[INFO] cloning repository https://github.com/MDBijman/alphabet-cover-problem
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/MDBijman/alphabet-cover-problem" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMDBijman%2Falphabet-cover-problem", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMDBijman%2Falphabet-cover-problem'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f1fdef9ba017d74f133f3bfb8451630f104da55b
[INFO] checking MDBijman/alphabet-cover-problem against try#f3dc08d20a1589b87bde75bb82ee6423307f9bde for pr-135733
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMDBijman%2Falphabet-cover-problem" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/MDBijman/alphabet-cover-problem on toolchain f3dc08d20a1589b87bde75bb82ee6423307f9bde
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f3dc08d20a1589b87bde75bb82ee6423307f9bde" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/MDBijman/alphabet-cover-problem
[INFO] finished tweaking git repo https://github.com/MDBijman/alphabet-cover-problem
[INFO] tweaked toml for git repo https://github.com/MDBijman/alphabet-cover-problem written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/MDBijman/alphabet-cover-problem 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" "+f3dc08d20a1589b87bde75bb82ee6423307f9bde" "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
[ERROR] error running command: no output for 300 seconds
[INFO] checking MDBijman/alphabet-cover-problem against try#f3dc08d20a1589b87bde75bb82ee6423307f9bde for pr-135733
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMDBijman%2Falphabet-cover-problem" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/MDBijman/alphabet-cover-problem on toolchain f3dc08d20a1589b87bde75bb82ee6423307f9bde
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f3dc08d20a1589b87bde75bb82ee6423307f9bde" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/MDBijman/alphabet-cover-problem
[INFO] finished tweaking git repo https://github.com/MDBijman/alphabet-cover-problem
[INFO] tweaked toml for git repo https://github.com/MDBijman/alphabet-cover-problem written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/MDBijman/alphabet-cover-problem 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" "+f3dc08d20a1589b87bde75bb82ee6423307f9bde" "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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+f3dc08d20a1589b87bde75bb82ee6423307f9bde" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 218362dcfe3f26e4ac7f1c8d6571854979928fd517c1ce9e9312c33ef75dd8ab
[INFO] running `Command { std: "docker" "start" "-a" "218362dcfe3f26e4ac7f1c8d6571854979928fd517c1ce9e9312c33ef75dd8ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "218362dcfe3f26e4ac7f1c8d6571854979928fd517c1ce9e9312c33ef75dd8ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "218362dcfe3f26e4ac7f1c8d6571854979928fd517c1ce9e9312c33ef75dd8ab", kill_on_drop: false }`
[INFO] [stdout] 218362dcfe3f26e4ac7f1c8d6571854979928fd517c1ce9e9312c33ef75dd8ab
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+f3dc08d20a1589b87bde75bb82ee6423307f9bde" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 71bda508960a27392b363433da27d04dee7a3df4b3ef717ce96371ab7f4f96d5
[INFO] running `Command { std: "docker" "start" "-a" "71bda508960a27392b363433da27d04dee7a3df4b3ef717ce96371ab7f4f96d5", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking nom v7.1.1
[INFO] [stderr]     Checking standup-maths-challenge v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `newline`
[INFO] [stdout]  --> src/main.rs:3:41
[INFO] [stdout]   |
[INFO] [stdout] 3 |     character::complete::{alpha1, char, newline},
[INFO] [stdout]   |                                         ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `newline`
[INFO] [stdout]  --> src/main.rs:3:41
[INFO] [stdout]   |
[INFO] [stdout] 3 |     character::complete::{alpha1, char, newline},
[INFO] [stdout]   |                                         ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.18s
[INFO] running `Command { std: "docker" "inspect" "71bda508960a27392b363433da27d04dee7a3df4b3ef717ce96371ab7f4f96d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71bda508960a27392b363433da27d04dee7a3df4b3ef717ce96371ab7f4f96d5", kill_on_drop: false }`
[INFO] [stdout] 71bda508960a27392b363433da27d04dee7a3df4b3ef717ce96371ab7f4f96d5