[INFO] cloning repository https://github.com/IndianBoy42/AdventOfCode2020
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/IndianBoy42/AdventOfCode2020" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FIndianBoy42%2FAdventOfCode2020", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FIndianBoy42%2FAdventOfCode2020'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7b4a5ad42803e53e968d5f28be9db47c16671cde
[INFO] testing IndianBoy42/AdventOfCode2020 against master#99e3aef02079e9c10583638520cd0c134dc3a01d for pr-85530
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FIndianBoy42%2FAdventOfCode2020" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/IndianBoy42/AdventOfCode2020 on toolchain 99e3aef02079e9c10583638520cd0c134dc3a01d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/IndianBoy42/AdventOfCode2020
[INFO] finished tweaking git repo https://github.com/IndianBoy42/AdventOfCode2020
[INFO] tweaked toml for git repo https://github.com/IndianBoy42/AdventOfCode2020 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/IndianBoy42/AdventOfCode2020 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0a50fd3552d0634cd35b087876ce9c0ce627bfeb39f049675822e94746917bbf
[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" "0a50fd3552d0634cd35b087876ce9c0ce627bfeb39f049675822e94746917bbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0a50fd3552d0634cd35b087876ce9c0ce627bfeb39f049675822e94746917bbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a50fd3552d0634cd35b087876ce9c0ce627bfeb39f049675822e94746917bbf", kill_on_drop: false }`
[INFO] [stdout] 0a50fd3552d0634cd35b087876ce9c0ce627bfeb39f049675822e94746917bbf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 635ca07d66c650812c682d36faee3f94b33ee7cc515db60b47df9e50c3057e45
[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" "635ca07d66c650812c682d36faee3f94b33ee7cc515db60b47df9e50c3057e45", kill_on_drop: false }`
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling rayon-core v1.9.0
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling typenum v1.13.0
[INFO] [stderr]    Compiling rawpointer v0.2.1
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling ndarray v0.14.0
[INFO] [stderr]    Compiling paste v1.0.5
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling regex-syntax v0.6.23
[INFO] [stderr]    Compiling nohash-hasher v0.2.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling crossbeam-utils v0.8.3
[INFO] [stderr]    Compiling memoffset v0.6.2
[INFO] [stderr]    Compiling num-bigint v0.4.0
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]    Compiling num-rational v0.3.2
[INFO] [stderr]    Compiling matrixmultiply v0.3.0
[INFO] [stderr]    Compiling matrixmultiply v0.2.4
[INFO] [stderr]    Compiling itertools v0.10.0
[INFO] [stderr]    Compiling fxhash v0.2.1
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.3
[INFO] [stderr]    Compiling crossbeam-channel v0.5.0
[INFO] [stderr]    Compiling crossbeam-deque v0.8.0
[INFO] [stderr]    Compiling num-complex v0.3.1
[INFO] [stderr]    Compiling approx v0.4.0
[INFO] [stderr]    Compiling num-complex v0.4.0
[INFO] [stderr]    Compiling simba v0.4.0
[INFO] [stderr]    Compiling regex v1.4.5
[INFO] [stderr]    Compiling num v0.4.0
[INFO] [stderr]    Compiling nalgebra v0.25.3
[INFO] [stderr]    Compiling aoc20 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0658]: use of unstable library feature 'bench_black_box'
[INFO] [stdout]  --> src/day19.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::hint::black_box;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: see issue #64102 <https://github.com/rust-lang/rust/issues/64102> for more information
[INFO] [stdout]   = help: add `#![feature(bench_black_box)]` to the crate attributes to enable
[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 E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `aoc20`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "635ca07d66c650812c682d36faee3f94b33ee7cc515db60b47df9e50c3057e45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "635ca07d66c650812c682d36faee3f94b33ee7cc515db60b47df9e50c3057e45", kill_on_drop: false }`
[INFO] [stdout] 635ca07d66c650812c682d36faee3f94b33ee7cc515db60b47df9e50c3057e45