[INFO] cloning repository https://github.com/laurix-dev/turing_machine_ufu
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/laurix-dev/turing_machine_ufu" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flaurix-dev%2Fturing_machine_ufu", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flaurix-dev%2Fturing_machine_ufu'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 68d44fb1283f561b13174109ffd7081416877016
[INFO] checking laurix-dev/turing_machine_ufu against master#426a60abc213b28a7c7198e475476b6e650d871f for pr-129199
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flaurix-dev%2Fturing_machine_ufu" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/laurix-dev/turing_machine_ufu on toolchain 426a60abc213b28a7c7198e475476b6e650d871f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+426a60abc213b28a7c7198e475476b6e650d871f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/laurix-dev/turing_machine_ufu
[INFO] finished tweaking git repo https://github.com/laurix-dev/turing_machine_ufu
[INFO] tweaked toml for git repo https://github.com/laurix-dev/turing_machine_ufu written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/laurix-dev/turing_machine_ufu 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" "+426a60abc213b28a7c7198e475476b6e650d871f" "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
[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 laurix-dev/turing_machine_ufu against try#2c70eb47850052381670935f807d41647a7dc992 for pr-129199
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flaurix-dev%2Fturing_machine_ufu" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/laurix-dev/turing_machine_ufu on toolchain 2c70eb47850052381670935f807d41647a7dc992
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2c70eb47850052381670935f807d41647a7dc992" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/laurix-dev/turing_machine_ufu
[INFO] finished tweaking git repo https://github.com/laurix-dev/turing_machine_ufu
[INFO] tweaked toml for git repo https://github.com/laurix-dev/turing_machine_ufu written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/laurix-dev/turing_machine_ufu 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" "+2c70eb47850052381670935f807d41647a7dc992" "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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+2c70eb47850052381670935f807d41647a7dc992" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a85d788f31496206a159c618113eae504b40649fccd7306738844da0b0401b3a
[INFO] running `Command { std: "docker" "start" "-a" "a85d788f31496206a159c618113eae504b40649fccd7306738844da0b0401b3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a85d788f31496206a159c618113eae504b40649fccd7306738844da0b0401b3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a85d788f31496206a159c618113eae504b40649fccd7306738844da0b0401b3a", kill_on_drop: false }`
[INFO] [stdout] a85d788f31496206a159c618113eae504b40649fccd7306738844da0b0401b3a
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+2c70eb47850052381670935f807d41647a7dc992" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8c21dd8b60f8ae762e4e96634c25feab2257895b3e0568faf304747668d678c0
[INFO] running `Command { std: "docker" "start" "-a" "8c21dd8b60f8ae762e4e96634c25feab2257895b3e0568faf304747668d678c0", kill_on_drop: false }`
[INFO] [stderr]     Checking text_io v0.1.12
[INFO] [stderr]     Checking turing v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `word` and `white_symbol` are never read
[INFO] [stdout]   --> src/tape.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct Tape {
[INFO] [stdout]    |            ---- fields in this struct
[INFO] [stdout] 16 |     pub word: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 17 |     pub white_symbol: char,
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Tape` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `word` and `white_symbol` are never read
[INFO] [stdout]   --> src/tape.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct Tape {
[INFO] [stdout]    |            ---- fields in this struct
[INFO] [stdout] 16 |     pub word: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 17 |     pub white_symbol: char,
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Tape` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` 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` profile [unoptimized + debuginfo] target(s) in 0.18s
[INFO] running `Command { std: "docker" "inspect" "8c21dd8b60f8ae762e4e96634c25feab2257895b3e0568faf304747668d678c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c21dd8b60f8ae762e4e96634c25feab2257895b3e0568faf304747668d678c0", kill_on_drop: false }`
[INFO] [stdout] 8c21dd8b60f8ae762e4e96634c25feab2257895b3e0568faf304747668d678c0