[INFO] cloning repository https://github.com/decaby7e/rust-ball
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/decaby7e/rust-ball" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdecaby7e%2Frust-ball", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdecaby7e%2Frust-ball'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 43c8e5f440a36f8947e74fb4746dca2c65c5c7bf
[INFO] building decaby7e/rust-ball against master#9bd71afb90c2a6e0348cdd4a2b10a3bf39908f19 for pr-117684
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdecaby7e%2Frust-ball" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/decaby7e/rust-ball on toolchain 9bd71afb90c2a6e0348cdd4a2b10a3bf39908f19
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9bd71afb90c2a6e0348cdd4a2b10a3bf39908f19" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/decaby7e/rust-ball
[INFO] finished tweaking git repo https://github.com/decaby7e/rust-ball
[INFO] tweaked toml for git repo https://github.com/decaby7e/rust-ball written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/decaby7e/rust-ball 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" "+9bd71afb90c2a6e0348cdd4a2b10a3bf39908f19" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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] building decaby7e/rust-ball against try#53e03135c36e913ff664ce8329041b7e3c2fd358 for pr-117684
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdecaby7e%2Frust-ball" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/decaby7e/rust-ball on toolchain 53e03135c36e913ff664ce8329041b7e3c2fd358
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+53e03135c36e913ff664ce8329041b7e3c2fd358" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/decaby7e/rust-ball
[INFO] finished tweaking git repo https://github.com/decaby7e/rust-ball
[INFO] tweaked toml for git repo https://github.com/decaby7e/rust-ball written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/decaby7e/rust-ball 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" "+53e03135c36e913ff664ce8329041b7e3c2fd358" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] building decaby7e/rust-ball against try#53e03135c36e913ff664ce8329041b7e3c2fd358 for pr-117684
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdecaby7e%2Frust-ball" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/decaby7e/rust-ball on toolchain 53e03135c36e913ff664ce8329041b7e3c2fd358
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+53e03135c36e913ff664ce8329041b7e3c2fd358" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/decaby7e/rust-ball
[INFO] finished tweaking git repo https://github.com/decaby7e/rust-ball
[INFO] tweaked toml for git repo https://github.com/decaby7e/rust-ball written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/decaby7e/rust-ball 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" "+53e03135c36e913ff664ce8329041b7e3c2fd358" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded term_size v0.3.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:0c7e0e8312ad82a1bed3696438480b7da990d348377d3754e1cd95b06a8a36c7" "/opt/rustwide/cargo-home/bin/cargo" "+53e03135c36e913ff664ce8329041b7e3c2fd358" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fcd70d989b97f70550d20c1c4a2832bb0e203608adbdff380e0a9b407b6a3552
[INFO] running `Command { std: "docker" "start" "-a" "fcd70d989b97f70550d20c1c4a2832bb0e203608adbdff380e0a9b407b6a3552", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fcd70d989b97f70550d20c1c4a2832bb0e203608adbdff380e0a9b407b6a3552", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fcd70d989b97f70550d20c1c4a2832bb0e203608adbdff380e0a9b407b6a3552", kill_on_drop: false }`
[INFO] [stdout] fcd70d989b97f70550d20c1c4a2832bb0e203608adbdff380e0a9b407b6a3552
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:0c7e0e8312ad82a1bed3696438480b7da990d348377d3754e1cd95b06a8a36c7" "/opt/rustwide/cargo-home/bin/cargo" "+53e03135c36e913ff664ce8329041b7e3c2fd358" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 64120281bf70ff0d4bc35064c7576fb026687b15313d211e70bc8a72d2acd5bb
[INFO] running `Command { std: "docker" "start" "-a" "64120281bf70ff0d4bc35064c7576fb026687b15313d211e70bc8a72d2acd5bb", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.112
[INFO] [stderr]    Compiling term_size v0.3.2
[INFO] [stderr]    Compiling rust-demo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `term_size`
[INFO] [stdout]  --> balls.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use term_size;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> balls.rs:84:9
[INFO] [stdout]    |
[INFO] [stdout] 84 |         io::stdout().write_all(row);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 84 |         let _ = io::stdout().write_all(row);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> balls.rs:85:9
[INFO] [stdout]    |
[INFO] [stdout] 85 |         io::stdout().write(&['\n' as u8]);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 85 |         let _ = io::stdout().write(&['\n' as u8]);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.16s
[INFO] running `Command { std: "docker" "inspect" "64120281bf70ff0d4bc35064c7576fb026687b15313d211e70bc8a72d2acd5bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64120281bf70ff0d4bc35064c7576fb026687b15313d211e70bc8a72d2acd5bb", kill_on_drop: false }`
[INFO] [stdout] 64120281bf70ff0d4bc35064c7576fb026687b15313d211e70bc8a72d2acd5bb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:0c7e0e8312ad82a1bed3696438480b7da990d348377d3754e1cd95b06a8a36c7" "/opt/rustwide/cargo-home/bin/cargo" "+53e03135c36e913ff664ce8329041b7e3c2fd358" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b51897589aeebb642cd6fdb4347d3944067cdb738d4127304d345af42ee79f8c
[INFO] running `Command { std: "docker" "start" "-a" "b51897589aeebb642cd6fdb4347d3944067cdb738d4127304d345af42ee79f8c", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-demo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `term_size`
[INFO] [stdout]  --> balls.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use term_size;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> balls.rs:84:9
[INFO] [stdout]    |
[INFO] [stdout] 84 |         io::stdout().write_all(row);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 84 |         let _ = io::stdout().write_all(row);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> balls.rs:85:9
[INFO] [stdout]    |
[INFO] [stdout] 85 |         io::stdout().write(&['\n' as u8]);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 85 |         let _ = io::stdout().write(&['\n' as u8]);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.38s
[INFO] running `Command { std: "docker" "inspect" "b51897589aeebb642cd6fdb4347d3944067cdb738d4127304d345af42ee79f8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b51897589aeebb642cd6fdb4347d3944067cdb738d4127304d345af42ee79f8c", kill_on_drop: false }`
[INFO] [stdout] b51897589aeebb642cd6fdb4347d3944067cdb738d4127304d345af42ee79f8c