[INFO] fetching crate mufmt 0.5.3...
[INFO] checking mufmt-0.5.3 against try#0611f7de057c584b8771102fde7aed6c70c71d3b for pr-146440
[INFO] extracting crate mufmt 0.5.3 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate mufmt 0.5.3
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate mufmt 0.5.3
[INFO] tweaked toml for crates.io crate mufmt 0.5.3 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate mufmt 0.5.3 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 mufmt 0.5.3 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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 1d9b708836e47fe0537c021375b180fbbd63c1595a52c700caf96e1bf2845dae
[INFO] running `Command { std: "docker" "start" "-a" "1d9b708836e47fe0537c021375b180fbbd63c1595a52c700caf96e1bf2845dae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1d9b708836e47fe0537c021375b180fbbd63c1595a52c700caf96e1bf2845dae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d9b708836e47fe0537c021375b180fbbd63c1595a52c700caf96e1bf2845dae", kill_on_drop: false }`
[INFO] [stdout] 1d9b708836e47fe0537c021375b180fbbd63c1595a52c700caf96e1bf2845dae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 5030a0ae574cbd6901b7ad1b4d4a381d052216de115c864ba549471f8eed0c52
[INFO] running `Command { std: "docker" "start" "-a" "5030a0ae574cbd6901b7ad1b4d4a381d052216de115c864ba549471f8eed0c52", kill_on_drop: false }`
[INFO] [stderr]     Checking mufmt v0.5.3 (/opt/rustwide/workdir)
[INFO] [stdout] error: struct `Limit` is never constructed
[INFO] [stdout]   --> examples/basic.rs:56:12
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub struct Limit(u8);
[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 `mufmt` (example "basic") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "5030a0ae574cbd6901b7ad1b4d4a381d052216de115c864ba549471f8eed0c52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5030a0ae574cbd6901b7ad1b4d4a381d052216de115c864ba549471f8eed0c52", kill_on_drop: false }`
[INFO] [stdout] 5030a0ae574cbd6901b7ad1b4d4a381d052216de115c864ba549471f8eed0c52
