[INFO] cloning repository https://github.com/czeng2/gg
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/czeng2/gg" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fczeng2%2Fgg", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fczeng2%2Fgg'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 419ffe9823b746add10cb95a2512b46e74b09a04
[INFO] checking czeng2/gg against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fczeng2%2Fgg" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/czeng2/gg 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/czeng2/gg
[INFO] finished tweaking git repo https://github.com/czeng2/gg
[INFO] tweaked toml for git repo https://github.com/czeng2/gg written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/czeng2/gg 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]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tokio-context v0.1.3
[INFO] [stderr]   Downloaded maelstrom-node v0.1.6
[INFO] [stderr]   Downloaded simple-error v0.3.0
[INFO] [stderr]   Downloaded tokio-retry v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] e4367d9ce8820a6f215e8f27dd3a5426e5344743a58f7fddbe9ccef83c8c7905
[INFO] running `Command { std: "docker" "start" "-a" "e4367d9ce8820a6f215e8f27dd3a5426e5344743a58f7fddbe9ccef83c8c7905", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e4367d9ce8820a6f215e8f27dd3a5426e5344743a58f7fddbe9ccef83c8c7905", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4367d9ce8820a6f215e8f27dd3a5426e5344743a58f7fddbe9ccef83c8c7905", kill_on_drop: false }`
[INFO] [stdout] e4367d9ce8820a6f215e8f27dd3a5426e5344743a58f7fddbe9ccef83c8c7905
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 065f1eead1d2884786ca3f2829000221debb43b9c60ad3c3dc6d2d501d846e00
[INFO] running `Command { std: "docker" "start" "-a" "065f1eead1d2884786ca3f2829000221debb43b9c60ad3c3dc6d2d501d846e00", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.146
[INFO] [stderr]    Compiling proc-macro2 v1.0.60
[INFO] [stderr]    Compiling unicode-ident v1.0.9
[INFO] [stderr]    Compiling quote v1.0.28
[INFO] [stderr]    Compiling futures-core v0.3.28
[INFO] [stderr]     Checking pin-project-lite v0.2.9
[INFO] [stderr]     Checking smallvec v1.10.0
[INFO] [stderr]     Checking futures-sink v0.3.28
[INFO] [stderr]    Compiling io-lifetimes v1.0.11
[INFO] [stderr]    Compiling tokio v1.28.2
[INFO] [stderr]    Compiling rustix v0.37.20
[INFO] [stderr]    Compiling serde v1.0.164
[INFO] [stderr]     Checking linux-raw-sys v0.3.8
[INFO] [stderr]    Compiling async-trait v0.1.68
[INFO] [stderr]    Compiling serde_json v1.0.96
[INFO] [stderr]     Checking regex-syntax v0.7.2
[INFO] [stderr]     Checking ryu v1.0.13
[INFO] [stderr]     Checking itoa v1.0.6
[INFO] [stderr]     Checking simple-error v0.3.0
[INFO] [stderr]     Checking futures-channel v0.3.28
[INFO] [stderr]     Checking regex v1.8.4
[INFO] [stderr]    Compiling syn v2.0.18
[INFO] [stderr]     Checking parking_lot_core v0.9.8
[INFO] [stderr]     Checking num_cpus v1.15.0
[INFO] [stderr]     Checking mio v0.8.8
[INFO] [stderr]     Checking socket2 v0.4.9
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]     Checking getrandom v0.2.10
[INFO] [stderr]     Checking parking_lot v0.12.1
[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 is-terminal v0.4.7
[INFO] [stderr]     Checking env_logger v0.10.0
[INFO] [stderr]    Compiling tokio-macros v2.1.0
[INFO] [stderr]    Compiling futures-macro v0.3.28
[INFO] [stderr]    Compiling serde_derive v1.0.164
[INFO] [stderr]    Compiling pin-project-internal v1.1.0
[INFO] [stderr]     Checking futures-util v0.3.28
[INFO] [stderr]     Checking pin-project v1.1.0
[INFO] [stderr]     Checking futures-executor v0.3.28
[INFO] [stderr]     Checking futures v0.3.28
[INFO] [stderr]     Checking tokio-context v0.1.3
[INFO] [stderr]     Checking tokio-util v0.7.8
[INFO] [stderr]     Checking tokio-retry v0.3.0
[INFO] [stderr]     Checking maelstrom-node v0.1.6
[INFO] [stderr]     Checking gg_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `uncommitted_state` is never read
[INFO] [stdout]   --> src/bin/transactions_2.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct HandlerState {
[INFO] [stdout]    |        ------------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 33 |     uncommitted_state: HashMap<i64, i64>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `uncommitted_state` is never read
[INFO] [stdout]   --> src/bin/transactions_2.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct HandlerState {
[INFO] [stdout]    |        ------------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 33 |     uncommitted_state: HashMap<i64, i64>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 18.43s
