[INFO] cloning repository https://github.com/samgwise/osc-gpio-bridge
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/samgwise/osc-gpio-bridge" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsamgwise%2Fosc-gpio-bridge", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsamgwise%2Fosc-gpio-bridge'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3f2dff538543c40407c0c2c7a8d695057850a77f
[INFO] checking samgwise/osc-gpio-bridge against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsamgwise%2Fosc-gpio-bridge" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/samgwise/osc-gpio-bridge 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/samgwise/osc-gpio-bridge
[INFO] finished tweaking git repo https://github.com/samgwise/osc-gpio-bridge
[INFO] tweaked toml for git repo https://github.com/samgwise/osc-gpio-bridge written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/samgwise/osc-gpio-bridge 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 num-integer v0.1.36
[INFO] [stderr]   Downloaded serde v1.0.37
[INFO] [stderr]   Downloaded quick-error v1.2.1
[INFO] [stderr]   Downloaded serde_derive v1.0.37
[INFO] [stderr]   Downloaded rppal v0.4.0
[INFO] [stderr]   Downloaded num-iter v0.1.35
[INFO] [stderr]   Downloaded serde_derive_internals v0.23.0
[INFO] [stderr]   Downloaded serde_yaml v0.8.4
[INFO] [stderr]   Downloaded rosc v0.1.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 71f09a12aab5f65bbb2fe4dedac4eb131e54027d5f4532d102c85f695962e59e
[INFO] running `Command { std: "docker" "start" "-a" "71f09a12aab5f65bbb2fe4dedac4eb131e54027d5f4532d102c85f695962e59e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "71f09a12aab5f65bbb2fe4dedac4eb131e54027d5f4532d102c85f695962e59e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71f09a12aab5f65bbb2fe4dedac4eb131e54027d5f4532d102c85f695962e59e", kill_on_drop: false }`
[INFO] [stdout] 71f09a12aab5f65bbb2fe4dedac4eb131e54027d5f4532d102c85f695962e59e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 88bc18da8aa59a9fffca8fd9b430555f0abd1fecd5484ba5374ab3beb85fbea0
[INFO] running `Command { std: "docker" "start" "-a" "88bc18da8aa59a9fffca8fd9b430555f0abd1fecd5484ba5374ab3beb85fbea0", kill_on_drop: false }`
[INFO] [stderr]     Checking num-traits v0.2.2
[INFO] [stderr]     Checking linked-hash-map v0.5.4
[INFO] [stderr]     Checking libc v0.2.40
[INFO] [stderr]     Checking dtoa v0.4.8
[INFO] [stderr]    Compiling proc-macro2 v0.3.6
[INFO] [stderr]     Checking serde v1.0.37
[INFO] [stderr]     Checking quick-error v1.2.1
[INFO] [stderr]     Checking byteorder v0.5.3
[INFO] [stderr]     Checking rosc v0.1.5
[INFO] [stderr]     Checking yaml-rust v0.4.5
[INFO] [stderr]    Compiling quote v0.5.1
[INFO] [stderr]    Compiling syn v0.13.1
[INFO] [stderr]     Checking num-integer v0.1.36
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking enum_primitive v0.1.1
[INFO] [stderr]     Checking num-iter v0.1.35
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking rppal v0.4.0
[INFO] [stderr]    Compiling serde_derive_internals v0.23.0
[INFO] [stderr]    Compiling serde_derive v1.0.37
[INFO] [stderr]     Checking serde_yaml v0.8.4
[INFO] [stderr]     Checking osc-gpio-bridge v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `serde_yaml` is imported redundantly
[INFO] [stdout]  --> src/config/mod.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use serde_yaml;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/main.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | extern crate serde_yaml;
[INFO] [stdout]   | ------------------------ the item `serde_yaml` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde_yaml` is imported redundantly
[INFO] [stdout]  --> src/config/mod.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use serde_yaml;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/main.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | extern crate serde_yaml;
[INFO] [stdout]   | ------------------------ the item `serde_yaml` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` 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 6.93s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: syn v0.13.1
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 3`
[INFO] running `Command { std: "docker" "inspect" "88bc18da8aa59a9fffca8fd9b430555f0abd1fecd5484ba5374ab3beb85fbea0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "88bc18da8aa59a9fffca8fd9b430555f0abd1fecd5484ba5374ab3beb85fbea0", kill_on_drop: false }`
[INFO] [stdout] 88bc18da8aa59a9fffca8fd9b430555f0abd1fecd5484ba5374ab3beb85fbea0