[INFO] cloning repository https://github.com/Qi-Zhan/FlashFill
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Qi-Zhan/FlashFill" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FQi-Zhan%2FFlashFill", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FQi-Zhan%2FFlashFill'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2240540b2a45906fe86bd593d674bcbd175fa676
[INFO] checking Qi-Zhan/FlashFill/2240540b2a45906fe86bd593d674bcbd175fa676 against master#f167efad2f51088d86180ee89177b3d7c9e7c2f5 for pr-129543
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FQi-Zhan%2FFlashFill" "/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/Qi-Zhan/FlashFill on toolchain f167efad2f51088d86180ee89177b3d7c9e7c2f5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Qi-Zhan/FlashFill
[INFO] finished tweaking git repo https://github.com/Qi-Zhan/FlashFill
[INFO] tweaked toml for git repo https://github.com/Qi-Zhan/FlashFill written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Qi-Zhan/FlashFill 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" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1b12c6e7b741d73b85c1883460ee89d0c887f26717a9c371fe1752ff9d4fc406
[INFO] running `Command { std: "docker" "start" "-a" "1b12c6e7b741d73b85c1883460ee89d0c887f26717a9c371fe1752ff9d4fc406", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1b12c6e7b741d73b85c1883460ee89d0c887f26717a9c371fe1752ff9d4fc406", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b12c6e7b741d73b85c1883460ee89d0c887f26717a9c371fe1752ff9d4fc406", kill_on_drop: false }`
[INFO] [stdout] 1b12c6e7b741d73b85c1883460ee89d0c887f26717a9c371fe1752ff9d4fc406
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 613d6b135570251c16eb8dedf4208870f98878555aeb4c9472df54ef04f4550e
[INFO] running `Command { std: "docker" "start" "-a" "613d6b135570251c16eb8dedf4208870f98878555aeb4c9472df54ef04f4550e", kill_on_drop: false }`
[INFO] [stderr]     Checking either v1.10.0
[INFO] [stderr]     Checking itertools v0.12.1
[INFO] [stderr]     Checking flashfill v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `nodes` is never read
[INFO] [stdout]   --> src/data_structure.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub struct Dag {
[INFO] [stdout]    |            --- field in this struct
[INFO] [stdout] 38 |     pub nodes: HashSet<Node>,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Dag` has derived impls for the traits `Clone` and `Debug`, 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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `nodes` is never read
[INFO] [stdout]   --> src/data_structure.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub struct Dag {
[INFO] [stdout]    |            --- field in this struct
[INFO] [stdout] 38 |     pub nodes: HashSet<Node>,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Dag` has derived impls for the traits `Clone` and `Debug`, 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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.92s
[INFO] running `Command { std: "docker" "inspect" "613d6b135570251c16eb8dedf4208870f98878555aeb4c9472df54ef04f4550e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "613d6b135570251c16eb8dedf4208870f98878555aeb4c9472df54ef04f4550e", kill_on_drop: false }`
[INFO] [stdout] 613d6b135570251c16eb8dedf4208870f98878555aeb4c9472df54ef04f4550e