[INFO] cloning repository https://github.com/stevenpack/learnnet
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/stevenpack/learnnet" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstevenpack%2Flearnnet", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstevenpack%2Flearnnet'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ff61a30bae7a50d1dd58226d4f50a43f39244a15
[INFO] checking stevenpack/learnnet against try#4a04890980766cc79878135f5ade8c0c4321e943 for pr-65819
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstevenpack%2Flearnnet" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/stevenpack/learnnet on toolchain 4a04890980766cc79878135f5ade8c0c4321e943
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/stevenpack/learnnet
[INFO] finished tweaking git repo https://github.com/stevenpack/learnnet
[INFO] tweaked toml for git repo https://github.com/stevenpack/learnnet written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/stevenpack/learnnet already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "fetch" "--locked" "--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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mime_guess v2.0.0-alpha.2
[INFO] [stderr]   Downloaded rocket_codegen v0.3.3
[INFO] [stderr]   Downloaded humantime v1.0.0
[INFO] [stderr]   Downloaded reqwest v0.8.0
[INFO] [stderr]   Downloaded hyper v0.11.6
[INFO] [stderr]   Downloaded crc-core v0.1.0
[INFO] [stderr]   Downloaded crc v1.5.0
[INFO] [stderr]   Downloaded rocket v0.3.3
[INFO] [stderr]   Downloaded rocket_contrib v0.3.3
[INFO] [stderr]   Downloaded cookie v0.9.1
[INFO] [stderr]   Downloaded either v1.2.0
[INFO] [stderr]   Downloaded isatty v0.1.3
[INFO] [stderr]   Downloaded serde-value v0.5.1
[INFO] [stderr]   Downloaded log4rs v0.7.0
[INFO] [stderr]   Downloaded openssl v0.9.20
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "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] e31da99a30363cb1f0bb60c9b6e30e521da63998769ade5f2c7502be0a7d12ca
[INFO] running `Command { std: "docker" "start" "-a" "e31da99a30363cb1f0bb60c9b6e30e521da63998769ade5f2c7502be0a7d12ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e31da99a30363cb1f0bb60c9b6e30e521da63998769ade5f2c7502be0a7d12ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e31da99a30363cb1f0bb60c9b6e30e521da63998769ade5f2c7502be0a7d12ca", kill_on_drop: false }`
[INFO] [stdout] e31da99a30363cb1f0bb60c9b6e30e521da63998769ade5f2c7502be0a7d12ca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=forbid" "-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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f18e53cf30e794d095f84748308d4c0191ca1cccc75812cc1269dcaafcd51d0e
[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" "f18e53cf30e794d095f84748308d4c0191ca1cccc75812cc1269dcaafcd51d0e", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.31
[INFO] [stderr]    Compiling version_check v0.1.3
[INFO] [stderr]     Checking byteorder v1.1.0
[INFO] [stderr]    Compiling cc v1.0.1
[INFO] [stderr]     Checking log v0.3.8
[INFO] [stderr]    Compiling either v1.2.0
[INFO] [stderr]    Compiling scopeguard v0.3.2
[INFO] [stderr]    Compiling lazy_static v0.2.9
[INFO] [stderr]     Checking num-traits v0.1.40
[INFO] [stderr]    Compiling futures v0.1.16
[INFO] [stderr]    Compiling gcc v0.3.54
[INFO] [stderr]     Checking percent-encoding v1.0.0
[INFO] [stderr]    Compiling semver v0.1.20
[INFO] [stderr]     Checking matches v0.1.6
[INFO] [stderr]     Checking serde v1.0.15
[INFO] [stderr]     Checking unicode-normalization v0.1.5
[INFO] [stderr]    Compiling yansi v0.3.4
[INFO] [stderr]    Compiling siphasher v0.2.2
[INFO] [stderr]     Checking lazycell v0.5.1
[INFO] [stderr]     Checking slab v0.4.0
[INFO] [stderr]     Checking httparse v1.2.3
[INFO] [stdout] error[E0635]: unknown feature `const_atomic_bool_new`
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/yansi-0.3.4/src/lib.rs:1:40
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![cfg_attr(feature="nightly", feature(const_atomic_bool_new))]
[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 E0635`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `yansi`
[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" "f18e53cf30e794d095f84748308d4c0191ca1cccc75812cc1269dcaafcd51d0e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f18e53cf30e794d095f84748308d4c0191ca1cccc75812cc1269dcaafcd51d0e", kill_on_drop: false }`
[INFO] [stdout] f18e53cf30e794d095f84748308d4c0191ca1cccc75812cc1269dcaafcd51d0e