[INFO] cloning repository https://github.com/emanuele-em/pipe_rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/emanuele-em/pipe_rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femanuele-em%2Fpipe_rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femanuele-em%2Fpipe_rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a22352ceacff208c0ecb246f6e66e609b57a711c
[INFO] checking emanuele-em/pipe_rs against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femanuele-em%2Fpipe_rs" "/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/emanuele-em/pipe_rs 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/emanuele-em/pipe_rs
[INFO] finished tweaking git repo https://github.com/emanuele-em/pipe_rs
[INFO] tweaked toml for git repo https://github.com/emanuele-em/pipe_rs written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/emanuele-em/pipe_rs 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]      Locking 66 packages
[INFO] [stderr]       Adding aho-corasick v1.1.3
[INFO] [stderr]       Adding anyhow v1.0.81
[INFO] [stderr]       Adding async-trait v0.1.79
[INFO] [stderr]     Updating bincode v1.3.3 -> v2.0.0-rc.3
[INFO] [stderr]       Adding bincode_derive v2.0.0-rc.3
[INFO] [stderr]       Adding bitflags v2.5.0
[INFO] [stderr]       Adding bytes v1.6.0
[INFO] [stderr]       Adding either v1.10.0
[INFO] [stderr]       Adding equivalent v1.0.1
[INFO] [stderr]       Adding errno v0.3.8
[INFO] [stderr]       Adding fastrand v2.0.2
[INFO] [stderr]       Adding fixedbitset v0.4.2 (latest: v0.5.6)
[INFO] [stderr]       Adding hashbrown v0.14.3
[INFO] [stderr]       Adding heck v0.4.1 (latest: v0.5.0)
[INFO] [stderr]       Adding hermit-abi v0.3.9
[INFO] [stderr]       Adding home v0.5.9
[INFO] [stderr]       Adding indexmap v2.2.6
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.12.1)
[INFO] [stderr]       Adding lazy_static v1.4.0
[INFO] [stderr]     Updating libc v0.2.145 -> v0.2.153
[INFO] [stderr]       Adding linux-raw-sys v0.4.13 (latest: v0.6.4)
[INFO] [stderr]       Adding lock_api v0.4.11
[INFO] [stderr]       Adding log v0.4.21
[INFO] [stderr]       Adding memchr v2.7.2
[INFO] [stderr]       Adding mio v0.8.11
[INFO] [stderr]       Adding multimap v0.8.3 (latest: v0.10.0)
[INFO] [stderr]       Adding num_cpus v1.16.0
[INFO] [stderr]       Adding once_cell v1.19.0
[INFO] [stderr]       Adding parking_lot v0.12.1
[INFO] [stderr]       Adding parking_lot_core v0.9.9
[INFO] [stderr]       Adding petgraph v0.6.4
[INFO] [stderr]       Adding prettyplease v0.1.25 (latest: v0.2.17)
[INFO] [stderr]     Updating proc-macro2 v1.0.59 -> v1.0.79
[INFO] [stderr]       Adding prost v0.11.9 (latest: v0.12.4)
[INFO] [stderr]       Adding prost-build v0.11.9 (latest: v0.12.4)
[INFO] [stderr]       Adding prost-derive v0.11.9 (latest: v0.12.4)
[INFO] [stderr]       Adding prost-types v0.11.9 (latest: v0.12.4)
[INFO] [stderr]     Updating quote v1.0.28 -> v1.0.35
[INFO] [stderr]       Adding redox_syscall v0.4.1 (latest: v0.5.1)
[INFO] [stderr]       Adding regex v1.10.4
[INFO] [stderr]       Adding regex-automata v0.4.6
[INFO] [stderr]       Adding regex-syntax v0.8.3
[INFO] [stderr]       Adding rustix v0.38.32
[INFO] [stderr]       Adding scopeguard v1.2.0
[INFO] [stderr]       Adding signal-hook-registry v1.4.1
[INFO] [stderr]       Adding smallvec v1.13.2
[INFO] [stderr]       Adding socket2 v0.4.10 (latest: v0.5.6)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding syn v2.0.58
[INFO] [stderr]       Adding tempfile v3.10.1
[INFO] [stderr]       Adding tokio-macros v2.1.0 (latest: v2.2.0)
[INFO] [stderr]       Adding virtue v0.0.13 (latest: v0.0.16)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[INFO] [stderr]       Adding which v4.4.2 (latest: v6.0.1)
[INFO] [stderr]       Adding winapi v0.3.9
[INFO] [stderr]       Adding winapi-i686-pc-windows-gnu v0.4.0
[INFO] [stderr]       Adding winapi-x86_64-pc-windows-gnu v0.4.0
[INFO] [stderr]       Adding windows-sys v0.52.0
[INFO] [stderr]       Adding windows-targets v0.52.4
[INFO] [stderr]       Adding windows_aarch64_gnullvm v0.52.4
[INFO] [stderr]       Adding windows_aarch64_msvc v0.52.4
[INFO] [stderr]       Adding windows_i686_gnu v0.52.4
[INFO] [stderr]       Adding windows_i686_msvc v0.52.4
[INFO] [stderr]       Adding windows_x86_64_gnu v0.52.4
