[INFO] cloning repository https://github.com/tiny-browserbook/exercise-rendering-tree
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tiny-browserbook/exercise-rendering-tree" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftiny-browserbook%2Fexercise-rendering-tree", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftiny-browserbook%2Fexercise-rendering-tree'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 52ba96b59bd81422a97a8caa975f4f04a7e8f63e
[INFO] checking tiny-browserbook/exercise-rendering-tree against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftiny-browserbook%2Fexercise-rendering-tree" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tiny-browserbook/exercise-rendering-tree on toolchain a7a572ce3edd6d476191fbfe92c9c1986e009b34
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tiny-browserbook/exercise-rendering-tree
[INFO] finished tweaking git repo https://github.com/tiny-browserbook/exercise-rendering-tree
[INFO] tweaked toml for git repo https://github.com/tiny-browserbook/exercise-rendering-tree written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/tiny-browserbook/exercise-rendering-tree already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--no-deps" "--format-version=1", 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] f5f17a2e2c84a82de1f8e2870015a5d70ce2f74e1daf74bdbec20bbdcf106051
[INFO] running `Command { std: "docker" "start" "-a" "f5f17a2e2c84a82de1f8e2870015a5d70ce2f74e1daf74bdbec20bbdcf106051", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f5f17a2e2c84a82de1f8e2870015a5d70ce2f74e1daf74bdbec20bbdcf106051", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5f17a2e2c84a82de1f8e2870015a5d70ce2f74e1daf74bdbec20bbdcf106051", kill_on_drop: false }`
[INFO] [stdout] f5f17a2e2c84a82de1f8e2870015a5d70ce2f74e1daf74bdbec20bbdcf106051
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d9a773804d3adc5a6c877f3bb92ae2fc6260fb8fb37424f07799d383c916aca5
[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" "d9a773804d3adc5a6c877f3bb92ae2fc6260fb8fb37424f07799d383c916aca5", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking bytes v1.0.1
[INFO] [stderr]     Checking combine v4.5.2
[INFO] [stderr]     Checking exercise-rendering-tree v0.1.0 (/tmp/fixit)
[INFO] [stderr]    Migrating src/lib.rs from 2018 edition to 2021
[INFO] [stderr]        Fixed src/style.rs (2 fixes)
[INFO] [stderr]        Fixed src/css.rs (2 fixes)
[INFO] [stderr]    Migrating src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.83s
[INFO] [stderr] Running `cargo check` to verify 2021
[INFO] [stderr]     Checking exercise-rendering-tree v0.1.0 (/tmp/fixit)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `Command { std: "docker" "inspect" "d9a773804d3adc5a6c877f3bb92ae2fc6260fb8fb37424f07799d383c916aca5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9a773804d3adc5a6c877f3bb92ae2fc6260fb8fb37424f07799d383c916aca5", kill_on_drop: false }`
[INFO] [stdout] d9a773804d3adc5a6c877f3bb92ae2fc6260fb8fb37424f07799d383c916aca5