[INFO] cloning repository https://github.com/frontierpsycho/set.rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/frontierpsycho/set.rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffrontierpsycho%2Fset.rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffrontierpsycho%2Fset.rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6cd10a080b8602ae00534d699deac0815996538d
[INFO] building frontierpsycho/set.rs against try#58b1b3c5342a414c161338871f8004258ccef2a7 for pr-149937
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffrontierpsycho%2Fset.rs" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/frontierpsycho/set.rs
[INFO] finished tweaking git repo https://github.com/frontierpsycho/set.rs
[INFO] tweaked toml for git repo https://github.com/frontierpsycho/set.rs written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/frontierpsycho/set.rs on toolchain 58b1b3c5342a414c161338871f8004258ccef2a7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+58b1b3c5342a414c161338871f8004258ccef2a7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/frontierpsycho/set.rs 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" "+58b1b3c5342a414c161338871f8004258ccef2a7" "fetch" "--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 libc v0.2.86
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+58b1b3c5342a414c161338871f8004258ccef2a7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f17a9beaa82e2f5c49b964183a20e3a58510e72532ff95ee5db247c520ac2adc
[INFO] running `Command { std: "docker" "start" "-a" "f17a9beaa82e2f5c49b964183a20e3a58510e72532ff95ee5db247c520ac2adc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f17a9beaa82e2f5c49b964183a20e3a58510e72532ff95ee5db247c520ac2adc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f17a9beaa82e2f5c49b964183a20e3a58510e72532ff95ee5db247c520ac2adc", kill_on_drop: false }`
[INFO] [stdout] f17a9beaa82e2f5c49b964183a20e3a58510e72532ff95ee5db247c520ac2adc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+58b1b3c5342a414c161338871f8004258ccef2a7" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 51d455234b0f1056bf6e47877d75c3fc271e5c8e74429d3326c64dc83cc39540
[INFO] running `Command { std: "docker" "start" "-a" "51d455234b0f1056bf6e47877d75c3fc271e5c8e74429d3326c64dc83cc39540", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.86
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling rand_core v0.6.2
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stderr]    Compiling rand v0.8.3
[INFO] [stderr]    Compiling set v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&card::Card` instead of cloning the inner type
[INFO] [stdout]    --> src/solving.rs:121:63
[INFO] [stdout]     |
[INFO] [stdout] 121 |                 let found_set = Set::new(card1.clone(), *card2.clone(), extrapolated_card.clone());
[INFO] [stdout]     |                                                               ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.48s
[INFO] running `Command { std: "docker" "inspect" "51d455234b0f1056bf6e47877d75c3fc271e5c8e74429d3326c64dc83cc39540", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51d455234b0f1056bf6e47877d75c3fc271e5c8e74429d3326c64dc83cc39540", kill_on_drop: false }`
[INFO] [stdout] 51d455234b0f1056bf6e47877d75c3fc271e5c8e74429d3326c64dc83cc39540
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+58b1b3c5342a414c161338871f8004258ccef2a7" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6e77ecf4f6dea7ae0bd46b1c7f70a6c560e2bba57d93f977bae46e88b85a2036
[INFO] running `Command { std: "docker" "start" "-a" "6e77ecf4f6dea7ae0bd46b1c7f70a6c560e2bba57d93f977bae46e88b85a2036", kill_on_drop: false }`
[INFO] [stderr]    Compiling set v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&card::Card` instead of cloning the inner type
[INFO] [stdout]    --> src/solving.rs:121:63
[INFO] [stdout]     |
[INFO] [stdout] 121 |                 let found_set = Set::new(card1.clone(), *card2.clone(), extrapolated_card.clone());
[INFO] [stdout]     |                                                               ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&card::Card` instead of cloning the inner type
[INFO] [stdout]    --> src/solving.rs:121:63
[INFO] [stdout]     |
[INFO] [stdout] 121 |                 let found_set = Set::new(card1.clone(), *card2.clone(), extrapolated_card.clone());
[INFO] [stdout]     |                                                               ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.25s
[INFO] running `Command { std: "docker" "inspect" "6e77ecf4f6dea7ae0bd46b1c7f70a6c560e2bba57d93f977bae46e88b85a2036", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e77ecf4f6dea7ae0bd46b1c7f70a6c560e2bba57d93f977bae46e88b85a2036", kill_on_drop: false }`
[INFO] [stdout] 6e77ecf4f6dea7ae0bd46b1c7f70a6c560e2bba57d93f977bae46e88b85a2036