[INFO] cloning repository https://github.com/dns2utf8/lasttest
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dns2utf8/lasttest" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdns2utf8%2Flasttest", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdns2utf8%2Flasttest'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 48e56180822fa2b5926f3e4a2ca4aecba512d372
[INFO] testing dns2utf8/lasttest against beta-2020-10-09 for beta-1.48-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdns2utf8%2Flasttest" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dns2utf8/lasttest on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dns2utf8/lasttest
[INFO] finished tweaking git repo https://github.com/dns2utf8/lasttest
[INFO] tweaked toml for git repo https://github.com/dns2utf8/lasttest written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/dns2utf8/lasttest already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4e561bb5023138eaaf3fd8bb03e42b44e5a3fa0de2c55993abfcfd417ddac185
[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" "4e561bb5023138eaaf3fd8bb03e42b44e5a3fa0de2c55993abfcfd417ddac185", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4e561bb5023138eaaf3fd8bb03e42b44e5a3fa0de2c55993abfcfd417ddac185", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e561bb5023138eaaf3fd8bb03e42b44e5a3fa0de2c55993abfcfd417ddac185", kill_on_drop: false }`
[INFO] [stdout] 4e561bb5023138eaaf3fd8bb03e42b44e5a3fa0de2c55993abfcfd417ddac185
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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=warn" "-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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 08bbe5a2c46f9f339e1dab3bae21bb144abd45e7ebbf7a9de5e37a7651a214f0
[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" "08bbe5a2c46f9f339e1dab3bae21bb144abd45e7ebbf7a9de5e37a7651a214f0", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.8
[INFO] [stderr]    Compiling serde v1.0.102
[INFO] [stderr]    Compiling strsim v0.9.2
[INFO] [stderr]    Compiling crossbeam v0.3.2
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling num_cpus v1.11.0
[INFO] [stderr]    Compiling threadpool v1.7.1
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling serde_derive v1.0.102
[INFO] [stderr]    Compiling docopt v1.1.0
[INFO] [stderr]    Compiling lasttest v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable `seed` is assigned to, but never used
[INFO] [stdout]    --> src/local.rs:314:11
[INFO] [stdout]     |
[INFO] [stdout] 314 |       let seed;
[INFO] [stdout]     |           ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]     = note: consider using `_seed` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `seed` is never read
[INFO] [stdout]    --> src/local.rs:319:13
[INFO] [stdout]     |
[INFO] [stdout] 319 |             seed = seed_in;
[INFO] [stdout]     |             ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/local.rs:295:8
[INFO] [stdout]     |
[INFO] [stdout] 295 |   let (mut worker, stealer) = chase_lev::deque();
[INFO] [stdout]     |        ----^^^^^^
[INFO] [stdout]     |        |
[INFO] [stdout]     |        help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stdout]    --> src/local.rs:176:3
[INFO] [stdout]     |
[INFO] [stdout] 176 |   tx.send( (0, 0) ).is_ok();
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stdout]    --> src/local.rs:189:7
[INFO] [stdout]     |
[INFO] [stdout] 189 |       tx_chain.send( (b.0 + r.0, b.1 + r.1) ).is_ok();
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stdout]    --> src/local.rs:215:5
[INFO] [stdout]     |
[INFO] [stdout] 215 |     t.send(inside).is_ok();
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stdout]    --> src/local.rs:229:11
[INFO] [stdout]     |
[INFO] [stdout] 229 |           outside.send(Some(1)).is_ok();
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stdout]    --> src/local.rs:231:11
[INFO] [stdout]     |
[INFO] [stdout] 231 |           inside.send(Some(1)).is_ok();
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stdout]    --> src/local.rs:235:7
[INFO] [stdout]     |
[INFO] [stdout] 235 |       outside.send(None).is_ok();
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stdout]    --> src/local.rs:236:7
[INFO] [stdout]     |
[INFO] [stdout] 236 |       inside.send(None).is_ok();
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stdout]    --> src/local.rs:279:9
[INFO] [stdout]     |
[INFO] [stdout] 279 |         tx.send(format!("Hash of {} is 0", b)).is_ok();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stdout]    --> src/local.rs:284:13
[INFO] [stdout]     |
[INFO] [stdout] 284 |             tx.send(format!("{} times {} is 0", b, f)).is_ok();
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stdout]    --> src/local.rs:289:7
[INFO] [stdout]     |
[INFO] [stdout] 289 |       tx.send(format!("{}", h)).is_ok();
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 35.10s
[INFO] running `Command { std: "docker" "inspect" "08bbe5a2c46f9f339e1dab3bae21bb144abd45e7ebbf7a9de5e37a7651a214f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08bbe5a2c46f9f339e1dab3bae21bb144abd45e7ebbf7a9de5e37a7651a214f0", kill_on_drop: false }`
[INFO] [stdout] 08bbe5a2c46f9f339e1dab3bae21bb144abd45e7ebbf7a9de5e37a7651a214f0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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=warn" "-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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cee8dfc694eb3c2a73632720ab85df4940043fa59b2c044a739906d680b90b06
[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" "cee8dfc694eb3c2a73632720ab85df4940043fa59b2c044a739906d680b90b06", kill_on_drop: false }`
[INFO] [stderr]    Compiling lasttest v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable `seed` is assigned to, but never used
[INFO] [stdout]    --> src/local.rs:314:11
[INFO] [stdout]     |
[INFO] [stdout] 314 |       let seed;
[INFO] [stdout]     |           ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]     = note: consider using `_seed` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `seed` is never read
