[INFO] fetching crate is31fl3731 1.0.1...
[INFO] checking is31fl3731-1.0.1 against try#93086cfebfccb79083c59d0d3b2052944bba643c for pr-146440-1
[INFO] extracting crate is31fl3731 1.0.1 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate is31fl3731 1.0.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate is31fl3731 1.0.1
[INFO] tweaked toml for crates.io crate is31fl3731 1.0.1 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate is31fl3731 1.0.1 on toolchain 93086cfebfccb79083c59d0d3b2052944bba643c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate is31fl3731 1.0.1 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" "+93086cfebfccb79083c59d0d3b2052944bba643c" "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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f6a63872f0b62b1f9c8ac26f3b538231a919615ed81d353b3067558c7531722f
[INFO] running `Command { std: "docker" "start" "-a" "f6a63872f0b62b1f9c8ac26f3b538231a919615ed81d353b3067558c7531722f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f6a63872f0b62b1f9c8ac26f3b538231a919615ed81d353b3067558c7531722f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f6a63872f0b62b1f9c8ac26f3b538231a919615ed81d353b3067558c7531722f", kill_on_drop: false }`
[INFO] [stdout] f6a63872f0b62b1f9c8ac26f3b538231a919615ed81d353b3067558c7531722f
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a8e114861c49579a6fbe6df1bb2c97acdfa4b0066865b639ce0889a4b3fe3a43
[INFO] running `Command { std: "docker" "start" "-a" "a8e114861c49579a6fbe6df1bb2c97acdfa4b0066865b639ce0889a4b3fe3a43", kill_on_drop: false }`
[INFO] [stderr]     Checking nb v1.0.0
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling libc v0.2.121
[INFO] [stderr]     Checking spin_sleep v1.1.0
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]     Checking embedded-hal v1.0.0-alpha.5
[INFO] [stderr]     Checking embedded-hal v0.2.6
[INFO] [stderr]     Checking is31fl3731 v1.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: struct `IS31FL3731` is never constructed
[INFO] [stdout]   --> src/lib.rs:52:12
[INFO] [stdout]    |
[INFO] [stdout] 52 | pub struct IS31FL3731<I2C> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]    = note: `#[deny(unused_unconstructable_pub_structs)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `is31fl3731` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "a8e114861c49579a6fbe6df1bb2c97acdfa4b0066865b639ce0889a4b3fe3a43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a8e114861c49579a6fbe6df1bb2c97acdfa4b0066865b639ce0889a4b3fe3a43", kill_on_drop: false }`
[INFO] [stdout] a8e114861c49579a6fbe6df1bb2c97acdfa4b0066865b639ce0889a4b3fe3a43
