[INFO] cloning repository https://github.com/rafaelcn/doppelganger
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rafaelcn/doppelganger" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frafaelcn%2Fdoppelganger", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frafaelcn%2Fdoppelganger'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9cfa94b9fe899a7db240121e994f8cb7f7eb89c5
[INFO] checking rafaelcn/doppelganger against master#0c1fb2a1e65a57073dc62dd502319a00cf753371 for pr-114655
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frafaelcn%2Fdoppelganger" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rafaelcn/doppelganger on toolchain 0c1fb2a1e65a57073dc62dd502319a00cf753371
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0c1fb2a1e65a57073dc62dd502319a00cf753371" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/rafaelcn/doppelganger
[INFO] finished tweaking git repo https://github.com/rafaelcn/doppelganger
[INFO] tweaked toml for git repo https://github.com/rafaelcn/doppelganger written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/rafaelcn/doppelganger 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" "+0c1fb2a1e65a57073dc62dd502319a00cf753371" "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] checking rafaelcn/doppelganger against try#1d06cad56a6e74d21cdf272bd6d9479160000fba for pr-114655
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frafaelcn%2Fdoppelganger" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rafaelcn/doppelganger on toolchain 1d06cad56a6e74d21cdf272bd6d9479160000fba
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1d06cad56a6e74d21cdf272bd6d9479160000fba" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/rafaelcn/doppelganger
[INFO] finished tweaking git repo https://github.com/rafaelcn/doppelganger
[INFO] tweaked toml for git repo https://github.com/rafaelcn/doppelganger written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/rafaelcn/doppelganger 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" "+1d06cad56a6e74d21cdf272bd6d9479160000fba" "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 rafaelcn/doppelganger against try#1d06cad56a6e74d21cdf272bd6d9479160000fba for pr-114655
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frafaelcn%2Fdoppelganger" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rafaelcn/doppelganger on toolchain 1d06cad56a6e74d21cdf272bd6d9479160000fba
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1d06cad56a6e74d21cdf272bd6d9479160000fba" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/rafaelcn/doppelganger
[INFO] finished tweaking git repo https://github.com/rafaelcn/doppelganger
[INFO] tweaked toml for git repo https://github.com/rafaelcn/doppelganger written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/rafaelcn/doppelganger 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" "+1d06cad56a6e74d21cdf272bd6d9479160000fba" "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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+1d06cad56a6e74d21cdf272bd6d9479160000fba" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f595ca57ab1b140607dc75c4aceb33e86da3093dc35f6d2cc3da54229f41c6cd
[INFO] running `Command { std: "docker" "start" "-a" "f595ca57ab1b140607dc75c4aceb33e86da3093dc35f6d2cc3da54229f41c6cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f595ca57ab1b140607dc75c4aceb33e86da3093dc35f6d2cc3da54229f41c6cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f595ca57ab1b140607dc75c4aceb33e86da3093dc35f6d2cc3da54229f41c6cd", kill_on_drop: false }`
[INFO] [stdout] f595ca57ab1b140607dc75c4aceb33e86da3093dc35f6d2cc3da54229f41c6cd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+1d06cad56a6e74d21cdf272bd6d9479160000fba" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6cb71b6f5c7bceda4d48890194e1d70a24478280c228ed661a7a3e11025690de
[INFO] running `Command { std: "docker" "start" "-a" "6cb71b6f5c7bceda4d48890194e1d70a24478280c228ed661a7a3e11025690de", kill_on_drop: false }`
[INFO] [stderr]     Checking doppelganger v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]   --> src/doppelganger/file.rs:38:16
[INFO] [stdout]    |
[INFO] [stdout] 38 |             Ok(size) => buffer.iter().for_each(|b| hasher.write_u8(*b)),
[INFO] [stdout]    |                ^^^^ help: if this is intentional, prefix it with an underscore: `_size`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]   --> src/doppelganger/file.rs:38:16
[INFO] [stdout]    |
[INFO] [stdout] 38 |             Ok(size) => buffer.iter().for_each(|b| hasher.write_u8(*b)),
[INFO] [stdout]    |                ^^^^ help: if this is intentional, prefix it with an underscore: `_size`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `k`
[INFO] [stdout]   --> src/main.rs:54:27
[INFO] [stdout]    |
[INFO] [stdout] 54 |                 .filter(|(k, v)| v.duplicates_number >= 1)
[INFO] [stdout]    |                           ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `k`
[INFO] [stdout]   --> src/main.rs:54:27
[INFO] [stdout]    |
[INFO] [stdout] 54 |                 .filter(|(k, v)| v.duplicates_number >= 1)
[INFO] [stdout]    |                           ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `k`
[INFO] [stdout]   --> src/main.rs:55:29
[INFO] [stdout]    |
[INFO] [stdout] 55 |                 .for_each(|(k, v)| {
[INFO] [stdout]    |                             ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `k`
[INFO] [stdout]   --> src/main.rs:55:29
[INFO] [stdout]    |
[INFO] [stdout] 55 |                 .for_each(|(k, v)| {
[INFO] [stdout]    |                             ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] running `Command { std: "docker" "inspect" "6cb71b6f5c7bceda4d48890194e1d70a24478280c228ed661a7a3e11025690de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6cb71b6f5c7bceda4d48890194e1d70a24478280c228ed661a7a3e11025690de", kill_on_drop: false }`
[INFO] [stdout] 6cb71b6f5c7bceda4d48890194e1d70a24478280c228ed661a7a3e11025690de