[INFO] fetching crate coupon-collect 0.0.0...
[INFO] checking coupon-collect-0.0.0 against master#2e6fc425411280c658d852813de01c5157255088 for pr-128013
[INFO] extracting crate coupon-collect 0.0.0 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate coupon-collect 0.0.0 on toolchain 2e6fc425411280c658d852813de01c5157255088
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2e6fc425411280c658d852813de01c5157255088" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate coupon-collect 0.0.0
[INFO] finished tweaking crates.io crate coupon-collect 0.0.0
[INFO] tweaked toml for crates.io crate coupon-collect 0.0.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2e6fc425411280c658d852813de01c5157255088" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 11 packages to latest compatible versions
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.13.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2e6fc425411280c658d852813de01c5157255088" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+2e6fc425411280c658d852813de01c5157255088" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f6930ccad4adb0dd330c109771ee99540be2e9a0a04eac8edfd86f1e70b336af
[INFO] running `Command { std: "docker" "start" "-a" "f6930ccad4adb0dd330c109771ee99540be2e9a0a04eac8edfd86f1e70b336af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f6930ccad4adb0dd330c109771ee99540be2e9a0a04eac8edfd86f1e70b336af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f6930ccad4adb0dd330c109771ee99540be2e9a0a04eac8edfd86f1e70b336af", kill_on_drop: false }`
[INFO] [stdout] f6930ccad4adb0dd330c109771ee99540be2e9a0a04eac8edfd86f1e70b336af
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "-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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+2e6fc425411280c658d852813de01c5157255088" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 52459ce4cc4ad6047ba6ab6c5b8870c292a8501d16591c1bfda50267edce18cc
[INFO] running `Command { std: "docker" "start" "-a" "52459ce4cc4ad6047ba6ab6c5b8870c292a8501d16591c1bfda50267edce18cc", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking num-complex v0.4.6
[INFO] [stderr]     Checking num-bigint v0.4.6
[INFO] [stderr]     Checking num-iter v0.1.45
[INFO] [stderr]     Checking num-rational v0.4.2
[INFO] [stderr]     Checking num v0.4.3
[INFO] [stderr]     Checking coupon-collect v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `MarkovChain` is never constructed
[INFO] [stdout]  --> src/markov_chain/mod.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct MarkovChain {
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MarkovChain` is never constructed
[INFO] [stdout]  --> src/markov_chain/mod.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct MarkovChain {
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.18s
[INFO] running `Command { std: "docker" "inspect" "52459ce4cc4ad6047ba6ab6c5b8870c292a8501d16591c1bfda50267edce18cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52459ce4cc4ad6047ba6ab6c5b8870c292a8501d16591c1bfda50267edce18cc", kill_on_drop: false }`
[INFO] [stdout] 52459ce4cc4ad6047ba6ab6c5b8870c292a8501d16591c1bfda50267edce18cc