[INFO] cloning repository https://github.com/Cancain/rust_sandbox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Cancain/rust_sandbox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCancain%2Frust_sandbox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCancain%2Frust_sandbox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9aa9e99db796b8fb451f61161b6cb0b9a0eeeb01
[INFO] testing Cancain/rust_sandbox against 1.47.0 for beta-1.48-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCancain%2Frust_sandbox" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Cancain/rust_sandbox on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Cancain/rust_sandbox
[INFO] finished tweaking git repo https://github.com/Cancain/rust_sandbox
[INFO] tweaked toml for git repo https://github.com/Cancain/rust_sandbox written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/Cancain/rust_sandbox already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ef4196815059f931738fffb2e8960ea43aaf2266555c70e7b65cfaf3df922032
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ef4196815059f931738fffb2e8960ea43aaf2266555c70e7b65cfaf3df922032", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ef4196815059f931738fffb2e8960ea43aaf2266555c70e7b65cfaf3df922032", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef4196815059f931738fffb2e8960ea43aaf2266555c70e7b65cfaf3df922032", kill_on_drop: false }`
[INFO] [stdout] ef4196815059f931738fffb2e8960ea43aaf2266555c70e7b65cfaf3df922032
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dc78019f4b9ffdec4046ce471819ceeff8003c969d28ecff5dcd9aa99c166d65
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "dc78019f4b9ffdec4046ce471819ceeff8003c969d28ecff5dcd9aa99c166d65", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling getrandom v0.1.13
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]    Compiling rand v0.7.2
[INFO] [stderr]    Compiling word_generator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]  --> src/main.rs:5:32
[INFO] [stdout]   |
[INFO] [stdout] 5 |     generator::generate_word();;
[INFO] [stdout]   |                                ^ help: remove this semicolon
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vocals`
[INFO] [stdout]  --> src/generator/mod.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let vocals = vec!['a', 'e', 'i', 'o', 'u', 'y'];
[INFO] [stdout]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_vocals`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.72s
[INFO] running `Command { std: "docker" "inspect" "dc78019f4b9ffdec4046ce471819ceeff8003c969d28ecff5dcd9aa99c166d65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc78019f4b9ffdec4046ce471819ceeff8003c969d28ecff5dcd9aa99c166d65", kill_on_drop: false }`
[INFO] [stdout] dc78019f4b9ffdec4046ce471819ceeff8003c969d28ecff5dcd9aa99c166d65
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 898884c5c53d04268b75fc8045297328a8c106eb50a36e4e9260ae26168776d8
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "898884c5c53d04268b75fc8045297328a8c106eb50a36e4e9260ae26168776d8", kill_on_drop: false }`
[INFO] [stderr]    Compiling word_generator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]  --> src/main.rs:5:32
[INFO] [stdout]   |
[INFO] [stdout] 5 |     generator::generate_word();;
[INFO] [stdout]   |                                ^ help: remove this semicolon
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vocals`
[INFO] [stdout]  --> src/generator/mod.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let vocals = vec!['a', 'e', 'i', 'o', 'u', 'y'];
[INFO] [stdout]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_vocals`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.80s
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "898884c5c53d04268b75fc8045297328a8c106eb50a36e4e9260ae26168776d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "898884c5c53d04268b75fc8045297328a8c106eb50a36e4e9260ae26168776d8", kill_on_drop: false }`
[INFO] [stdout] 898884c5c53d04268b75fc8045297328a8c106eb50a36e4e9260ae26168776d8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 30104e5ea3f5c3fc18bc53a618044dc9ee929da774a9bfdfd77b5bfb3aa36dd4
[INFO] running `Command { std: "docker" "start" "-a" "30104e5ea3f5c3fc18bc53a618044dc9ee929da774a9bfdfd77b5bfb3aa36dd4", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]  --> src/main.rs:5:32
[INFO] [stderr]   |
[INFO] [stderr] 5 |     generator::generate_word();;
[INFO] [stderr]   |                                ^ help: remove this semicolon
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `vocals`
[INFO] [stderr]  --> src/generator/mod.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let vocals = vec!['a', 'e', 'i', 'o', 'u', 'y'];
[INFO] [stderr]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_vocals`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/word_generator-680754ef984880a9
[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
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "30104e5ea3f5c3fc18bc53a618044dc9ee929da774a9bfdfd77b5bfb3aa36dd4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "30104e5ea3f5c3fc18bc53a618044dc9ee929da774a9bfdfd77b5bfb3aa36dd4", kill_on_drop: false }`
[INFO] [stdout] 30104e5ea3f5c3fc18bc53a618044dc9ee929da774a9bfdfd77b5bfb3aa36dd4