[INFO] updating cached repository https://github.com/mcbridejc/rust-2064
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b42261b3822e52f4bfdcb8e0307eedf3ba47fb19
[INFO] checking mcbridejc/rust-2064 against master#e1beee4992ad4b235fc700bf7af1ee86f894ea53 for pr-74130
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmcbridejc%2Frust-2064" "/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/mcbridejc/rust-2064 on toolchain e1beee4992ad4b235fc700bf7af1ee86f894ea53
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+e1beee4992ad4b235fc700bf7af1ee86f894ea53" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mcbridejc/rust-2064
[INFO] finished tweaking git repo https://github.com/mcbridejc/rust-2064
[INFO] tweaked toml for git repo https://github.com/mcbridejc/rust-2064 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/mcbridejc/rust-2064 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+e1beee4992ad4b235fc700bf7af1ee86f894ea53" "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] 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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+e1beee4992ad4b235fc700bf7af1ee86f894ea53" "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] 7caad47a4e8e86c42b7336cbd19744cc1f0ff21768fb2419969392e61290f837
[INFO] running `Command { std: "docker" "start" "-a" "7caad47a4e8e86c42b7336cbd19744cc1f0ff21768fb2419969392e61290f837", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7caad47a4e8e86c42b7336cbd19744cc1f0ff21768fb2419969392e61290f837", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7caad47a4e8e86c42b7336cbd19744cc1f0ff21768fb2419969392e61290f837", kill_on_drop: false }`
[INFO] [stdout] 7caad47a4e8e86c42b7336cbd19744cc1f0ff21768fb2419969392e61290f837
[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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+e1beee4992ad4b235fc700bf7af1ee86f894ea53" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d27a0c8f69feaf95f91b309240d5ce463472331e355cbbccb2511a215983669a
[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" "d27a0c8f69feaf95f91b309240d5ce463472331e355cbbccb2511a215983669a", kill_on_drop: false }`
[INFO] [stderr]     Checking cfg-if v0.1.9
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling ryu v1.0.0
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling cc v1.0.45
[INFO] [stderr]     Checking itoa v0.4.4
[INFO] [stderr]    Compiling pkg-config v0.3.16
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]     Checking unicode-width v0.1.6
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking dtoa v0.4.4
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking itertools v0.8.0
[INFO] [stderr]     Checking arrayvec v0.4.11
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]     Checking c2-chacha v0.2.2
[INFO] [stderr]     Checking getrandom v0.1.12
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking thread-id v3.3.0
[INFO] [stderr]    Compiling memoffset v0.5.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.4
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking crossbeam-queue v0.1.2
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking rand_xoshiro v0.3.1
[INFO] [stderr]     Checking rand_os v0.2.2
[INFO] [stderr]     Checking rand_pcg v0.2.0
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking crossbeam-epoch v0.7.2
[INFO] [stderr]    Compiling ncurses v5.99.0
[INFO] [stderr]     Checking regex-automata v0.1.8
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking criterion-plot v0.4.0
[INFO] [stderr]     Checking crossbeam-deque v0.7.1
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]     Checking rayon-core v1.6.0
[INFO] [stderr]     Checking pancurses v0.16.1
[INFO] [stderr]     Checking easycurses v0.12.2
[INFO] [stderr]     Checking rayon v1.2.0
[INFO] [stderr]    Compiling serde_derive v1.0.101
[INFO] [stderr]     Checking serde v1.0.101
[INFO] [stderr]     Checking serde_json v1.0.40
[INFO] [stderr]     Checking bstr v0.2.8
[INFO] [stderr]     Checking serde_yaml v0.8.9
[INFO] [stderr]     Checking csv v1.1.1
[INFO] [stderr]     Checking tinytemplate v1.0.2
[INFO] [stderr]     Checking flame v0.2.2
[INFO] [stderr]     Checking criterion v0.3.0
[INFO] [stderr]     Checking twentysixtyfour v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]   --> benches/benchmark.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::fs::File;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 09s
[INFO] running `Command { std: "docker" "inspect" "d27a0c8f69feaf95f91b309240d5ce463472331e355cbbccb2511a215983669a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d27a0c8f69feaf95f91b309240d5ce463472331e355cbbccb2511a215983669a", kill_on_drop: false }`
[INFO] [stdout] d27a0c8f69feaf95f91b309240d5ce463472331e355cbbccb2511a215983669a