[INFO] fetching crate corolla 0.3.2...
[INFO] checking corolla-0.3.2 against master#540f43a224317d894a9a0710a8d67704f179a33c for pr-155193
[INFO] extracting crate corolla 0.3.2 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate corolla 0.3.2
[INFO] finished tweaking crates.io crate corolla 0.3.2
[INFO] tweaked toml for crates.io crate corolla 0.3.2 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate corolla 0.3.2 on toolchain 540f43a224317d894a9a0710a8d67704f179a33c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+540f43a224317d894a9a0710a8d67704f179a33c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate corolla 0.3.2 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" "+540f43a224317d894a9a0710a8d67704f179a33c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] [stdout] 2f47292f927ff798c1ed66be8c2683cb052a56dd6866d3ba673e748d77594fdf
[INFO] running `Command { std: "docker" "start" "-a" "2f47292f927ff798c1ed66be8c2683cb052a56dd6866d3ba673e748d77594fdf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2f47292f927ff798c1ed66be8c2683cb052a56dd6866d3ba673e748d77594fdf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f47292f927ff798c1ed66be8c2683cb052a56dd6866d3ba673e748d77594fdf", kill_on_drop: false }`
[INFO] [stdout] 2f47292f927ff798c1ed66be8c2683cb052a56dd6866d3ba673e748d77594fdf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "+540f43a224317d894a9a0710a8d67704f179a33c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 85c999f4916c2486d87f0da5fba52b70960ba0886beaedad86ca321bbdea6ef0
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[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/corolla/error.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 |     File(std::io::Error),
[INFO] [stdout]   |     ---- ^^^^^^^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 6 -     File(std::io::Error),
[INFO] [stdout] 6 +     File(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/corolla/error.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 7 |     JSON(serde_json::Error),
[INFO] [stdout]   |     ---- ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 7 -     JSON(serde_json::Error),
[INFO] [stdout] 7 +     JSON(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `QueryArg` is never constructed
[INFO] [stdout]   --> src/corolla/spec.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct QueryArg {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `QueryPart` is never used
[INFO] [stdout]   --> src/corolla/spec.rs:16:6
[INFO] [stdout]    |
[INFO] [stdout] 16 | enum QueryPart {
[INFO] [stdout]    |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/corolla/error.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 |     File(std::io::Error),
[INFO] [stdout]   |     ---- ^^^^^^^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 6 -     File(std::io::Error),
[INFO] [stdout] 6 +     File(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/corolla/error.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 7 |     JSON(serde_json::Error),
[INFO] [stdout]   |     ---- ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 7 -     JSON(serde_json::Error),
[INFO] [stdout] 7 +     JSON(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `QueryArg` is never constructed
[INFO] [stdout]   --> src/corolla/spec.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct QueryArg {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `QueryPart` is never used
[INFO] [stdout]   --> src/corolla/spec.rs:16:6
[INFO] [stdout]    |
[INFO] [stdout] 16 | enum QueryPart {
[INFO] [stdout]    |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 01s
[INFO] running `Command { std: "docker" "inspect" "85c999f4916c2486d87f0da5fba52b70960ba0886beaedad86ca321bbdea6ef0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "85c999f4916c2486d87f0da5fba52b70960ba0886beaedad86ca321bbdea6ef0", kill_on_drop: false }`
[INFO] [stdout] 85c999f4916c2486d87f0da5fba52b70960ba0886beaedad86ca321bbdea6ef0
