[INFO] fetching crate mcaptcha_pow_sha256 0.5.0...
[INFO] testing mcaptcha_pow_sha256-0.5.0 against master#562dee4820c458d823175268e41601d4c060588a for pr-154210-1
[INFO] extracting crate mcaptcha_pow_sha256 0.5.0 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate mcaptcha_pow_sha256 0.5.0
[INFO] finished tweaking crates.io crate mcaptcha_pow_sha256 0.5.0
[INFO] tweaked toml for crates.io crate mcaptcha_pow_sha256 0.5.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate mcaptcha_pow_sha256 0.5.0 on toolchain 562dee4820c458d823175268e41601d4c060588a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate mcaptcha_pow_sha256 0.5.0 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" "+562dee4820c458d823175268e41601d4c060588a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded num v0.4.1
[INFO] [stderr]   Downloaded num-iter v0.1.43
[INFO] [stderr]   Downloaded derive_builder v0.12.0
[INFO] [stderr]   Downloaded derive_builder_macro v0.12.0
[INFO] [stderr]   Downloaded darling_macro v0.14.4
[INFO] [stderr]   Downloaded num-complex v0.4.4
[INFO] [stderr]   Downloaded darling v0.14.4
[INFO] [stderr]   Downloaded derive_builder_core v0.12.0
[INFO] [stderr]   Downloaded darling_core v0.14.4
[INFO] [stderr]   Downloaded num-bigint v0.4.4
[INFO] [stderr]   Downloaded serde v1.0.189
[INFO] [stderr]   Downloaded num-traits v0.2.17
[INFO] [stderr]   Downloaded serde_derive v1.0.189
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f84fb159f4f5eb0de6eecf7ead52a6ebb596076f96b3d2b66e06a724ab702702
[INFO] running `Command { std: "docker" "start" "-a" "f84fb159f4f5eb0de6eecf7ead52a6ebb596076f96b3d2b66e06a724ab702702", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f84fb159f4f5eb0de6eecf7ead52a6ebb596076f96b3d2b66e06a724ab702702", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f84fb159f4f5eb0de6eecf7ead52a6ebb596076f96b3d2b66e06a724ab702702", kill_on_drop: false }`
[INFO] [stdout] f84fb159f4f5eb0de6eecf7ead52a6ebb596076f96b3d2b66e06a724ab702702
[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" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c28f0ffd4350b84c1c1dab71c12978398f221c21ae1bd70ff2d7b380d7643f1b
[INFO] running `Command { std: "docker" "start" "-a" "c28f0ffd4350b84c1c1dab71c12978398f221c21ae1bd70ff2d7b380d7643f1b", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.69
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling serde v1.0.189
[INFO] [stderr]    Compiling typenum v1.17.0
[INFO] [stderr]    Compiling cpufeatures v0.2.9
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling num-bigint v0.4.4
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling syn v2.0.38
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling crypto-common v0.1.6
[INFO] [stderr]    Compiling block-buffer v0.10.4
[INFO] [stderr]    Compiling serde_derive v1.0.189
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]    Compiling sha2 v0.10.8
[INFO] [stderr]    Compiling darling_core v0.14.4
[INFO] [stderr]    Compiling darling_macro v0.14.4
[INFO] [stderr]    Compiling darling v0.14.4
[INFO] [stderr]    Compiling derive_builder_core v0.12.0
[INFO] [stderr]    Compiling derive_builder_macro v0.12.0
[INFO] [stderr]    Compiling derive_builder v0.12.0
[INFO] [stderr]    Compiling num-complex v0.4.4
[INFO] [stderr]    Compiling bincode v1.3.3
[INFO] [stderr]    Compiling num v0.4.1
[INFO] [stderr]    Compiling mcaptcha_pow_sha256 v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 18.36s
[INFO] running `Command { std: "docker" "inspect" "c28f0ffd4350b84c1c1dab71c12978398f221c21ae1bd70ff2d7b380d7643f1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c28f0ffd4350b84c1c1dab71c12978398f221c21ae1bd70ff2d7b380d7643f1b", kill_on_drop: false }`
[INFO] [stdout] c28f0ffd4350b84c1c1dab71c12978398f221c21ae1bd70ff2d7b380d7643f1b
[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" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4dbd1512c6e27e568c9a32d023ca3c8a4250a1baf5a03e34530d35e72fa05903
[INFO] running `Command { std: "docker" "start" "-a" "4dbd1512c6e27e568c9a32d023ca3c8a4250a1baf5a03e34530d35e72fa05903", kill_on_drop: false }`
[INFO] [stderr]    Compiling mcaptcha_pow_sha256 v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `PoW`
[INFO] [stdout]   --> examples/simple.rs:10:42
[INFO] [stdout]    |
[INFO] [stdout] 10 | use mcaptcha_pow_sha256::{ConfigBuilder, PoW};
[INFO] [stdout]    |                                          ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `Command { std: "docker" "inspect" "4dbd1512c6e27e568c9a32d023ca3c8a4250a1baf5a03e34530d35e72fa05903", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4dbd1512c6e27e568c9a32d023ca3c8a4250a1baf5a03e34530d35e72fa05903", kill_on_drop: false }`
[INFO] [stdout] 4dbd1512c6e27e568c9a32d023ca3c8a4250a1baf5a03e34530d35e72fa05903
[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" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c66b9ede0a9c4cf4f92d72b9769ef0219bcc4c9351978a85d2a8adc044087f4e
[INFO] running `Command { std: "docker" "start" "-a" "c66b9ede0a9c4cf4f92d72b9769ef0219bcc4c9351978a85d2a8adc044087f4e", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `PoW`
[INFO] [stderr]   --> examples/simple.rs:10:42
[INFO] [stderr]    |
[INFO] [stderr] 10 | use mcaptcha_pow_sha256::{ConfigBuilder, PoW};
[INFO] [stderr]    |                                          ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `mcaptcha_pow_sha256` (example "simple") generated 1 warning (run `cargo fix --example "simple" -p mcaptcha_pow_sha256` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/mcaptcha_pow_sha256-e7f3f6d29bd1b44b)
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test test::base_functionality ... ok
[INFO] [stdout] test test::serialization_test ... ok
[INFO] [stdout] test test::is_not_valid_proof ... ok
[INFO] [stdout] test test::double_pow ... ok
[INFO] [stdout] test test::computation_time_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 7.24s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests mcaptcha_pow_sha256
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 9) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.45s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c66b9ede0a9c4cf4f92d72b9769ef0219bcc4c9351978a85d2a8adc044087f4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c66b9ede0a9c4cf4f92d72b9769ef0219bcc4c9351978a85d2a8adc044087f4e", kill_on_drop: false }`
[INFO] [stdout] c66b9ede0a9c4cf4f92d72b9769ef0219bcc4c9351978a85d2a8adc044087f4e