[INFO] fetching crate circus_simulation 0.0.1...
[INFO] checking circus_simulation-0.0.1 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate circus_simulation 0.0.1 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate circus_simulation 0.0.1 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate circus_simulation 0.0.1
[INFO] finished tweaking crates.io crate circus_simulation 0.0.1
[INFO] tweaked toml for crates.io crate circus_simulation 0.0.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate circus_simulation 0.0.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pin-project-lite v0.2.7
[INFO] [stderr]   Downloaded serde v1.0.127
[INFO] [stderr]   Downloaded rand v0.8.4
[INFO] [stderr]   Downloaded wasi v0.10.2+wasi-snapshot-preview1
[INFO] [stderr]   Downloaded serde_json v1.0.66
[INFO] [stderr]   Downloaded instant v0.1.10
[INFO] [stderr]   Downloaded rand_hc v0.3.1
[INFO] [stderr]   Downloaded tracing-subscriber v0.2.19
[INFO] [stderr]   Downloaded ppv-lite86 v0.2.10
[INFO] [stderr]   Downloaded proc-macro2 v1.0.28
[INFO] [stderr]   Downloaded syn v1.0.74
[INFO] [stderr]   Downloaded redox_syscall v0.2.9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1ad40b993903b0992eeb56d20d4f457745294bc87dec9da9e81fe977c23933ea
[INFO] running `Command { std: "docker" "start" "-a" "1ad40b993903b0992eeb56d20d4f457745294bc87dec9da9e81fe977c23933ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1ad40b993903b0992eeb56d20d4f457745294bc87dec9da9e81fe977c23933ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ad40b993903b0992eeb56d20d4f457745294bc87dec9da9e81fe977c23933ea", kill_on_drop: false }`
[INFO] [stdout] 1ad40b993903b0992eeb56d20d4f457745294bc87dec9da9e81fe977c23933ea
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a7de6833fbbb3162728def1d099c441c392b21245bd73dee4cb8bb22e4c755f7
[INFO] running `Command { std: "docker" "start" "-a" "a7de6833fbbb3162728def1d099c441c392b21245bd73dee4cb8bb22e4c755f7", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking tracing-core v0.1.18
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]     Checking instant v0.1.10
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]     Checking pin-project-lite v0.2.7
[INFO] [stderr]     Checking lock_api v0.4.4
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking tracing-log v0.1.2
[INFO] [stderr]     Checking sharded-slab v0.1.1
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking matchers v0.0.1
[INFO] [stderr]     Checking tracing-serde v0.1.2
[INFO] [stderr]    Compiling tracing-attributes v0.1.15
[INFO] [stderr]     Checking tracing v0.1.26
[INFO] [stderr]     Checking tracing-subscriber v0.2.19
[INFO] [stderr]     Checking circus_simulation v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `BUGGIFIER_INSTANCE` is imported redundantly
[INFO] [stdout]    --> src/buggify.rs:127:9
[INFO] [stdout]     |
[INFO] [stdout] 127 |     use crate::buggify::BUGGIFIER_INSTANCE;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 128 |     use crate::buggify::*;
[INFO] [stdout]     |         ----------------- the item `BUGGIFIER_INSTANCE` is already imported here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Random` is imported redundantly
[INFO] [stdout]    --> src/buggify.rs:129:9
[INFO] [stdout]     |
[INFO] [stdout] 128 |     use crate::buggify::*;
[INFO] [stdout]     |         ----------------- the item `Random` is already imported here
[INFO] [stdout] 129 |     use crate::deterministic::random::Random;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.38s
[INFO] running `Command { std: "docker" "inspect" "a7de6833fbbb3162728def1d099c441c392b21245bd73dee4cb8bb22e4c755f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7de6833fbbb3162728def1d099c441c392b21245bd73dee4cb8bb22e4c755f7", kill_on_drop: false }`
[INFO] [stdout] a7de6833fbbb3162728def1d099c441c392b21245bd73dee4cb8bb22e4c755f7