[INFO] cloning repository https://github.com/0xkowloon/rustlings
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/0xkowloon/rustlings" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F0xkowloon%2Frustlings", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F0xkowloon%2Frustlings'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0d6e0a1bd6c12bbf70551331517f91e157178972
[INFO] checking 0xkowloon/rustlings/0d6e0a1bd6c12bbf70551331517f91e157178972 against master#3f6250a7bb79e600d9036bbc7c8f65af43933643 for pr-147859
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F0xkowloon%2Frustlings" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/0xkowloon/rustlings
[INFO] finished tweaking git repo https://github.com/0xkowloon/rustlings
[INFO] tweaked toml for git repo https://github.com/0xkowloon/rustlings written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/0xkowloon/rustlings on toolchain 3f6250a7bb79e600d9036bbc7c8f65af43933643
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3f6250a7bb79e600d9036bbc7c8f65af43933643" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/0xkowloon/rustlings 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" "+3f6250a7bb79e600d9036bbc7c8f65af43933643" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded indicatif v0.16.2
[INFO] [stderr]   Downloaded console v0.15.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+3f6250a7bb79e600d9036bbc7c8f65af43933643" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7e413273c1854761062ba33c8c508933c3feaa9ea585b6451c7ab6f5337d8719
[INFO] running `Command { std: "docker" "start" "-a" "7e413273c1854761062ba33c8c508933c3feaa9ea585b6451c7ab6f5337d8719", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7e413273c1854761062ba33c8c508933c3feaa9ea585b6451c7ab6f5337d8719", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e413273c1854761062ba33c8c508933c3feaa9ea585b6451c7ab6f5337d8719", kill_on_drop: false }`
[INFO] [stdout] 7e413273c1854761062ba33c8c508933c3feaa9ea585b6451c7ab6f5337d8719
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+3f6250a7bb79e600d9036bbc7c8f65af43933643" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 987701db270aec0d1db3ce5db735829bb6ca23e2e63765c8c5a2a641edb160fb
[INFO] running `Command { std: "docker" "start" "-a" "987701db270aec0d1db3ce5db735829bb6ca23e2e63765c8c5a2a641edb160fb", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking once_cell v1.10.0
[INFO] [stderr]     Checking toml v0.5.9
[INFO] [stderr]     Checking console v0.15.0
[INFO] [stderr]     Checking indicatif v0.16.2
[INFO] [stderr]     Checking rustlings v4.7.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking float-cmp v0.8.0
[INFO] [stderr]     Checking predicates v1.0.8
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/exercise.rs:109:20
[INFO] [stdout]     |
[INFO] [stdout] 109 |     pub fn compile(&self) -> Result<CompiledExercise, ExerciseOutput> {
[INFO] [stdout]     |                    ^^^^^            ^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 109 |     pub fn compile(&self) -> Result<CompiledExercise<'_>, ExerciseOutput> {
[INFO] [stdout]     |                                                     ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking assert_cmd v0.11.1
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/exercise.rs:109:20
[INFO] [stdout]     |
[INFO] [stdout] 109 |     pub fn compile(&self) -> Result<CompiledExercise, ExerciseOutput> {
[INFO] [stdout]     |                    ^^^^^            ^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 109 |     pub fn compile(&self) -> Result<CompiledExercise<'_>, ExerciseOutput> {
[INFO] [stdout]     |                                                     ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.34s
[INFO] running `Command { std: "docker" "inspect" "987701db270aec0d1db3ce5db735829bb6ca23e2e63765c8c5a2a641edb160fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "987701db270aec0d1db3ce5db735829bb6ca23e2e63765c8c5a2a641edb160fb", kill_on_drop: false }`
[INFO] [stdout] 987701db270aec0d1db3ce5db735829bb6ca23e2e63765c8c5a2a641edb160fb
