[INFO] fetching crate csparse21 0.2.3...
[INFO] checking csparse21-0.2.3 against try#0611f7de057c584b8771102fde7aed6c70c71d3b for pr-146440
[INFO] extracting crate csparse21 0.2.3 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate csparse21 0.2.3
[INFO] finished tweaking crates.io crate csparse21 0.2.3
[INFO] tweaked toml for crates.io crate csparse21 0.2.3 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate csparse21 0.2.3 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] 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] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 4 packages to latest compatible versions
[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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 4de35ab3ddbaada4b5517477c504b27073ca2ca3753e4cb2c8829aad3b7d4332
[INFO] running `Command { std: "docker" "start" "-a" "4de35ab3ddbaada4b5517477c504b27073ca2ca3753e4cb2c8829aad3b7d4332", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4de35ab3ddbaada4b5517477c504b27073ca2ca3753e4cb2c8829aad3b7d4332", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4de35ab3ddbaada4b5517477c504b27073ca2ca3753e4cb2c8829aad3b7d4332", kill_on_drop: false }`
[INFO] [stdout] 4de35ab3ddbaada4b5517477c504b27073ca2ca3753e4cb2c8829aad3b7d4332
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] f7d48be6dcf634c3b93d811f41af516ca62f8aedac8f5ef4c477b90cec8bd91d
[INFO] running `Command { std: "docker" "start" "-a" "f7d48be6dcf634c3b93d811f41af516ca62f8aedac8f5ef4c477b90cec8bd91d", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking glob v0.3.3
[INFO] [stderr]     Checking num-complex v0.4.6
[INFO] [stderr]     Checking csparse21 v0.2.3 (/opt/rustwide/workdir)
[INFO] [stdout] error: struct `System` is never constructed
[INFO] [stdout]     --> src/lib.rs:1141:12
[INFO] [stdout]      |
[INFO] [stdout] 1141 | 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]      = note: `#[deny(unused_unconstructable_pub_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `NonRealNumError` is never constructed
[INFO] [stdout]     --> src/lib.rs:1117:8
[INFO] [stdout]      |
[INFO] [stdout] 1117 | struct NonRealNumError;
[INFO] [stdout]      |        ^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[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/lib.rs:1141:12
[INFO] [stdout]      |
[INFO] [stdout] 1141 | 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]      = note: `#[deny(unused_unconstructable_pub_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `NonRealNumError` is never constructed
[INFO] [stdout]     --> src/lib.rs:1117:8
[INFO] [stdout]      |
[INFO] [stdout] 1117 | struct NonRealNumError;
[INFO] [stdout]      |        ^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `csparse21` (lib) due to 1 previous error; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `csparse21` (lib test) due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "f7d48be6dcf634c3b93d811f41af516ca62f8aedac8f5ef4c477b90cec8bd91d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f7d48be6dcf634c3b93d811f41af516ca62f8aedac8f5ef4c477b90cec8bd91d", kill_on_drop: false }`
[INFO] [stdout] f7d48be6dcf634c3b93d811f41af516ca62f8aedac8f5ef4c477b90cec8bd91d
