[INFO] fetching crate test_help-rs 0.1.0...
[INFO] testing test_help-rs-0.1.0 against 1.90.0 for beta-1.91-3
[INFO] extracting crate test_help-rs 0.1.0 into /workspace/builds/worker-6-tc1/source
[INFO] removed /workspace/builds/worker-6-tc1/source/.cargo/config.toml
[INFO] started tweaking crates.io crate test_help-rs 0.1.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate test_help-rs 0.1.0
[INFO] tweaked toml for crates.io crate test_help-rs 0.1.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate test_help-rs 0.1.0 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate test_help-rs 0.1.0 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" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded base-traits v0.0.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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_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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 966fef3281e79d40e4ea8a118f5a609dd099e307fd66a3cb058deb23cbe25443
[INFO] running `Command { std: "docker" "start" "-a" "966fef3281e79d40e4ea8a118f5a609dd099e307fd66a3cb058deb23cbe25443", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "966fef3281e79d40e4ea8a118f5a609dd099e307fd66a3cb058deb23cbe25443", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "966fef3281e79d40e4ea8a118f5a609dd099e307fd66a3cb058deb23cbe25443", kill_on_drop: false }`
[INFO] [stdout] 966fef3281e79d40e4ea8a118f5a609dd099e307fd66a3cb058deb23cbe25443
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c98e6c10d53f6c1140e3781ae78d819ea8b2fe197d648924604145544f097b7d
[INFO] running `Command { std: "docker" "start" "-a" "c98e6c10d53f6c1140e3781ae78d819ea8b2fe197d648924604145544f097b7d", kill_on_drop: false }`
[INFO] [stderr]    Compiling base-traits v0.0.3
[INFO] [stderr]    Compiling test_help-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.29s
[INFO] running `Command { std: "docker" "inspect" "c98e6c10d53f6c1140e3781ae78d819ea8b2fe197d648924604145544f097b7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c98e6c10d53f6c1140e3781ae78d819ea8b2fe197d648924604145544f097b7d", kill_on_drop: false }`
[INFO] [stdout] c98e6c10d53f6c1140e3781ae78d819ea8b2fe197d648924604145544f097b7d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2b19e8a3daa5902c6b29ec29f3bcaf292c648afd7265830412bbdc242139a366
[INFO] running `Command { std: "docker" "start" "-a" "2b19e8a3daa5902c6b29ec29f3bcaf292c648afd7265830412bbdc242139a366", kill_on_drop: false }`
[INFO] [stderr]    Compiling test_help-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `margin`
[INFO] [stdout]  --> examples/scalars.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     margin,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:9:19
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![cfg_attr(test, feature(more_float_constants))]
[INFO] [stdout]   |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `test_help-rs` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "2b19e8a3daa5902c6b29ec29f3bcaf292c648afd7265830412bbdc242139a366", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b19e8a3daa5902c6b29ec29f3bcaf292c648afd7265830412bbdc242139a366", kill_on_drop: false }`
[INFO] [stdout] 2b19e8a3daa5902c6b29ec29f3bcaf292c648afd7265830412bbdc242139a366