[INFO] fetching crate whippyunits 0.1.2...
[INFO] checking whippyunits-0.1.2 against try#93086cfebfccb79083c59d0d3b2052944bba643c for pr-146440-1
[INFO] extracting crate whippyunits 0.1.2 into /workspace/builds/worker-7-tc2/source
[INFO] removed /workspace/builds/worker-7-tc2/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate whippyunits 0.1.2
[INFO] removed 0 missing examples
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate whippyunits 0.1.2
[INFO] tweaked toml for crates.io crate whippyunits 0.1.2 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate whippyunits 0.1.2 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 whippyunits 0.1.2 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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] d8fe6c9d70f4d8b067e17693a1dbc2da113a821c1ceea7b34e31e666ddaecfb6
[INFO] running `Command { std: "docker" "start" "-a" "d8fe6c9d70f4d8b067e17693a1dbc2da113a821c1ceea7b34e31e666ddaecfb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d8fe6c9d70f4d8b067e17693a1dbc2da113a821c1ceea7b34e31e666ddaecfb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8fe6c9d70f4d8b067e17693a1dbc2da113a821c1ceea7b34e31e666ddaecfb6", kill_on_drop: false }`
[INFO] [stdout] d8fe6c9d70f4d8b067e17693a1dbc2da113a821c1ceea7b34e31e666ddaecfb6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 1176d99665d0d148999f89e4cda83ea003d312056f1a7d182e467d96add01905
[INFO] running `Command { std: "docker" "start" "-a" "1176d99665d0d148999f89e4cda83ea003d312056f1a7d182e467d96add01905", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.102
[INFO] [stderr]    Compiling quote v1.0.41
[INFO] [stderr]    Compiling unicode-ident v1.0.20
[INFO] [stderr]    Compiling serde_json v1.0.145
[INFO] [stderr]     Checking itoa v1.0.15
[INFO] [stderr]    Compiling target-triple v0.1.4
[INFO] [stderr]     Checking ryu v1.0.20
[INFO] [stderr]     Checking winnow v0.7.13
[INFO] [stderr]     Checking memchr v2.7.6
[INFO] [stderr]    Compiling litrs v0.5.1
[INFO] [stderr]     Checking toml_writer v1.0.4
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking toml_datetime v0.7.3
[INFO] [stderr]     Checking serde_spanned v1.0.3
[INFO] [stderr]    Compiling culit v0.6.0
[INFO] [stderr]     Checking syn v2.0.108
[INFO] [stderr]     Checking toml_parser v1.0.4
[INFO] [stderr]     Checking toml v0.9.8
[INFO] [stderr]     Checking whippyunits-core v0.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling op_result v0.5.8
[INFO] [stderr]    Compiling whippyunits-proc-macros v0.1.0
[INFO] [stderr]     Checking serde v1.0.228
[INFO] [stderr]     Checking trybuild v1.0.112
[INFO] [stderr]     Checking whippyunits v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error: struct `Helper` is never constructed
[INFO] [stdout]   --> src/lib.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct Helper<const N: usize, ActualT>(ActualT);
[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 `whippyunits` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: struct `Helper` is never constructed
[INFO] [stdout]   --> src/lib.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct Helper<const N: usize, ActualT>(ActualT);
[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 `whippyunits` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "1176d99665d0d148999f89e4cda83ea003d312056f1a7d182e467d96add01905", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1176d99665d0d148999f89e4cda83ea003d312056f1a7d182e467d96add01905", kill_on_drop: false }`
[INFO] [stdout] 1176d99665d0d148999f89e4cda83ea003d312056f1a7d182e467d96add01905
