[INFO] fetching crate arrowhead 0.1.0...
[INFO] checking arrowhead-0.1.0 against try#93086cfebfccb79083c59d0d3b2052944bba643c for pr-146440-1
[INFO] extracting crate arrowhead 0.1.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate arrowhead 0.1.0
[INFO] finished tweaking crates.io crate arrowhead 0.1.0
[INFO] tweaked toml for crates.io crate arrowhead 0.1.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate arrowhead 0.1.0 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "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" "+93086cfebfccb79083c59d0d3b2052944bba643c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 5fb88a64289749d7e91de0aaef77cb40f6a06462e5ffd291a01b8058cd828358
[INFO] running `Command { std: "docker" "start" "-a" "5fb88a64289749d7e91de0aaef77cb40f6a06462e5ffd291a01b8058cd828358", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5fb88a64289749d7e91de0aaef77cb40f6a06462e5ffd291a01b8058cd828358", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5fb88a64289749d7e91de0aaef77cb40f6a06462e5ffd291a01b8058cd828358", kill_on_drop: false }`
[INFO] [stdout] 5fb88a64289749d7e91de0aaef77cb40f6a06462e5ffd291a01b8058cd828358
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 98cc5e0ab4a92767bd32d79aa42e279331ab1e939ee3238fa039189e7b93895f
[INFO] running `Command { std: "docker" "start" "-a" "98cc5e0ab4a92767bd32d79aa42e279331ab1e939ee3238fa039189e7b93895f", kill_on_drop: false }`
[INFO] [stderr]     Checking arrowhead v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: struct `Records` is never constructed
[INFO] [stdout]   --> src/srv.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct Records(Vec<Record>);
[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] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/srv.rs:20:20
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct Records(Vec<Record>);
[INFO] [stdout]    |            ------- ^^^^^^^^^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `System` is never constructed
[INFO] [stdout]  --> src/sys.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct System {
[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 `Records` is never constructed
[INFO] [stdout]   --> src/sys.rs:42:12
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub struct Records(Vec<Record>);
[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] warning: field `0` is never read
[INFO] [stdout]   --> src/sys.rs:42:20
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub struct Records(Vec<Record>);
[INFO] [stdout]    |            ------- ^^^^^^^^^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `arrowhead` (lib) due to 3 previous errors; 2 warnings emitted
[INFO] [stdout] error: struct `Records` is never constructed
[INFO] [stdout]   --> src/srv.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct Records(Vec<Record>);
[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] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/srv.rs:20:20
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct Records(Vec<Record>);
[INFO] [stdout]    |            ------- ^^^^^^^^^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `System` is never constructed
[INFO] [stdout]  --> src/sys.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct System {
[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 `Records` is never constructed
[INFO] [stdout]   --> src/sys.rs:42:12
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub struct Records(Vec<Record>);
[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] warning: field `0` is never read
[INFO] [stdout]   --> src/sys.rs:42:20
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub struct Records(Vec<Record>);
[INFO] [stdout]    |            ------- ^^^^^^^^^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `arrowhead` (lib test) due to 3 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "98cc5e0ab4a92767bd32d79aa42e279331ab1e939ee3238fa039189e7b93895f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98cc5e0ab4a92767bd32d79aa42e279331ab1e939ee3238fa039189e7b93895f", kill_on_drop: false }`
[INFO] [stdout] 98cc5e0ab4a92767bd32d79aa42e279331ab1e939ee3238fa039189e7b93895f