[INFO] cloning repository https://github.com/grigoryk/toy8080
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/grigoryk/toy8080" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgrigoryk%2Ftoy8080", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgrigoryk%2Ftoy8080'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a304ce88d9bc97a3f5ff93908784dc73ac4f2c9a
[INFO] checking grigoryk/toy8080 against master#d2e8ecd8bd26a22111cdebfb813258450b07fbf0 for pr-121199
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgrigoryk%2Ftoy8080" "/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/grigoryk/toy8080 on toolchain d2e8ecd8bd26a22111cdebfb813258450b07fbf0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d2e8ecd8bd26a22111cdebfb813258450b07fbf0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/grigoryk/toy8080
[INFO] finished tweaking git repo https://github.com/grigoryk/toy8080
[INFO] tweaked toml for git repo https://github.com/grigoryk/toy8080 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/grigoryk/toy8080 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" "+d2e8ecd8bd26a22111cdebfb813258450b07fbf0" "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 grigoryk/toy8080 against try#aface909a877127f24c62858518cef2d593e2ea1 for pr-121199
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgrigoryk%2Ftoy8080" "/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/grigoryk/toy8080 on toolchain aface909a877127f24c62858518cef2d593e2ea1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+aface909a877127f24c62858518cef2d593e2ea1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/grigoryk/toy8080
[INFO] finished tweaking git repo https://github.com/grigoryk/toy8080
[INFO] tweaked toml for git repo https://github.com/grigoryk/toy8080 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/grigoryk/toy8080 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" "+aface909a877127f24c62858518cef2d593e2ea1" "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-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" "+aface909a877127f24c62858518cef2d593e2ea1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d074fef986ba652a6ca54e2a56c45fb7b22c49018950eda188c01a5da4f8c65e
[INFO] running `Command { std: "docker" "start" "-a" "d074fef986ba652a6ca54e2a56c45fb7b22c49018950eda188c01a5da4f8c65e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d074fef986ba652a6ca54e2a56c45fb7b22c49018950eda188c01a5da4f8c65e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d074fef986ba652a6ca54e2a56c45fb7b22c49018950eda188c01a5da4f8c65e", kill_on_drop: false }`
[INFO] [stdout] d074fef986ba652a6ca54e2a56c45fb7b22c49018950eda188c01a5da4f8c65e
[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" "+aface909a877127f24c62858518cef2d593e2ea1" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f162863694da8ee5738c651b4f95f5223e49d892da3bc664e466f49d05215aef
[INFO] running `Command { std: "docker" "start" "-a" "f162863694da8ee5738c651b4f95f5223e49d892da3bc664e466f49d05215aef", kill_on_drop: false }`
[INFO] [stderr]     Checking toy8080 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: enum `Register` is never used
[INFO] [stdout]  --> src/state.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub enum Register {
[INFO] [stdout]   |          ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Register` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Register` is never used
[INFO] [stdout]  --> src/state.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub enum Register {
[INFO] [stdout]   |          ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Register` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Di` and `Unused` are never constructed
[INFO] [stdout]   --> src/instructions.rs:98:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub enum Cmd {
[INFO] [stdout]    |          --- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 98 |     Di, // special
[INFO] [stdout]    |     ^^
[INFO] [stdout] 99 |     Unused, // ???
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Cmd` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Di` and `Unused` are never constructed
[INFO] [stdout]   --> src/instructions.rs:98:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub enum Cmd {
[INFO] [stdout]    |          --- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 98 |     Di, // special
[INFO] [stdout]    |     ^^
[INFO] [stdout] 99 |     Unused, // ???
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Cmd` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] running `Command { std: "docker" "inspect" "f162863694da8ee5738c651b4f95f5223e49d892da3bc664e466f49d05215aef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f162863694da8ee5738c651b4f95f5223e49d892da3bc664e466f49d05215aef", kill_on_drop: false }`
[INFO] [stdout] f162863694da8ee5738c651b4f95f5223e49d892da3bc664e466f49d05215aef