[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] 7c63d1c9bcea001c8749180e561b3134ce83b337
[INFO] documenting Renmusxd/PyIsingMonteCarlo against 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRenmusxd%2FPyIsingMonteCarlo" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Renmusxd/PyIsingMonteCarlo on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-2/source/.cargo/config
[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-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6dab985c69cf8c1e529044c2456366469bc2192e2e71c0e37207706fcabfa6f3
[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" "6dab985c69cf8c1e529044c2456366469bc2192e2e71c0e37207706fcabfa6f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6dab985c69cf8c1e529044c2456366469bc2192e2e71c0e37207706fcabfa6f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6dab985c69cf8c1e529044c2456366469bc2192e2e71c0e37207706fcabfa6f3", kill_on_drop: false }`
[INFO] [stdout] 6dab985c69cf8c1e529044c2456366469bc2192e2e71c0e37207706fcabfa6f3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "RUSTDOCFLAGS=--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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5929fdc1275ba10b6b92351681be573bce986bebb3f35a32653ad2495a6b2730
[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" "5929fdc1275ba10b6b92351681be573bce986bebb3f35a32653ad2495a6b2730", kill_on_drop: false }`
[INFO] [stderr]    Compiling pyo3 v0.11.1
[INFO] [stderr]    Compiling ndarray v0.13.1
[INFO] [stderr]     Checking strength_reduce v0.2.3
[INFO] [stderr]     Checking transpose v0.1.0
[INFO] [stderr]     Checking smallvec v1.4.2
[INFO] [stderr]     Checking serde_cbor v0.11.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking rustfft v3.0.1
[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/smallvec-1.4.2/src/lib.rs:74:32
[INFO] [stdout]    |
[INFO] [stdout] 74 | #![cfg_attr(feature = "union", feature(untagged_unions))]
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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/smallvec-1.4.2/src/lib.rs:76:41
[INFO] [stdout]    |
[INFO] [stdout] 76 | #![cfg_attr(feature = "specialization", feature(specialization))]
[INFO] [stdout]    |                                         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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/smallvec-1.4.2/src/lib.rs:78:41
[INFO] [stdout]    |
[INFO] [stdout] 78 | #![cfg_attr(feature = "const_generics", feature(min_const_generics))]
[INFO] [stdout]    |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: const generics are unstable
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/smallvec-1.4.2/src/lib.rs:1910:22
[INFO] [stdout]      |
[INFO] [stdout] 1910 | unsafe impl<T, const N: usize> Array for [T; N] {
[INFO] [stdout]      |                      ^
[INFO] [stdout]      |
[INFO] [stdout]      = note: see issue #44580 <https://github.com/rust-lang/rust/issues/44580> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `smallvec`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "5929fdc1275ba10b6b92351681be573bce986bebb3f35a32653ad2495a6b2730", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5929fdc1275ba10b6b92351681be573bce986bebb3f35a32653ad2495a6b2730", kill_on_drop: false }`
[INFO] [stdout] 5929fdc1275ba10b6b92351681be573bce986bebb3f35a32653ad2495a6b2730