[INFO] cloning repository https://github.com/Renmusxd/PyIsingMonteCarlo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Renmusxd/PyIsingMonteCarlo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRenmusxd%2FPyIsingMonteCarlo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRenmusxd%2FPyIsingMonteCarlo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b8df3949de15e84c0c8274720da3783954bc44ca
[INFO] testing Renmusxd/PyIsingMonteCarlo against beta-2021-08-01 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRenmusxd%2FPyIsingMonteCarlo" "/workspace/builds/worker-45/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-45/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Renmusxd/PyIsingMonteCarlo on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-45/source/.cargo/config
[INFO] removed /workspace/builds/worker-45/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/Renmusxd/PyIsingMonteCarlo
[INFO] finished tweaking git repo https://github.com/Renmusxd/PyIsingMonteCarlo
[INFO] tweaked toml for git repo https://github.com/Renmusxd/PyIsingMonteCarlo written to /workspace/builds/worker-45/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "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" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pyo3-macros v0.14.1
[INFO] [stderr]   Downloaded pyo3-build-config v0.14.1
[INFO] [stderr]   Downloaded pyo3-macros-backend v0.14.1
[INFO] [stderr]   Downloaded numpy v0.14.1
[INFO] [stderr]   Downloaded pyo3 v0.14.1
[INFO] [stderr]   Downloaded ndarray v0.15.3
[INFO] [stderr]   Downloaded qmc v2.19.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-45/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-45/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2d9f7af1322d2f347a674e3664e9a6d9023452504dc986bb6cc2e9c620b52c65
[INFO] running `Command { std: "docker" "start" "-a" "2d9f7af1322d2f347a674e3664e9a6d9023452504dc986bb6cc2e9c620b52c65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2d9f7af1322d2f347a674e3664e9a6d9023452504dc986bb6cc2e9c620b52c65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d9f7af1322d2f347a674e3664e9a6d9023452504dc986bb6cc2e9c620b52c65", kill_on_drop: false }`
[INFO] [stdout] 2d9f7af1322d2f347a674e3664e9a6d9023452504dc986bb6cc2e9c620b52c65
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-45/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-45/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9c208df532df8405f168e97a429753828fcaeea80f5a6b10a13d226f6aec173c
[INFO] running `Command { std: "docker" "start" "-a" "9c208df532df8405f168e97a429753828fcaeea80f5a6b10a13d226f6aec173c", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling pyo3-build-config v0.14.1
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling once_cell v1.8.0
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling unindent v0.1.7
[INFO] [stderr]    Compiling rawpointer v0.2.1
[INFO] [stderr]    Compiling strength_reduce v0.2.3
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling half v1.7.1
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling paste-impl v0.1.18
[INFO] [stderr]    Compiling matrixmultiply v0.3.1
[INFO] [stderr]    Compiling lock_api v0.4.4
[INFO] [stderr]    Compiling instant v0.1.10
[INFO] [stderr]    Compiling itertools v0.10.1
[INFO] [stderr]    Compiling crossbeam-channel v0.5.1
[INFO] [stderr]    Compiling paste v0.1.18
[INFO] [stderr]    Compiling pyo3 v0.14.1
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling crossbeam-deque v0.8.1
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling num-complex v0.4.0
[INFO] [stderr]    Compiling primal-check v0.3.1
[INFO] [stderr]    Compiling transpose v0.2.1
[INFO] [stderr]    Compiling rustfft v6.0.1
[INFO] [stderr]    Compiling ndarray v0.15.3
[INFO] [stderr]    Compiling pyo3-macros-backend v0.14.1
[INFO] [stderr]    Compiling indoc-impl v0.3.6
[INFO] [stderr]    Compiling pyo3-macros v0.14.1
[INFO] [stderr]    Compiling indoc v0.3.6
[INFO] [stderr]    Compiling smallvec v1.6.1
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling serde_cbor v0.11.1
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/smallvec-1.6.1/src/lib.rs:75:41
[INFO] [stdout]    |
[INFO] [stdout] 75 | #![cfg_attr(feature = "specialization", feature(specialization))]
[INFO] [stdout]    |                                         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `smallvec` due to 2 previous errors
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "9c208df532df8405f168e97a429753828fcaeea80f5a6b10a13d226f6aec173c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c208df532df8405f168e97a429753828fcaeea80f5a6b10a13d226f6aec173c", kill_on_drop: false }`
[INFO] [stdout] 9c208df532df8405f168e97a429753828fcaeea80f5a6b10a13d226f6aec173c
