[INFO] fetching crate containing 0.1.0-preview...
[INFO] checking containing-0.1.0-preview against try#0611f7de057c584b8771102fde7aed6c70c71d3b for pr-146440
[INFO] extracting crate containing 0.1.0-preview into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate containing 0.1.0-preview
[INFO] finished tweaking crates.io crate containing 0.1.0-preview
[INFO] tweaked toml for crates.io crate containing 0.1.0-preview written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate containing 0.1.0-preview on toolchain 0611f7de057c584b8771102fde7aed6c70c71d3b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate containing 0.1.0-preview 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" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 022014e3cd11211d63392d0884ca3dd5d318140144b914f20a35fcd3528a26e2
[INFO] running `Command { std: "docker" "start" "-a" "022014e3cd11211d63392d0884ca3dd5d318140144b914f20a35fcd3528a26e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "022014e3cd11211d63392d0884ca3dd5d318140144b914f20a35fcd3528a26e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "022014e3cd11211d63392d0884ca3dd5d318140144b914f20a35fcd3528a26e2", kill_on_drop: false }`
[INFO] [stdout] 022014e3cd11211d63392d0884ca3dd5d318140144b914f20a35fcd3528a26e2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 829555d9f31e19d54046e701c2f1515fceffeae8e3012be61c0e2bf45f9e0379
[INFO] running `Command { std: "docker" "start" "-a" "829555d9f31e19d54046e701c2f1515fceffeae8e3012be61c0e2bf45f9e0379", kill_on_drop: false }`
[INFO] [stderr]     Checking containing v0.1.0-preview (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `impl_reserve`
[INFO] [stdout]   --> src/alloc_impls.rs:53:16
[INFO] [stdout]    |
[INFO] [stdout] 53 | pub(crate) use impl_reserve;
[INFO] [stdout]    |                ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `impl_reserve`
[INFO] [stdout]   --> src/alloc_impls.rs:53:16
[INFO] [stdout]    |
[INFO] [stdout] 53 | pub(crate) use impl_reserve;
[INFO] [stdout]    |                ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `Once` is never constructed
[INFO] [stdout]    --> src/iter.rs:218:12
[INFO] [stdout]     |
[INFO] [stdout] 218 | pub struct Once<T>(T);
[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_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `containing` (lib) due to 1 previous error; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: struct `Once` is never constructed
[INFO] [stdout]    --> src/iter.rs:218:12
[INFO] [stdout]     |
[INFO] [stdout] 218 | pub struct Once<T>(T);
[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_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `containing` (lib test) due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "829555d9f31e19d54046e701c2f1515fceffeae8e3012be61c0e2bf45f9e0379", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "829555d9f31e19d54046e701c2f1515fceffeae8e3012be61c0e2bf45f9e0379", kill_on_drop: false }`
[INFO] [stdout] 829555d9f31e19d54046e701c2f1515fceffeae8e3012be61c0e2bf45f9e0379