[INFO] [stderr]       Adding windows_x86_64_gnullvm v0.52.4
[INFO] [stderr]       Adding windows_x86_64_msvc v0.52.4
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ioctl-sys v0.6.0
[INFO] [stderr]   Downloaded tun v0.5.5
[INFO] [stderr]   Downloaded serde v1.0.163
[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] 1d05bac5d336e2de0f2ea952fe3da565aae322cb3d293c503e8beb515f4da111
[INFO] running `Command { std: "docker" "start" "-a" "1d05bac5d336e2de0f2ea952fe3da565aae322cb3d293c503e8beb515f4da111", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1d05bac5d336e2de0f2ea952fe3da565aae322cb3d293c503e8beb515f4da111", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d05bac5d336e2de0f2ea952fe3da565aae322cb3d293c503e8beb515f4da111", kill_on_drop: false }`
[INFO] [stdout] 1d05bac5d336e2de0f2ea952fe3da565aae322cb3d293c503e8beb515f4da111
[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] e207a99d299a7d53b278f6a2ec6427a68b899efebb5a5514dbb7eab109422adf
[INFO] running `Command { std: "docker" "start" "-a" "e207a99d299a7d53b278f6a2ec6427a68b899efebb5a5514dbb7eab109422adf", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-ident v1.0.9
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling rustix v0.38.32
[INFO] [stderr]    Compiling either v1.10.0
[INFO] [stderr]    Compiling bitflags v2.5.0
[INFO] [stderr]    Compiling linux-raw-sys v0.4.13
[INFO] [stderr]    Compiling bytes v1.6.0
[INFO] [stderr]    Compiling hashbrown v0.14.3
[INFO] [stderr]    Compiling equivalent v1.0.1
[INFO] [stderr]    Compiling prettyplease v0.1.25
[INFO] [stderr]    Compiling regex-syntax v0.8.3
[INFO] [stderr]    Compiling home v0.5.9
[INFO] [stderr]    Compiling anyhow v1.0.81
[INFO] [stderr]    Compiling fastrand v2.0.2
[INFO] [stderr]    Compiling fixedbitset v0.4.2
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]    Compiling memoffset v0.7.1
[INFO] [stderr]    Compiling itertools v0.10.5
[INFO] [stderr]    Compiling thiserror v1.0.40
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]     Checking smallvec v1.13.2
[INFO] [stderr]    Compiling multimap v0.8.3
[INFO] [stderr]    Compiling tokio v1.28.2
[INFO] [stderr]    Compiling async-trait v0.1.79
[INFO] [stderr]    Compiling virtue v0.0.13
[INFO] [stderr]     Checking ioctl-sys v0.6.0
[INFO] [stderr]    Compiling indexmap v2.2.6
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]    Compiling petgraph v0.6.4
[INFO] [stderr]    Compiling bincode_derive v2.0.0-rc.3
[INFO] [stderr]    Compiling regex-automata v0.4.6
[INFO] [stderr]     Checking parking_lot_core v0.9.9
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]     Checking socket2 v0.4.10
[INFO] [stderr]     Checking mio v0.8.11
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking nix v0.26.2
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking bincode v2.0.0-rc.3
[INFO] [stderr]     Checking tempfile v3.10.1
[INFO] [stderr]    Compiling which v4.4.2
[INFO] [stderr]    Compiling regex v1.10.4
[INFO] [stderr]    Compiling thiserror-impl v1.0.40
[INFO] [stderr]    Compiling tokio-macros v2.1.0
[INFO] [stderr]    Compiling prost-derive v0.11.9
[INFO] [stderr]     Checking tun v0.5.5
[INFO] [stderr]    Compiling prost v0.11.9
[INFO] [stderr]    Compiling prost-types v0.11.9
[INFO] [stderr]    Compiling prost-build v0.11.9
[INFO] [stderr]    Compiling pipe_rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `tx`
[INFO] [stdout]   --> src/main.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |     let tx = OpenOptions::new().open_sender(fifo_path).unwrap();
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_tx`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tx`
[INFO] [stdout]   --> src/main.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |     let tx = OpenOptions::new().open_sender(fifo_path).unwrap();
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_tx`
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 17.19s
[INFO] running `Command { std: "docker" "inspect" "e207a99d299a7d53b278f6a2ec6427a68b899efebb5a5514dbb7eab109422adf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e207a99d299a7d53b278f6a2ec6427a68b899efebb5a5514dbb7eab109422adf", kill_on_drop: false }`
[INFO] [stdout] e207a99d299a7d53b278f6a2ec6427a68b899efebb5a5514dbb7eab109422adf