[INFO] cloning repository https://github.com/ElectricCoffee/word_generator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ElectricCoffee/word_generator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FElectricCoffee%2Fword_generator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FElectricCoffee%2Fword_generator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8066370286e040f0e85b5648677089f10e82d6bc
[INFO] testing ElectricCoffee/word_generator against beta-2021-09-08 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FElectricCoffee%2Fword_generator" "/workspace/builds/worker-32/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-32/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ElectricCoffee/word_generator on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ElectricCoffee/word_generator
[INFO] finished tweaking git repo https://github.com/ElectricCoffee/word_generator
[INFO] tweaked toml for git repo https://github.com/ElectricCoffee/word_generator written to /workspace/builds/worker-32/source/Cargo.toml
[INFO] crate git repo https://github.com/ElectricCoffee/word_generator already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] de07ae72c577b50ff844da50937068f7c3ac4876e032a6f790f870c118ca6750
[INFO] running `Command { std: "docker" "start" "-a" "de07ae72c577b50ff844da50937068f7c3ac4876e032a6f790f870c118ca6750", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "de07ae72c577b50ff844da50937068f7c3ac4876e032a6f790f870c118ca6750", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de07ae72c577b50ff844da50937068f7c3ac4876e032a6f790f870c118ca6750", kill_on_drop: false }`
[INFO] [stdout] de07ae72c577b50ff844da50937068f7c3ac4876e032a6f790f870c118ca6750
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f083c1d49cfcd6c0480a33189ad5cb31f40c2f6fae2792fd8a94ba50f33f572c
[INFO] running `Command { std: "docker" "start" "-a" "f083c1d49cfcd6c0480a33189ad5cb31f40c2f6fae2792fd8a94ba50f33f572c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rand_core v0.2.1
[INFO] [stderr]    Compiling libc v0.2.42
[INFO] [stderr]    Compiling rand v0.5.1
[INFO] [stderr]    Compiling word_generator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:10:13
[INFO] [stdout]    |
[INFO] [stdout] 10 |         let mut v = vec![$($e),*];
[INFO] [stdout]    |             ----^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 72 |     let v = seq![opt!(C), C, V, opt!(C), C, V, opt!(C)]; // generates (C)CV(C)CV(C) words
[INFO] [stdout]    |             ------------------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `seq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.13s
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "f083c1d49cfcd6c0480a33189ad5cb31f40c2f6fae2792fd8a94ba50f33f572c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f083c1d49cfcd6c0480a33189ad5cb31f40c2f6fae2792fd8a94ba50f33f572c", kill_on_drop: false }`
[INFO] [stdout] f083c1d49cfcd6c0480a33189ad5cb31f40c2f6fae2792fd8a94ba50f33f572c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 64f1113b02d63d9c8cb970557b332ddcf75c0751f3c8ff856623b900a7fc8bc3
[INFO] running `Command { std: "docker" "start" "-a" "64f1113b02d63d9c8cb970557b332ddcf75c0751f3c8ff856623b900a7fc8bc3", kill_on_drop: false }`
[INFO] [stderr]    Compiling word_generator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:10:13
[INFO] [stdout]    |
[INFO] [stdout] 10 |         let mut v = vec![$($e),*];
[INFO] [stdout]    |             ----^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 72 |     let v = seq![opt!(C), C, V, opt!(C), C, V, opt!(C)]; // generates (C)CV(C)CV(C) words
[INFO] [stdout]    |             ------------------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `seq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.46s
[INFO] running `Command { std: "docker" "inspect" "64f1113b02d63d9c8cb970557b332ddcf75c0751f3c8ff856623b900a7fc8bc3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64f1113b02d63d9c8cb970557b332ddcf75c0751f3c8ff856623b900a7fc8bc3", kill_on_drop: false }`
[INFO] [stdout] 64f1113b02d63d9c8cb970557b332ddcf75c0751f3c8ff856623b900a7fc8bc3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 0edfbe1472d5e5e9e412dc59aba42607c67bc96056fb3f0b988f0a8045213bb1
[INFO] running `Command { std: "docker" "start" "-a" "0edfbe1472d5e5e9e412dc59aba42607c67bc96056fb3f0b988f0a8045213bb1", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:10:13
[INFO] [stderr]    |
[INFO] [stderr] 10 |         let mut v = vec![$($e),*];
[INFO] [stderr]    |             ----^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] ...
[INFO] [stderr] 72 |     let v = seq![opt!(C), C, V, opt!(C), C, V, opt!(C)]; // generates (C)CV(C)CV(C) words
[INFO] [stderr]    |             ------------------------------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr]    = note: this warning originates in the macro `seq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: `word_generator` (bin "word_generator" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 3.79s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/word_generator-780ea9270b84cacf)
[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" "0edfbe1472d5e5e9e412dc59aba42607c67bc96056fb3f0b988f0a8045213bb1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0edfbe1472d5e5e9e412dc59aba42607c67bc96056fb3f0b988f0a8045213bb1", kill_on_drop: false }`
[INFO] [stdout] 0edfbe1472d5e5e9e412dc59aba42607c67bc96056fb3f0b988f0a8045213bb1