[INFO] fetching crate coupon-collect 0.0.0...
[INFO] testing coupon-collect-0.0.0 against beta-2023-04-20 for beta-1.70-1
[INFO] extracting crate coupon-collect 0.0.0 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate coupon-collect 0.0.0 on toolchain beta-2023-04-20
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-04-20" "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-4-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" __CARGO_TEST_CHANNEL_OVERRIDE_DO_NOT_USE_THIS="nightly" "/workspace/cargo-home/bin/cargo" "+beta-2023-04-20" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-04-20" "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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-04-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 351bf580b5092c4cf48c532401339d9e27e5ad884262b812e45f860f0f76e4f0
[INFO] running `Command { std: "docker" "start" "-a" "351bf580b5092c4cf48c532401339d9e27e5ad884262b812e45f860f0f76e4f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "351bf580b5092c4cf48c532401339d9e27e5ad884262b812e45f860f0f76e4f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "351bf580b5092c4cf48c532401339d9e27e5ad884262b812e45f860f0f76e4f0", kill_on_drop: false }`
[INFO] [stdout] 351bf580b5092c4cf48c532401339d9e27e5ad884262b812e45f860f0f76e4f0
[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=warn" "-e" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-04-20" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3ef7a6ab85524937d2cf6fc89979b9219c6070333b2027beaf32ac5fb9526ca9
[INFO] running `Command { std: "docker" "start" "-a" "3ef7a6ab85524937d2cf6fc89979b9219c6070333b2027beaf32ac5fb9526ca9", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling either v1.8.1
[INFO] [stderr]    Compiling itertools v0.10.5
[INFO] [stderr]    Compiling num-complex v0.4.3
[INFO] [stderr]    Compiling num v0.4.0
[INFO] [stderr]    Compiling 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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.81s
[INFO] running `Command { std: "docker" "inspect" "3ef7a6ab85524937d2cf6fc89979b9219c6070333b2027beaf32ac5fb9526ca9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3ef7a6ab85524937d2cf6fc89979b9219c6070333b2027beaf32ac5fb9526ca9", kill_on_drop: false }`
[INFO] [stdout] 3ef7a6ab85524937d2cf6fc89979b9219c6070333b2027beaf32ac5fb9526ca9
[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=warn" "-e" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-04-20" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0f1b3c5a7e8cf93f7ea22a4248bfd0d4041e8cff3bbc730a8331ba777d3529f0
[INFO] running `Command { std: "docker" "start" "-a" "0f1b3c5a7e8cf93f7ea22a4248bfd0d4041e8cff3bbc730a8331ba777d3529f0", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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: 1 warning emitted
[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] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `Command { std: "docker" "inspect" "0f1b3c5a7e8cf93f7ea22a4248bfd0d4041e8cff3bbc730a8331ba777d3529f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f1b3c5a7e8cf93f7ea22a4248bfd0d4041e8cff3bbc730a8331ba777d3529f0", kill_on_drop: false }`
[INFO] [stdout] 0f1b3c5a7e8cf93f7ea22a4248bfd0d4041e8cff3bbc730a8331ba777d3529f0
[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=warn" "-e" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-04-20" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 67d9d71bf2f448c62ba9ad128fa47a91d434d3b5daf33fc201d74b6ebd13c35c
[INFO] running `Command { std: "docker" "start" "-a" "67d9d71bf2f448c62ba9ad128fa47a91d434d3b5daf33fc201d74b6ebd13c35c", kill_on_drop: false }`
[INFO] [stderr] warning: struct `MarkovChain` is never constructed
[INFO] [stderr]  --> src/markov_chain/mod.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct MarkovChain {
[INFO] [stderr]   |            ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `coupon-collect` (lib) generated 1 warning
[INFO] [stderr] warning: `coupon-collect` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/coupon_collect-ec49ff8e651e54c4)
[INFO] [stderr]      Running tests/main.rs (/opt/rustwide/target/debug/deps/main-1196bd579b5a6109)
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test ready ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests coupon-collect
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "67d9d71bf2f448c62ba9ad128fa47a91d434d3b5daf33fc201d74b6ebd13c35c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67d9d71bf2f448c62ba9ad128fa47a91d434d3b5daf33fc201d74b6ebd13c35c", kill_on_drop: false }`
[INFO] [stdout] 67d9d71bf2f448c62ba9ad128fa47a91d434d3b5daf33fc201d74b6ebd13c35c
