[INFO] fetching crate cow-dice-rs 0.1.0...
[INFO] checking cow-dice-rs-0.1.0 against try#a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d for pr-145342-1
[INFO] extracting crate cow-dice-rs 0.1.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate cow-dice-rs 0.1.0
[INFO] finished tweaking crates.io crate cow-dice-rs 0.1.0
[INFO] tweaked toml for crates.io crate cow-dice-rs 0.1.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate cow-dice-rs 0.1.0 on toolchain a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 14 packages to latest compatible versions
[INFO] [stderr]       Adding rand v0.8.5 (available: v0.9.2)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 79103588a5ade6f545446637fa1483c7e720962712d41ce5c0e5b0ed47bb187a
[INFO] running `Command { std: "docker" "start" "-a" "79103588a5ade6f545446637fa1483c7e720962712d41ce5c0e5b0ed47bb187a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "79103588a5ade6f545446637fa1483c7e720962712d41ce5c0e5b0ed47bb187a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79103588a5ade6f545446637fa1483c7e720962712d41ce5c0e5b0ed47bb187a", kill_on_drop: false }`
[INFO] [stdout] 79103588a5ade6f545446637fa1483c7e720962712d41ce5c0e5b0ed47bb187a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 90d639bb354a492cbc9f8747a3c3f55f745bf05a516e314203c4e092ad4a9fb1
[INFO] running `Command { std: "docker" "start" "-a" "90d639bb354a492cbc9f8747a3c3f55f745bf05a516e314203c4e092ad4a9fb1", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.175
[INFO] [stderr]    Compiling zerocopy v0.8.26
[INFO] [stderr]     Checking cfg-if v1.0.3
[INFO] [stderr]     Checking getrandom v0.2.16
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking ppv-lite86 v0.2.21
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking cow-dice-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/dice.rs:80:13
[INFO] [stdout]    |
[INFO] [stdout] 80 |         for i in [0..num_samples] {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `die`
[INFO] [stdout]   --> src/dice.rs:81:17
[INFO] [stdout]    |
[INFO] [stdout] 81 |             let die = D6::roll();
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_die`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/dice.rs:99:13
[INFO] [stdout]    |
[INFO] [stdout] 99 |         for i in [0..num_samples] {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pair`
[INFO] [stdout]    --> src/dice.rs:100:17
[INFO] [stdout]     |
[INFO] [stdout] 100 |             let pair = TwoD6::roll();
[INFO] [stdout]     |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_pair`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.62s
[INFO] running `Command { std: "docker" "inspect" "90d639bb354a492cbc9f8747a3c3f55f745bf05a516e314203c4e092ad4a9fb1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90d639bb354a492cbc9f8747a3c3f55f745bf05a516e314203c4e092ad4a9fb1", kill_on_drop: false }`
[INFO] [stdout] 90d639bb354a492cbc9f8747a3c3f55f745bf05a516e314203c4e092ad4a9fb1