[INFO] fetching crate tjh-mqtt 0.2.1...
[INFO] checking tjh-mqtt-0.2.1 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate tjh-mqtt 0.2.1 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate tjh-mqtt 0.2.1 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 crates.io crate tjh-mqtt 0.2.1
[INFO] finished tweaking crates.io crate tjh-mqtt 0.2.1
[INFO] tweaked toml for crates.io crate tjh-mqtt 0.2.1 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 60 packages
[INFO] [stderr]       Adding object v0.32.2 (latest: v0.34.0)
[INFO] [stderr]       Adding rustls v0.21.10 (latest: v0.23.4)
[INFO] [stderr]       Adding rustls-webpki v0.101.7 (latest: v0.102.2)
[INFO] [stderr]       Adding tokio-rustls v0.24.1 (latest: v0.26.0)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[INFO] [stderr]       Adding webpki-roots v0.25.4 (latest: v0.26.1)
[INFO] [stderr]       Adding windows-sys v0.48.0 (latest: v0.52.0)
[INFO] [stderr]       Adding windows-targets v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_aarch64_gnullvm v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_aarch64_msvc v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_i686_gnu v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_i686_msvc v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_gnu v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_gnullvm v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_msvc v0.48.5 (latest: v0.52.4)
[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]  Downloading crates ...
[INFO] [stderr]   Downloaded tokio-test v0.4.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] e28afbec1ab94854ea4d4116297526def7d6357098ad88cfa9dbd9d5908e78f1
[INFO] running `Command { std: "docker" "start" "-a" "e28afbec1ab94854ea4d4116297526def7d6357098ad88cfa9dbd9d5908e78f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e28afbec1ab94854ea4d4116297526def7d6357098ad88cfa9dbd9d5908e78f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e28afbec1ab94854ea4d4116297526def7d6357098ad88cfa9dbd9d5908e78f1", kill_on_drop: false }`
[INFO] [stdout] e28afbec1ab94854ea4d4116297526def7d6357098ad88cfa9dbd9d5908e78f1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] a40a6ae341e36f8cbc93e9536fd853f4bfc53694f2d748f74b9778d6e3764ae4
[INFO] running `Command { std: "docker" "start" "-a" "a40a6ae341e36f8cbc93e9536fd853f4bfc53694f2d748f74b9778d6e3764ae4", kill_on_drop: false }`
[INFO] [stderr]     Checking tjh-mqtt v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated items `MAX` and `get` are never used
[INFO] [stdout]   --> src/misc.rs:95:12
[INFO] [stdout]    |
[INFO] [stdout] 93 | impl WrappingNonZeroU16 {
[INFO] [stdout]    | ----------------------- associated items in this implementation
[INFO] [stdout] 94 |     // pub const MIN: Self = Self(NonZeroU16::MIN);
[INFO] [stdout] 95 |     pub const MAX: Self = Self(NonZeroU16::MAX);
[INFO] [stdout]    |               ^^^
[INFO] [stdout] ...
[INFO] [stdout] 98 |     pub fn get(&self) -> NonZeroU16 {
[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: associated items `MAX` and `get` are never used
[INFO] [stdout]   --> src/misc.rs:95:12
[INFO] [stdout]    |
[INFO] [stdout] 93 | impl WrappingNonZeroU16 {
[INFO] [stdout]    | ----------------------- associated items in this implementation
[INFO] [stdout] 94 |     // pub const MIN: Self = Self(NonZeroU16::MIN);
[INFO] [stdout] 95 |     pub const MAX: Self = Self(NonZeroU16::MAX);
[INFO] [stdout]    |               ^^^
[INFO] [stdout] ...
[INFO] [stdout] 98 |     pub fn get(&self) -> NonZeroU16 {
[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 0.52s
[INFO] running `Command { std: "docker" "inspect" "a40a6ae341e36f8cbc93e9536fd853f4bfc53694f2d748f74b9778d6e3764ae4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a40a6ae341e36f8cbc93e9536fd853f4bfc53694f2d748f74b9778d6e3764ae4", kill_on_drop: false }`
[INFO] [stdout] a40a6ae341e36f8cbc93e9536fd853f4bfc53694f2d748f74b9778d6e3764ae4