[INFO] cloning repository https://github.com/zekefast/tanks
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zekefast/tanks" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzekefast%2Ftanks", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzekefast%2Ftanks'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] aa66e91cec461bf4418209efd812a217c86e93bc
[INFO] checking zekefast/tanks against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzekefast%2Ftanks" "/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/zekefast/tanks 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/zekefast/tanks
[INFO] finished tweaking git repo https://github.com/zekefast/tanks
[INFO] tweaked toml for git repo https://github.com/zekefast/tanks written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/zekefast/tanks 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] 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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 72523f251b1be33b78c44d65bd484c98bfa0ba28644d3fb95699e63561f8fabc
[INFO] running `Command { std: "docker" "start" "-a" "72523f251b1be33b78c44d65bd484c98bfa0ba28644d3fb95699e63561f8fabc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "72523f251b1be33b78c44d65bd484c98bfa0ba28644d3fb95699e63561f8fabc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "72523f251b1be33b78c44d65bd484c98bfa0ba28644d3fb95699e63561f8fabc", kill_on_drop: false }`
[INFO] [stdout] 72523f251b1be33b78c44d65bd484c98bfa0ba28644d3fb95699e63561f8fabc
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 43cda1889243eaec1d0723b255b932afb7fcf3a7020c3331ef582b625bbb24a3
[INFO] running `Command { std: "docker" "start" "-a" "43cda1889243eaec1d0723b255b932afb7fcf3a7020c3331ef582b625bbb24a3", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.69
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling thiserror v1.0.49
[INFO] [stderr]     Checking numtoa v0.1.0
[INFO] [stderr]    Compiling anyhow v1.0.75
[INFO] [stderr]     Checking unicode-segmentation v1.10.1
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling syn v2.0.38
[INFO] [stderr]     Checking termion v2.0.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.49
[INFO] [stderr]     Checking tanks v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant `Generic` is never constructed
[INFO] [stdout]  --> src/error.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub(crate) enum Error {
[INFO] [stdout]   |                 ----- variant in this enum
[INFO] [stdout] 3 |     #[error("Generic {0}")]
[INFO] [stdout] 4 |     Generic(String),
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Generic` is never constructed
[INFO] [stdout]  --> src/error.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub(crate) enum Error {
[INFO] [stdout]   |                 ----- variant in this enum
[INFO] [stdout] 3 |     #[error("Generic {0}")]
[INFO] [stdout] 4 |     Generic(String),
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Result` is never used
[INFO] [stdout]  --> src/prelude.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub(crate) type Result<T> = core::result::Result<T, Error>;
[INFO] [stdout]   |                 ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Result` is never used
[INFO] [stdout]  --> src/prelude.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub(crate) type Result<T> = core::result::Result<T, Error>;
[INFO] [stdout]   |                 ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.14s
[INFO] running `Command { std: "docker" "inspect" "43cda1889243eaec1d0723b255b932afb7fcf3a7020c3331ef582b625bbb24a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43cda1889243eaec1d0723b255b932afb7fcf3a7020c3331ef582b625bbb24a3", kill_on_drop: false }`
[INFO] [stdout] 43cda1889243eaec1d0723b255b932afb7fcf3a7020c3331ef582b625bbb24a3
[INFO] checking zekefast/tanks against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzekefast%2Ftanks" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zekefast/tanks on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/zekefast/tanks
[INFO] finished tweaking git repo https://github.com/zekefast/tanks
[INFO] tweaked toml for git repo https://github.com/zekefast/tanks written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/zekefast/tanks 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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9b54dd44b78adaceaf71a3133c9e45c3499cc9ad7f547496d4864f61a9b21085
[INFO] running `Command { std: "docker" "start" "-a" "9b54dd44b78adaceaf71a3133c9e45c3499cc9ad7f547496d4864f61a9b21085", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9b54dd44b78adaceaf71a3133c9e45c3499cc9ad7f547496d4864f61a9b21085", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9b54dd44b78adaceaf71a3133c9e45c3499cc9ad7f547496d4864f61a9b21085", kill_on_drop: false }`
[INFO] [stdout] 9b54dd44b78adaceaf71a3133c9e45c3499cc9ad7f547496d4864f61a9b21085
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b8a2aefc2862ea3241e6c7fd313abfc4cb9a4e8a26b98222b57457f151161787
[INFO] running `Command { std: "docker" "start" "-a" "b8a2aefc2862ea3241e6c7fd313abfc4cb9a4e8a26b98222b57457f151161787", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.69
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling thiserror v1.0.49
[INFO] [stderr]     Checking numtoa v0.1.0
[INFO] [stderr]    Compiling anyhow v1.0.75
[INFO] [stderr]     Checking unicode-segmentation v1.10.1
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]     Checking termion v2.0.1
[INFO] [stderr]    Compiling syn v2.0.38
[INFO] [stderr]    Compiling thiserror-impl v1.0.49
[INFO] [stderr]     Checking tanks v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant `Generic` is never constructed
[INFO] [stdout]  --> src/error.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub(crate) enum Error {
[INFO] [stdout]   |                 ----- variant in this enum
[INFO] [stdout] 3 |     #[error("Generic {0}")]
[INFO] [stdout] 4 |     Generic(String),
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Result` is never used
[INFO] [stdout]  --> src/prelude.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub(crate) type Result<T> = core::result::Result<T, Error>;
[INFO] [stdout]   |                 ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Generic` is never constructed
[INFO] [stdout]  --> src/error.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub(crate) enum Error {
[INFO] [stdout]   |                 ----- variant in this enum
[INFO] [stdout] 3 |     #[error("Generic {0}")]
[INFO] [stdout] 4 |     Generic(String),
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Result` is never used
[INFO] [stdout]  --> src/prelude.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub(crate) type Result<T> = core::result::Result<T, Error>;
[INFO] [stdout]   |                 ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.56s
[INFO] running `Command { std: "docker" "inspect" "b8a2aefc2862ea3241e6c7fd313abfc4cb9a4e8a26b98222b57457f151161787", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8a2aefc2862ea3241e6c7fd313abfc4cb9a4e8a26b98222b57457f151161787", kill_on_drop: false }`
[INFO] [stdout] b8a2aefc2862ea3241e6c7fd313abfc4cb9a4e8a26b98222b57457f151161787