[INFO] running `Command { std: "docker" "inspect" "065f1eead1d2884786ca3f2829000221debb43b9c60ad3c3dc6d2d501d846e00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "065f1eead1d2884786ca3f2829000221debb43b9c60ad3c3dc6d2d501d846e00", kill_on_drop: false }`
[INFO] [stdout] 065f1eead1d2884786ca3f2829000221debb43b9c60ad3c3dc6d2d501d846e00
[INFO] checking czeng2/gg against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fczeng2%2Fgg" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/czeng2/gg on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/czeng2/gg
[INFO] finished tweaking git repo https://github.com/czeng2/gg
[INFO] tweaked toml for git repo https://github.com/czeng2/gg written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/czeng2/gg 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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1ff0e90e49ecbc9b20d6532daf96bc584cb8bbf3d70df4773f41e95ac385bdb6
[INFO] running `Command { std: "docker" "start" "-a" "1ff0e90e49ecbc9b20d6532daf96bc584cb8bbf3d70df4773f41e95ac385bdb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1ff0e90e49ecbc9b20d6532daf96bc584cb8bbf3d70df4773f41e95ac385bdb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ff0e90e49ecbc9b20d6532daf96bc584cb8bbf3d70df4773f41e95ac385bdb6", kill_on_drop: false }`
[INFO] [stdout] 1ff0e90e49ecbc9b20d6532daf96bc584cb8bbf3d70df4773f41e95ac385bdb6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3c6cfe832d3a436d113b8ccb3e01a355c51d601d59a531f3e0c4c7f1ad3e2c5f
[INFO] running `Command { std: "docker" "start" "-a" "3c6cfe832d3a436d113b8ccb3e01a355c51d601d59a531f3e0c4c7f1ad3e2c5f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.146
[INFO] [stderr]    Compiling proc-macro2 v1.0.60
[INFO] [stderr]    Compiling unicode-ident v1.0.9
[INFO] [stderr]    Compiling quote v1.0.28
[INFO] [stderr]    Compiling futures-core v0.3.28
[INFO] [stderr]     Checking pin-project-lite v0.2.9
[INFO] [stderr]     Checking smallvec v1.10.0
[INFO] [stderr]     Checking futures-sink v0.3.28
[INFO] [stderr]    Compiling io-lifetimes v1.0.11
[INFO] [stderr]    Compiling tokio v1.28.2
[INFO] [stderr]    Compiling rustix v0.37.20
[INFO] [stderr]     Checking linux-raw-sys v0.3.8
[INFO] [stderr]    Compiling serde v1.0.164
[INFO] [stderr]     Checking regex-syntax v0.7.2
[INFO] [stderr]    Compiling serde_json v1.0.96
[INFO] [stderr]    Compiling async-trait v0.1.68
[INFO] [stderr]     Checking ryu v1.0.13
[INFO] [stderr]     Checking itoa v1.0.6
[INFO] [stderr]     Checking simple-error v0.3.0
[INFO] [stderr]     Checking futures-channel v0.3.28
[INFO] [stderr]     Checking regex v1.8.4
[INFO] [stderr]    Compiling syn v2.0.18
[INFO] [stderr]     Checking parking_lot_core v0.9.8
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]     Checking num_cpus v1.15.0
[INFO] [stderr]     Checking socket2 v0.4.9
[INFO] [stderr]     Checking mio v0.8.8
[INFO] [stderr]     Checking getrandom v0.2.10
[INFO] [stderr]     Checking parking_lot v0.12.1
[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 is-terminal v0.4.7
[INFO] [stderr]     Checking env_logger v0.10.0
[INFO] [stderr]    Compiling tokio-macros v2.1.0
[INFO] [stderr]    Compiling futures-macro v0.3.28
[INFO] [stderr]    Compiling serde_derive v1.0.164
[INFO] [stderr]    Compiling pin-project-internal v1.1.0
[INFO] [stderr]     Checking futures-util v0.3.28
[INFO] [stderr]     Checking pin-project v1.1.0
[INFO] [stderr]     Checking futures-executor v0.3.28
[INFO] [stderr]     Checking futures v0.3.28
[INFO] [stderr]     Checking tokio-context v0.1.3
[INFO] [stderr]     Checking tokio-util v0.7.8
[INFO] [stderr]     Checking tokio-retry v0.3.0
[INFO] [stderr]     Checking maelstrom-node v0.1.6
[INFO] [stderr]     Checking gg_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `uncommitted_state` is never read
[INFO] [stdout]   --> src/bin/transactions_2.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct HandlerState {
[INFO] [stdout]    |        ------------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 33 |     uncommitted_state: HashMap<i64, i64>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[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 `uncommitted_state` is never read
[INFO] [stdout]   --> src/bin/transactions_2.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct HandlerState {
[INFO] [stdout]    |        ------------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 33 |     uncommitted_state: HashMap<i64, i64>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[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 21.64s
[INFO] running `Command { std: "docker" "inspect" "3c6cfe832d3a436d113b8ccb3e01a355c51d601d59a531f3e0c4c7f1ad3e2c5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c6cfe832d3a436d113b8ccb3e01a355c51d601d59a531f3e0c4c7f1ad3e2c5f", kill_on_drop: false }`
[INFO] [stdout] 3c6cfe832d3a436d113b8ccb3e01a355c51d601d59a531f3e0c4c7f1ad3e2c5f