[INFO] cloning repository https://github.com/fal-works/rust-practice
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fal-works/rust-practice" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffal-works%2Frust-practice", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffal-works%2Frust-practice'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9b22b6a8a9e5dee6e57755da1345467214e186a8
[INFO] checking fal-works/rust-practice against master#a609fb45efad59dfd459c76e50899be9f0583b5a for pr-80579
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffal-works%2Frust-practice" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fal-works/rust-practice on toolchain a609fb45efad59dfd459c76e50899be9f0583b5a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/fal-works/rust-practice
[INFO] finished tweaking git repo https://github.com/fal-works/rust-practice
[INFO] tweaked toml for git repo https://github.com/fal-works/rust-practice written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/fal-works/rust-practice already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8dce8fe58a49822b96f9b11d78d36b340d06c4eee85b412838b46f85f98c0fb4
[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" "8dce8fe58a49822b96f9b11d78d36b340d06c4eee85b412838b46f85f98c0fb4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8dce8fe58a49822b96f9b11d78d36b340d06c4eee85b412838b46f85f98c0fb4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8dce8fe58a49822b96f9b11d78d36b340d06c4eee85b412838b46f85f98c0fb4", kill_on_drop: false }`
[INFO] [stdout] 8dce8fe58a49822b96f9b11d78d36b340d06c4eee85b412838b46f85f98c0fb4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7d2d31d3de93a33a932ba39bca3c30aaa60707a1f1eed5b89b20da217aa8895d
[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" "7d2d31d3de93a33a932ba39bca3c30aaa60707a1f1eed5b89b20da217aa8895d", 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] [stderr]     Checking rust-practice v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/main.rs:3:65
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn scan<T>(s: &mut StdinLock, initial_value: T, fold_callback: &Fn(T, char) -> T) -> T {
[INFO] [stdout]   |                                                                 ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(T, char) -> T`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/main.rs:3:65
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn scan<T>(s: &mut StdinLock, initial_value: T, fold_callback: &Fn(T, char) -> T) -> T {
[INFO] [stdout]   |                                                                 ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(T, char) -> T`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.00s
[INFO] running `Command { std: "docker" "inspect" "7d2d31d3de93a33a932ba39bca3c30aaa60707a1f1eed5b89b20da217aa8895d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d2d31d3de93a33a932ba39bca3c30aaa60707a1f1eed5b89b20da217aa8895d", kill_on_drop: false }`
[INFO] [stdout] 7d2d31d3de93a33a932ba39bca3c30aaa60707a1f1eed5b89b20da217aa8895d