[INFO] cloning repository https://github.com/tnecio/five_letter_words
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tnecio/five_letter_words" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftnecio%2Ffive_letter_words", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftnecio%2Ffive_letter_words'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cbd28f68e4b69704ebae26325383a17f9a940361
[INFO] checking tnecio/five_letter_words against master#00bfd6b2734d9c28a147bf237490995731781fdd for pr-117984
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftnecio%2Ffive_letter_words" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tnecio/five_letter_words on toolchain 00bfd6b2734d9c28a147bf237490995731781fdd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+00bfd6b2734d9c28a147bf237490995731781fdd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tnecio/five_letter_words
[INFO] finished tweaking git repo https://github.com/tnecio/five_letter_words
[INFO] tweaked toml for git repo https://github.com/tnecio/five_letter_words written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/tnecio/five_letter_words 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" "+00bfd6b2734d9c28a147bf237490995731781fdd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: target.x86_64-unknown-linux-gnu.linker
[INFO] [stderr] warning: unused manifest key: target.x86_64-unknown-linux-gnu.rustflags
[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
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking tnecio/five_letter_words against try#aa7c6ba69acce8b10a275eabfe6157ea72c8b599 for pr-117984
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftnecio%2Ffive_letter_words" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tnecio/five_letter_words on toolchain aa7c6ba69acce8b10a275eabfe6157ea72c8b599
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+aa7c6ba69acce8b10a275eabfe6157ea72c8b599" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tnecio/five_letter_words
[INFO] finished tweaking git repo https://github.com/tnecio/five_letter_words
[INFO] tweaked toml for git repo https://github.com/tnecio/five_letter_words written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/tnecio/five_letter_words 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" "+aa7c6ba69acce8b10a275eabfe6157ea72c8b599" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: target.x86_64-unknown-linux-gnu.linker
[INFO] [stderr] warning: unused manifest key: target.x86_64-unknown-linux-gnu.rustflags
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded prettytable-rs v0.9.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+aa7c6ba69acce8b10a275eabfe6157ea72c8b599" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 51a870241e2410162f15b419444384b543bea05106e9dbfc2873ac78c82679bd
[INFO] running `Command { std: "docker" "start" "-a" "51a870241e2410162f15b419444384b543bea05106e9dbfc2873ac78c82679bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "51a870241e2410162f15b419444384b543bea05106e9dbfc2873ac78c82679bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51a870241e2410162f15b419444384b543bea05106e9dbfc2873ac78c82679bd", kill_on_drop: false }`
[INFO] [stdout] 51a870241e2410162f15b419444384b543bea05106e9dbfc2873ac78c82679bd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+aa7c6ba69acce8b10a275eabfe6157ea72c8b599" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 99d5dca5cb188d6f68b516d6890531e53cf7037755bac029ead05604fde98824
[INFO] running `Command { std: "docker" "start" "-a" "99d5dca5cb188d6f68b516d6890531e53cf7037755bac029ead05604fde98824", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: target.x86_64-unknown-linux-gnu.linker
[INFO] [stderr] warning: unused manifest key: target.x86_64-unknown-linux-gnu.rustflags
[INFO] [stderr]    Compiling crossbeam-utils v0.8.12
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.11
[INFO] [stderr]    Compiling serde v1.0.147
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking either v1.8.0
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]     Checking encode_unicode v1.0.0
[INFO] [stderr]     Checking unicode-width v0.1.10
[INFO] [stderr]     Checking rustc-hash v1.1.0
[INFO] [stderr]     Checking dirs-sys-next v0.1.2
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking dirs-next v2.0.0
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking term v0.7.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.6
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking crossbeam-deque v0.8.2
[INFO] [stderr]     Checking rayon-core v1.9.3
[INFO] [stderr]     Checking rayon v1.5.3
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking prettytable-rs v0.9.0
[INFO] [stderr]     Checking five_letter_words v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated items `from_bool_columns` and `print` are never used
[INFO] [stdout]    --> src/dancing_links_soa.rs:147:8
[INFO] [stdout]     |
[INFO] [stdout] 31  | impl DLMatrix {
[INFO] [stdout]     | ------------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 147 |     fn from_bool_columns(columns: &Vec<Vec<bool>>) -> Self {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 412 |     fn print(&self) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `transpose` is never used
[INFO] [stdout]    --> src/dancing_links_soa.rs:617:4
[INFO] [stdout]     |
[INFO] [stdout] 617 | fn transpose<T>(v: Vec<Vec<T>>) -> Vec<Vec<T>> {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `transpose` is never used
[INFO] [stdout]    --> src/dancing_links_soa.rs:617:4
[INFO] [stdout]     |
[INFO] [stdout] 617 | fn transpose<T>(v: Vec<Vec<T>>) -> Vec<Vec<T>> {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.96s
[INFO] running `Command { std: "docker" "inspect" "99d5dca5cb188d6f68b516d6890531e53cf7037755bac029ead05604fde98824", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99d5dca5cb188d6f68b516d6890531e53cf7037755bac029ead05604fde98824", kill_on_drop: false }`
[INFO] [stdout] 99d5dca5cb188d6f68b516d6890531e53cf7037755bac029ead05604fde98824