[INFO] cloning repository https://github.com/DvorakDwarf/RaceNG
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/DvorakDwarf/RaceNG" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDvorakDwarf%2FRaceNG", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDvorakDwarf%2FRaceNG'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b082477650188018504797ff3a92021d60716396
[INFO] building DvorakDwarf/RaceNG against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDvorakDwarf%2FRaceNG" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/DvorakDwarf/RaceNG on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/DvorakDwarf/RaceNG
[INFO] finished tweaking git repo https://github.com/DvorakDwarf/RaceNG
[INFO] tweaked toml for git repo https://github.com/DvorakDwarf/RaceNG written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/DvorakDwarf/RaceNG 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e5ae8c17b500cc42eb7ad99f7ff6458059b23b9c3143162f369575391085e458
[INFO] running `Command { std: "docker" "start" "-a" "e5ae8c17b500cc42eb7ad99f7ff6458059b23b9c3143162f369575391085e458", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e5ae8c17b500cc42eb7ad99f7ff6458059b23b9c3143162f369575391085e458", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e5ae8c17b500cc42eb7ad99f7ff6458059b23b9c3143162f369575391085e458", kill_on_drop: false }`
[INFO] [stdout] e5ae8c17b500cc42eb7ad99f7ff6458059b23b9c3143162f369575391085e458
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 11a4b937d588b77b8a8df87358803f5ee52d407ab551963fd111c9d8460ca5cc
[INFO] running `Command { std: "docker" "start" "-a" "11a4b937d588b77b8a8df87358803f5ee52d407ab551963fd111c9d8460ca5cc", kill_on_drop: false }`
[INFO] [stderr]    Compiling RaceNG v1.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `slowdown`
[INFO] [stdout]   --> src/lib.rs:17:17
[INFO] [stdout]    |
[INFO] [stdout] 17 |             let slowdown = generate_primes(2000);
[INFO] [stdout]    |                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_slowdown`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slowdown`
[INFO] [stdout]   --> src/lib.rs:23:17
[INFO] [stdout]    |
[INFO] [stdout] 23 |             let slowdown = generate_primes(2000);
[INFO] [stdout]    |                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_slowdown`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `RaceNG` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = help: convert the identifier to snake case: `race_ng`
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:16:13
[INFO] [stdout]    |
[INFO] [stdout] 16 |             tx1.send(x);
[INFO] [stdout]    |             ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 16 |             let _ = tx1.send(x);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:22:13
[INFO] [stdout]    |
[INFO] [stdout] 22 |             tx2.send(y);
[INFO] [stdout]    |             ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 22 |             let _ = tx2.send(y);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `Command { std: "docker" "inspect" "11a4b937d588b77b8a8df87358803f5ee52d407ab551963fd111c9d8460ca5cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11a4b937d588b77b8a8df87358803f5ee52d407ab551963fd111c9d8460ca5cc", kill_on_drop: false }`
[INFO] [stdout] 11a4b937d588b77b8a8df87358803f5ee52d407ab551963fd111c9d8460ca5cc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 617b1e56ba009e614cb164476e0faba69680afab7455f2cca7e2bb27e7b493fa
[INFO] running `Command { std: "docker" "start" "-a" "617b1e56ba009e614cb164476e0faba69680afab7455f2cca7e2bb27e7b493fa", kill_on_drop: false }`
[INFO] [stderr]    Compiling RaceNG v1.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `slowdown`
[INFO] [stdout]   --> src/lib.rs:17:17
[INFO] [stdout]    |
[INFO] [stdout] 17 |             let slowdown = generate_primes(2000);
[INFO] [stdout]    |                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_slowdown`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slowdown`
[INFO] [stdout]   --> src/lib.rs:23:17
[INFO] [stdout]    |
[INFO] [stdout] 23 |             let slowdown = generate_primes(2000);
[INFO] [stdout]    |                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_slowdown`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `RaceNG` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = help: convert the identifier to snake case: `race_ng`
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:16:13
[INFO] [stdout]    |
[INFO] [stdout] 16 |             tx1.send(x);
[INFO] [stdout]    |             ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 16 |             let _ = tx1.send(x);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:22:13
[INFO] [stdout]    |
[INFO] [stdout] 22 |             tx2.send(y);
[INFO] [stdout]    |             ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 22 |             let _ = tx2.send(y);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slowdown`
[INFO] [stdout]   --> src/lib.rs:17:17
[INFO] [stdout]    |
[INFO] [stdout] 17 |             let slowdown = generate_primes(2000);
[INFO] [stdout]    |                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_slowdown`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slowdown`
[INFO] [stdout]   --> src/lib.rs:23:17
[INFO] [stdout]    |
[INFO] [stdout] 23 |             let slowdown = generate_primes(2000);
[INFO] [stdout]    |                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_slowdown`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:16:13
[INFO] [stdout]    |
[INFO] [stdout] 16 |             tx1.send(x);
[INFO] [stdout]    |             ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 16 |             let _ = tx1.send(x);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:22:13
[INFO] [stdout]    |
[INFO] [stdout] 22 |             tx2.send(y);
[INFO] [stdout]    |             ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 22 |             let _ = tx2.send(y);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.22s
[INFO] running `Command { std: "docker" "inspect" "617b1e56ba009e614cb164476e0faba69680afab7455f2cca7e2bb27e7b493fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "617b1e56ba009e614cb164476e0faba69680afab7455f2cca7e2bb27e7b493fa", kill_on_drop: false }`
[INFO] [stdout] 617b1e56ba009e614cb164476e0faba69680afab7455f2cca7e2bb27e7b493fa