[INFO] cloning repository https://github.com/max-frai/three-set-compare-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/max-frai/three-set-compare-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmax-frai%2Fthree-set-compare-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmax-frai%2Fthree-set-compare-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 231e07609d1b481a82ab4a0b116fd035b1f7a76d
[INFO] checking max-frai/three-set-compare-rs against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmax-frai%2Fthree-set-compare-rs" "/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/max-frai/three-set-compare-rs on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/max-frai/three-set-compare-rs
[INFO] finished tweaking git repo https://github.com/max-frai/three-set-compare-rs
[INFO] tweaked toml for git repo https://github.com/max-frai/three-set-compare-rs written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/max-frai/three-set-compare-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6968f1029205c8d64d66936f1f3de278451b2f73e7e599d0ffb80c8cb28c2463
[INFO] running `Command { std: "docker" "start" "-a" "6968f1029205c8d64d66936f1f3de278451b2f73e7e599d0ffb80c8cb28c2463", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6968f1029205c8d64d66936f1f3de278451b2f73e7e599d0ffb80c8cb28c2463", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6968f1029205c8d64d66936f1f3de278451b2f73e7e599d0ffb80c8cb28c2463", kill_on_drop: false }`
[INFO] [stdout] 6968f1029205c8d64d66936f1f3de278451b2f73e7e599d0ffb80c8cb28c2463
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 719a6cb217aa199d30ad600444cebc3f9dd211d89957eb24872b3365dd6b102f
[INFO] running `Command { std: "docker" "start" "-a" "719a6cb217aa199d30ad600444cebc3f9dd211d89957eb24872b3365dd6b102f", kill_on_drop: false }`
[INFO] [stderr]     Checking unidecode v0.3.0
[INFO] [stderr]     Checking assert_approx_eq v1.1.0
[INFO] [stderr]     Checking hashbrown v0.9.1
[INFO] [stderr]     Checking three-set-compare v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `cell::RefCell`
[INFO] [stdout]  --> src/lib.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     cell::RefCell,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `test`
[INFO] [stdout]    --> src/lib.rs:144:9
[INFO] [stdout]     |
[INFO] [stdout] 144 |     use test::Bencher;
[INFO] [stdout]     |         ^^^^ use of undeclared crate or module `test`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `cell::RefCell`
[INFO] [stdout]  --> src/lib.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     cell::RefCell,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: use of unstable library feature 'test': `bench` is a part of custom test frameworks which are unstable
[INFO] [stdout]    --> src/lib.rs:146:7
[INFO] [stdout]     |
[INFO] [stdout] 146 |     #[bench]
[INFO] [stdout]     |       ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[deny(soft_unstable)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #64266 <https://github.com/rust-lang/rust/issues/64266>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `three-set-compare` due to 3 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "719a6cb217aa199d30ad600444cebc3f9dd211d89957eb24872b3365dd6b102f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "719a6cb217aa199d30ad600444cebc3f9dd211d89957eb24872b3365dd6b102f", kill_on_drop: false }`
[INFO] [stdout] 719a6cb217aa199d30ad600444cebc3f9dd211d89957eb24872b3365dd6b102f