[INFO] cloning repository https://github.com/aoyama-val/rust-samegame
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/aoyama-val/rust-samegame" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faoyama-val%2Frust-samegame", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faoyama-val%2Frust-samegame'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c90abb39839a8a58653738c5e779a6a513bd8ba2
[INFO] checking aoyama-val/rust-samegame against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faoyama-val%2Frust-samegame" "/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/aoyama-val/rust-samegame on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/aoyama-val/rust-samegame
[INFO] finished tweaking git repo https://github.com/aoyama-val/rust-samegame
[INFO] tweaked toml for git repo https://github.com/aoyama-val/rust-samegame written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/aoyama-val/rust-samegame 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "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-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f2b250437e5b8e841dbf55ee61a92fd92870478802e68341a6b961986406b4cd
[INFO] running `Command { std: "docker" "start" "-a" "f2b250437e5b8e841dbf55ee61a92fd92870478802e68341a6b961986406b4cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f2b250437e5b8e841dbf55ee61a92fd92870478802e68341a6b961986406b4cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2b250437e5b8e841dbf55ee61a92fd92870478802e68341a6b961986406b4cd", kill_on_drop: false }`
[INFO] [stdout] f2b250437e5b8e841dbf55ee61a92fd92870478802e68341a6b961986406b4cd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bb24ca321e9c82de4224e5bee22f96ddb5f660002584a741eea8a1e0c325e2e6
[INFO] running `Command { std: "docker" "start" "-a" "bb24ca321e9c82de4224e5bee22f96ddb5f660002584a741eea8a1e0c325e2e6", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.152
[INFO] [stderr]    Compiling version-compare v0.1.1
[INFO] [stderr]    Compiling sdl2 v0.36.0
[INFO] [stderr]    Compiling sdl2-sys v0.36.0
[INFO] [stderr]     Checking getrandom v0.2.12
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking rust-samegame v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `component_id`
[INFO] [stdout]    --> src/model.rs:309:14
[INFO] [stdout]     |
[INFO] [stdout] 309 |         for (component_id, connected_count) in &self.connected_counts {
[INFO] [stdout]     |              ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_component_id`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `component_id`
[INFO] [stdout]    --> src/model.rs:309:14
[INFO] [stdout]     |
[INFO] [stdout] 309 |         for (component_id, connected_count) in &self.connected_counts {
[INFO] [stdout]     |              ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_component_id`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.52s
[INFO] running `Command { std: "docker" "inspect" "bb24ca321e9c82de4224e5bee22f96ddb5f660002584a741eea8a1e0c325e2e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb24ca321e9c82de4224e5bee22f96ddb5f660002584a741eea8a1e0c325e2e6", kill_on_drop: false }`
[INFO] [stdout] bb24ca321e9c82de4224e5bee22f96ddb5f660002584a741eea8a1e0c325e2e6