[INFO] crate construct 0.0.3 is already in cache
[INFO] testing construct-0.0.3 against beta-2019-09-28 for beta-1.39-1
[INFO] extracting crate construct 0.0.3 into work/builds/worker-4/source
[INFO] validating manifest of crates.io crate construct 0.0.3 on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate construct 0.0.3
[INFO] finished tweaking crates.io crate construct 0.0.3
[INFO] tweaked toml for crates.io crate construct 0.0.3 written to work/builds/worker-4/source/Cargo.toml
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] c8ebbb8d930a424b26350824744a3ceb4a7da4c5cb4e5e4686c76de3f54e65a5
[INFO] running `"docker" "start" "-a" "c8ebbb8d930a424b26350824744a3ceb4a7da4c5cb4e5e4686c76de3f54e65a5"`
[INFO] [stderr]    Compiling construct v0.0.3 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unknown lint: `unstable`
[INFO] [stderr]  --> src/lib.rs:1:10
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![allow(unstable)]
[INFO] [stderr]   |          ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unknown_lints)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0392]: parameter `T` is never used
[INFO] [stderr]  --> src/lib.rs:3:21
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub struct ReserveN<T> {
[INFO] [stderr]   |                     ^ unused parameter
[INFO] [stderr]   |
[INFO] [stderr]   = help: consider removing `T` or using a marker such as `std::marker::PhantomData`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0392`.
[INFO] [stderr] error: could not compile `construct`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "c8ebbb8d930a424b26350824744a3ceb4a7da4c5cb4e5e4686c76de3f54e65a5"`
[INFO] running `"docker" "rm" "-f" "c8ebbb8d930a424b26350824744a3ceb4a7da4c5cb4e5e4686c76de3f54e65a5"`
[INFO] [stdout] c8ebbb8d930a424b26350824744a3ceb4a7da4c5cb4e5e4686c76de3f54e65a5