
[INFO] [stderr]   Downloaded plotters-svg v0.3.0
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.71
[INFO] [stderr]   Downloaded js-sys v0.3.48
[INFO] [stderr]   Downloaded goblin v0.2.3
[INFO] [stderr]   Downloaded kvm-ioctls v0.6.1
[INFO] [stderr]   Downloaded bstr v0.2.15
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.71
[INFO] [stderr]   Downloaded gdb-protocol v0.1.0
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.71
[INFO] [stderr]   Downloaded crossbeam-epoch v0.9.3
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.71
[INFO] [stderr]   Downloaded xhypervisor v0.0.12
[INFO] [stderr]   Downloaded crossbeam-utils v0.8.3
[INFO] [stderr]   Downloaded serde_derive v1.0.123
[INFO] [stderr]   Downloaded plain v0.2.3
[INFO] [stderr]   Downloaded web-sys v0.3.48
[INFO] [stderr]   Downloaded nix v0.18.0
[INFO] [stderr]   Downloaded vmm-sys-util v0.7.0
[INFO] [stderr]   Downloaded tun-tap v0.1.2
[INFO] [stderr]   Downloaded strum v0.8.0
[INFO] [stderr]   Downloaded csv v1.1.5
[INFO] [stderr]   Downloaded libc v0.2.87
[INFO] [stderr]   Downloaded plotters v0.3.0
[INFO] [stderr]   Downloaded serde v1.0.123
[INFO] [stderr]   Downloaded tinytemplate v1.2.0
[INFO] [stderr]   Downloaded plotters-backend v0.3.0
[INFO] [stderr]   Downloaded aligned_alloc v0.1.3
[INFO] [stderr]   Downloaded kvm-bindings v0.3.1
[INFO] [stderr]   Downloaded x86 v0.36.0
[INFO] [stderr]   Downloaded burst v0.0.2
[INFO] [stderr]   Downloaded virtio-bindings v0.1.0
[INFO] [stderr]   Downloaded mac_address v1.0.4
[INFO] [stderr]   Downloaded bit_field v0.10.1
[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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 4dc92ac8d458f2f4d3a1fd877080c4cd621dbd94da33898dcad568496b13374f
[INFO] running `Command { std: "docker" "start" "-a" "4dc92ac8d458f2f4d3a1fd877080c4cd621dbd94da33898dcad568496b13374f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4dc92ac8d458f2f4d3a1fd877080c4cd621dbd94da33898dcad568496b13374f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4dc92ac8d458f2f4d3a1fd877080c4cd621dbd94da33898dcad568496b13374f", kill_on_drop: false }`
[INFO] [stdout] 4dc92ac8d458f2f4d3a1fd877080c4cd621dbd94da33898dcad568496b13374f
[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" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3bb6ec51f88f2fc8907bd8bfd2f095d9d44acba54cf74e1e45f134c63a43ba5b
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "3bb6ec51f88f2fc8907bd8bfd2f095d9d44acba54cf74e1e45f134c63a43ba5b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.87
[INFO] [stderr]    Compiling mac_address v1.0.4
[INFO] [stderr]    Compiling x86 v0.36.0
[INFO] [stderr]     Checking bit_field v0.10.1
[INFO] [stderr]     Checking plain v0.2.3
[INFO] [stderr]     Checking plotters-backend v0.3.0
[INFO] [stderr]     Checking virtio-bindings v0.1.0
[INFO] [stderr]     Checking strum v0.8.0
[INFO] [stderr]     Checking burst v0.0.2
[INFO] [stderr]    Compiling tun-tap v0.1.2
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]    Compiling raw-cpuid v8.1.2
[INFO] [stderr]     Checking raw-cpuid v9.0.0
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking gdb-protocol v0.1.0
[INFO] [stderr]     Checking serde_cbor v0.11.1
[INFO] [stderr]    Compiling strum_macros v0.8.0
[INFO] [stderr]     Checking serde_json v1.0.64
[INFO] [stderr]     Checking regex v1.4.3
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]     Checking bstr v0.2.15
[INFO] [stderr]     Checking criterion-plot v0.4.3
[INFO] [stderr]     Checking plotters-svg v0.3.0
[INFO] [stderr]     Checking plotters v0.3.0
[INFO] [stderr]     Checking csv v1.1.5
[INFO] [stderr]     Checking tinytemplate v1.2.0
[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/x86-0.36.0/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] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "3bb6ec51f88f2fc8907bd8bfd2f095d9d44acba54cf74e1e45f134c63a43ba5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3bb6ec51f88f2fc8907bd8bfd2f095d9d44acba54cf74e1e45f134c63a43ba5b", kill_on_drop: false }`
[INFO] [stdout] 3bb6ec51f88f2fc8907bd8bfd2f095d9d44acba54cf74e1e45f134c63a43ba5b
