[INFO] fetching crate yagen 0.3.1...
[INFO] checking yagen-0.3.1 against try#0611f7de057c584b8771102fde7aed6c70c71d3b for pr-146440
[INFO] extracting crate yagen 0.3.1 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate yagen 0.3.1
[INFO] finished tweaking crates.io crate yagen 0.3.1
[INFO] tweaked toml for crates.io crate yagen 0.3.1 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate yagen 0.3.1 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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-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" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 881aa60d1076029275e717e42b05af885dd43316413451c00cd6027cc6581bba
[INFO] running `Command { std: "docker" "start" "-a" "881aa60d1076029275e717e42b05af885dd43316413451c00cd6027cc6581bba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "881aa60d1076029275e717e42b05af885dd43316413451c00cd6027cc6581bba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "881aa60d1076029275e717e42b05af885dd43316413451c00cd6027cc6581bba", kill_on_drop: false }`
[INFO] [stdout] 881aa60d1076029275e717e42b05af885dd43316413451c00cd6027cc6581bba
[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" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 38f04681fe1ffbc5c805a811bb50878c2e1436d037770e9b60b89d43569fd13b
[INFO] running `Command { std: "docker" "start" "-a" "38f04681fe1ffbc5c805a811bb50878c2e1436d037770e9b60b89d43569fd13b", kill_on_drop: false }`
[INFO] [stderr]     Checking yagen v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: struct `Compose` is never constructed
[INFO] [stdout]  --> src/compose.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Compose<F0, F1>(F0, F1);
[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] [stdout] error: struct `IteratorGenerator` is never constructed
[INFO] [stdout]  --> src/iter.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct IteratorGenerator<I>(I);
[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] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `GeneratorIterator` is never constructed
[INFO] [stdout]   --> src/iter.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub struct GeneratorIterator<G>(G);
[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] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `yagen` (lib) due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: struct `Compose` is never constructed
[INFO] [stdout]  --> src/compose.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Compose<F0, F1>(F0, F1);
[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] [stdout] error: struct `IteratorGenerator` is never constructed
[INFO] [stdout]  --> src/iter.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct IteratorGenerator<I>(I);
[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] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `GeneratorIterator` is never constructed
[INFO] [stdout]   --> src/iter.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub struct GeneratorIterator<G>(G);
[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] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `yagen` (lib test) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "38f04681fe1ffbc5c805a811bb50878c2e1436d037770e9b60b89d43569fd13b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38f04681fe1ffbc5c805a811bb50878c2e1436d037770e9b60b89d43569fd13b", kill_on_drop: false }`
[INFO] [stdout] 38f04681fe1ffbc5c805a811bb50878c2e1436d037770e9b60b89d43569fd13b
