[INFO] fetching crate prime-factor 0.4.3...
[INFO] checking prime-factor-0.4.3 against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] extracting crate prime-factor 0.4.3 into /workspace/builds/worker-62/source
[INFO] validating manifest of crates.io crate prime-factor 0.4.3 on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate prime-factor 0.4.3
[INFO] finished tweaking crates.io crate prime-factor 0.4.3
[INFO] tweaked toml for crates.io crate prime-factor 0.4.3 written to /workspace/builds/worker-62/source/Cargo.toml
[INFO] crate crates.io crate prime-factor 0.4.3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "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-62/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-62/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 41932cf023c74b965d8d475c020806ceaa84891b9712ce34252af3aba0f89002
[INFO] running `Command { std: "docker" "start" "-a" "41932cf023c74b965d8d475c020806ceaa84891b9712ce34252af3aba0f89002", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "41932cf023c74b965d8d475c020806ceaa84891b9712ce34252af3aba0f89002", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41932cf023c74b965d8d475c020806ceaa84891b9712ce34252af3aba0f89002", kill_on_drop: false }`
[INFO] [stdout] 41932cf023c74b965d8d475c020806ceaa84891b9712ce34252af3aba0f89002
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-62/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-62/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] beec514dcee0d148f8ed1458b3b8aecc705d4755108cc4667e281b757a922e0d
[INFO] running `Command { std: "docker" "start" "-a" "beec514dcee0d148f8ed1458b3b8aecc705d4755108cc4667e281b757a922e0d", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libc v0.2.104
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.30
[INFO] [stderr]    Compiling unicode-xid v0.2.2
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[INFO] [stderr]    Compiling genawaiter-proc-macro v0.99.1
[INFO] [stderr]     Checking genawaiter v0.99.1
[INFO] [stderr]     Checking prime-factor v0.4.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking criterion v0.3.5
[INFO] [stdout] warning: unused return value of `from` that must be used
[INFO] [stdout]   --> benches/benchmark.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     PrimeFactors::from(n);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `from` that must be used
[INFO] [stdout]   --> benches/benchmark.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     PrimeFactors::from(rnd.gen_range(interval) as u128);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 22.57s
[INFO] running `Command { std: "docker" "inspect" "beec514dcee0d148f8ed1458b3b8aecc705d4755108cc4667e281b757a922e0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "beec514dcee0d148f8ed1458b3b8aecc705d4755108cc4667e281b757a922e0d", kill_on_drop: false }`
[INFO] [stdout] beec514dcee0d148f8ed1458b3b8aecc705d4755108cc4667e281b757a922e0d