[INFO] cloning repository https://github.com/mathis2003/kernos
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mathis2003/kernos" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmathis2003%2Fkernos", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmathis2003%2Fkernos'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b3b282fd54412b597723aed683962ede942fe9c0
[INFO] checking mathis2003/kernos against try#2b39fe756f52bc2825bf5b2bfc385cab922dae10 for pr-143011
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmathis2003%2Fkernos" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mathis2003/kernos
[INFO] finished tweaking git repo https://github.com/mathis2003/kernos
[INFO] tweaked toml for git repo https://github.com/mathis2003/kernos written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mathis2003/kernos on toolchain 2b39fe756f52bc2825bf5b2bfc385cab922dae10
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mathis2003/kernos 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" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "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 mathis2003/kernos against try#2b39fe756f52bc2825bf5b2bfc385cab922dae10 for pr-143011
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmathis2003%2Fkernos" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mathis2003/kernos
[INFO] finished tweaking git repo https://github.com/mathis2003/kernos
[INFO] tweaked toml for git repo https://github.com/mathis2003/kernos written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mathis2003/kernos on toolchain 2b39fe756f52bc2825bf5b2bfc385cab922dae10
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mathis2003/kernos 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" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a3e7dc5ac08c8f19500f0f8da7d9d328db5fc3f7016417994924869e684d026a
[INFO] running `Command { std: "docker" "start" "-a" "a3e7dc5ac08c8f19500f0f8da7d9d328db5fc3f7016417994924869e684d026a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a3e7dc5ac08c8f19500f0f8da7d9d328db5fc3f7016417994924869e684d026a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3e7dc5ac08c8f19500f0f8da7d9d328db5fc3f7016417994924869e684d026a", kill_on_drop: false }`
[INFO] [stdout] a3e7dc5ac08c8f19500f0f8da7d9d328db5fc3f7016417994924869e684d026a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 71fe4662de88ebc5a29d5733cffdf117ab9dbdacc304e4a0b72137b9523123e5
[INFO] running `Command { std: "docker" "start" "-a" "71fe4662de88ebc5a29d5733cffdf117ab9dbdacc304e4a0b72137b9523123e5", kill_on_drop: false }`
[INFO] [stderr]     Checking kernos v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `Keyword` is never constructed
[INFO] [stdout]  --> src/parser/keyword.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Keyword(String);
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `KEYWORDS` is never used
[INFO] [stdout]  --> src/parser/keyword.rs:6:7
[INFO] [stdout]   |
[INFO] [stdout] 6 | const KEYWORDS: &[&str] = &["if", "then", "else", "struct", "variant", "return"];
[INFO] [stdout]   |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse_keyword` is never used
[INFO] [stdout]  --> src/parser/keyword.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn parse_keyword(chars: &[char]) -> ParseResult<Keyword> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/parser/number.rs:4:19
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Number(i64);
[INFO] [stdout]   |            ------ ^^^
[INFO] [stdout]   |            |
[INFO] [stdout]   |            field in this struct
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider removing this field
[INFO] [stdout]   = note: `Number` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Keyword` is never constructed
[INFO] [stdout]  --> src/parser/keyword.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Keyword(String);
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `KEYWORDS` is never used
[INFO] [stdout]  --> src/parser/keyword.rs:6:7
[INFO] [stdout]   |
[INFO] [stdout] 6 | const KEYWORDS: &[&str] = &["if", "then", "else", "struct", "variant", "return"];
[INFO] [stdout]   |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse_keyword` is never used
[INFO] [stdout]  --> src/parser/keyword.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn parse_keyword(chars: &[char]) -> ParseResult<Keyword> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/parser/number.rs:4:19
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Number(i64);
[INFO] [stdout]   |            ------ ^^^
[INFO] [stdout]   |            |
[INFO] [stdout]   |            field in this struct
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider removing this field
[INFO] [stdout]   = note: `Number` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] running `Command { std: "docker" "inspect" "71fe4662de88ebc5a29d5733cffdf117ab9dbdacc304e4a0b72137b9523123e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71fe4662de88ebc5a29d5733cffdf117ab9dbdacc304e4a0b72137b9523123e5", kill_on_drop: false }`
[INFO] [stdout] 71fe4662de88ebc5a29d5733cffdf117ab9dbdacc304e4a0b72137b9523123e5