[INFO] [stdout]    --> src/local.rs:319:13
[INFO] [stdout]     |
[INFO] [stdout] 319 |             seed = seed_in;
[INFO] [stdout]     |             ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/local.rs:295:8
[INFO] [stdout]     |
[INFO] [stdout] 295 |   let (mut worker, stealer) = chase_lev::deque();
[INFO] [stdout]     |        ----^^^^^^
[INFO] [stdout]     |        |
[INFO] [stdout]     |        help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stdout]    --> src/local.rs:176:3
[INFO] [stdout]     |
[INFO] [stdout] 176 |   tx.send( (0, 0) ).is_ok();
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stdout]    --> src/local.rs:189:7
[INFO] [stdout]     |
[INFO] [stdout] 189 |       tx_chain.send( (b.0 + r.0, b.1 + r.1) ).is_ok();
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stdout]    --> src/local.rs:215:5
[INFO] [stdout]     |
[INFO] [stdout] 215 |     t.send(inside).is_ok();
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stdout]    --> src/local.rs:229:11
[INFO] [stdout]     |
[INFO] [stdout] 229 |           outside.send(Some(1)).is_ok();
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stdout]    --> src/local.rs:231:11
[INFO] [stdout]     |
[INFO] [stdout] 231 |           inside.send(Some(1)).is_ok();
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stdout]    --> src/local.rs:235:7
[INFO] [stdout]     |
[INFO] [stdout] 235 |       outside.send(None).is_ok();
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stdout]    --> src/local.rs:236:7
[INFO] [stdout]     |
[INFO] [stdout] 236 |       inside.send(None).is_ok();
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stdout]    --> src/local.rs:279:9
[INFO] [stdout]     |
[INFO] [stdout] 279 |         tx.send(format!("Hash of {} is 0", b)).is_ok();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stdout]    --> src/local.rs:284:13
[INFO] [stdout]     |
[INFO] [stdout] 284 |             tx.send(format!("{} times {} is 0", b, f)).is_ok();
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stdout]    --> src/local.rs:289:7
[INFO] [stdout]     |
[INFO] [stdout] 289 |       tx.send(format!("{}", h)).is_ok();
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.15s
[INFO] running `Command { std: "docker" "inspect" "cee8dfc694eb3c2a73632720ab85df4940043fa59b2c044a739906d680b90b06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cee8dfc694eb3c2a73632720ab85df4940043fa59b2c044a739906d680b90b06", kill_on_drop: false }`
[INFO] [stdout] cee8dfc694eb3c2a73632720ab85df4940043fa59b2c044a739906d680b90b06
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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=warn" "-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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 65c61f4506c3e79b0be192191f885a99dc809a11d0803961cbed84878c545fb8
[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" "65c61f4506c3e79b0be192191f885a99dc809a11d0803961cbed84878c545fb8", kill_on_drop: false }`
[INFO] [stderr] warning: variable `seed` is assigned to, but never used
[INFO] [stderr]    --> src/local.rs:314:11
[INFO] [stderr]     |
[INFO] [stderr] 314 |       let seed;
[INFO] [stderr]     |           ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr]     = note: consider using `_seed` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `seed` is never read
[INFO] [stderr]    --> src/local.rs:319:13
[INFO] [stderr]     |
[INFO] [stderr] 319 |             seed = seed_in;
[INFO] [stderr]     |             ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/local.rs:295:8
[INFO] [stderr]     |
[INFO] [stderr] 295 |   let (mut worker, stealer) = chase_lev::deque();
[INFO] [stderr]     |        ----^^^^^^
[INFO] [stderr]     |        |
[INFO] [stderr]     |        help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]    --> src/local.rs:176:3
[INFO] [stderr]     |
[INFO] [stderr] 176 |   tx.send( (0, 0) ).is_ok();
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]    --> src/local.rs:189:7
[INFO] [stderr]     |
[INFO] [stderr] 189 |       tx_chain.send( (b.0 + r.0, b.1 + r.1) ).is_ok();
[INFO] [stderr]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]    --> src/local.rs:215:5
[INFO] [stderr]     |
[INFO] [stderr] 215 |     t.send(inside).is_ok();
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]    --> src/local.rs:229:11
[INFO] [stderr]     |
[INFO] [stderr] 229 |           outside.send(Some(1)).is_ok();
[INFO] [stderr]     |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]    --> src/local.rs:231:11
[INFO] [stderr]     |
[INFO] [stderr] 231 |           inside.send(Some(1)).is_ok();
[INFO] [stderr]     |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]    --> src/local.rs:235:7
[INFO] [stderr]     |
[INFO] [stderr] 235 |       outside.send(None).is_ok();
[INFO] [stderr]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]    --> src/local.rs:236:7
[INFO] [stderr]     |
[INFO] [stderr] 236 |       inside.send(None).is_ok();
[INFO] [stderr]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]    --> src/local.rs:279:9
[INFO] [stderr]     |
[INFO] [stderr] 279 |         tx.send(format!("Hash of {} is 0", b)).is_ok();
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]    --> src/local.rs:284:13
[INFO] [stderr]     |
[INFO] [stderr] 284 |             tx.send(format!("{} times {} is 0", b, f)).is_ok();
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]    --> src/local.rs:289:7
[INFO] [stderr]     |
[INFO] [stderr] 289 |       tx.send(format!("{}", h)).is_ok();
[INFO] [stderr]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stderr] 
[INFO] [stderr] warning: 13 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/lasttest-bae4ec0ad6aeeccf
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "65c61f4506c3e79b0be192191f885a99dc809a11d0803961cbed84878c545fb8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "65c61f4506c3e79b0be192191f885a99dc809a11d0803961cbed84878c545fb8", kill_on_drop: false }`
[INFO] [stdout] 65c61f4506c3e79b0be192191f885a99dc809a11d0803961cbed84878c545fb8
