[INFO] updating cached repository https://github.com/rvolz/rustrt
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ea996a856c178568bac820f8ddd2eacf03bb8d88
[INFO] testing rvolz/rustrt against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Frvolz%2Frustrt" "work/builds/worker-0/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rvolz/rustrt on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/rvolz/rustrt
[INFO] removed 7 missing tests
[INFO] finished tweaking git repo https://github.com/rvolz/rustrt
[INFO] tweaked toml for git repo https://github.com/rvolz/rustrt written to work/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/rvolz/rustrt already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] 83582d276a3e987fc610d96c8f6dbef2e4f1912cef5a9ae98ff076739f415219
[INFO] running `"docker" "start" "-a" "83582d276a3e987fc610d96c8f6dbef2e4f1912cef5a9ae98ff076739f415219"`
[INFO] [stderr]    Compiling derive_builder v0.7.0
[INFO] [stderr]    Compiling syn v0.15.26
[INFO] [stderr]    Compiling float-cmp v0.4.0
[INFO] [stderr]    Compiling darling_core v0.8.2
[INFO] [stderr]    Compiling darling_macro v0.8.2
[INFO] [stderr]    Compiling darling v0.8.2
[INFO] [stderr]    Compiling derive_builder_core v0.4.0
[INFO] [stderr]    Compiling rustrt v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `Material`
[INFO] [stderr]   --> src/main.rs:22:23
[INFO] [stderr]    |
[INFO] [stderr] 22 | use crate::material::{Material, material};
[INFO] [stderr]    |                       ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `red`
[INFO] [stderr]    --> src/main.rs:150:7
[INFO] [stderr]     |
[INFO] [stderr] 150 |   let red = color(1.0,0.0,0.0);
[INFO] [stderr]     |       ^^^ help: consider prefixing with an underscore: `_red`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 19.03s
[INFO] running `"docker" "inspect" "83582d276a3e987fc610d96c8f6dbef2e4f1912cef5a9ae98ff076739f415219"`
[INFO] running `"docker" "rm" "-f" "83582d276a3e987fc610d96c8f6dbef2e4f1912cef5a9ae98ff076739f415219"`
[INFO] [stdout] 83582d276a3e987fc610d96c8f6dbef2e4f1912cef5a9ae98ff076739f415219
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] a2e5d229ef4899056de26334ddc8e190187bd926e8ed2fea83c42b820f8ea0f9
[INFO] running `"docker" "start" "-a" "a2e5d229ef4899056de26334ddc8e190187bd926e8ed2fea83c42b820f8ea0f9"`
[INFO] [stderr]    Compiling derive_builder v0.5.1
[INFO] [stderr]    Compiling round v0.1.0
[INFO] [stderr]    Compiling term_size v0.3.1
[INFO] [stderr]    Compiling derive_builder_core v0.2.0
[INFO] [stderr]    Compiling globset v0.4.2
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]    Compiling textwrap v0.10.0
[INFO] [stderr]    Compiling clap v2.32.0
[INFO] [stderr]    Compiling parking_lot v0.7.1
[INFO] [stderr]    Compiling crossbeam-channel v0.3.6
[INFO] [stderr]    Compiling gherkin_rust v0.4.1
[INFO] [stderr]    Compiling ignore v0.4.6
[INFO] [stderr]    Compiling globwalk v0.5.0
[INFO] [stderr]    Compiling cucumber_rust v0.5.1
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cucumber_rust-0.5.1/src/lib.rs:9:34
[INFO] [stderr]   |
[INFO] [stderr] 9 | #![cfg_attr(feature = "nightly", feature(set_stdio))]
[INFO] [stderr]   |                                  ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `cucumber_rust`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "a2e5d229ef4899056de26334ddc8e190187bd926e8ed2fea83c42b820f8ea0f9"`
[INFO] running `"docker" "rm" "-f" "a2e5d229ef4899056de26334ddc8e190187bd926e8ed2fea83c42b820f8ea0f9"`
[INFO] [stdout] a2e5d229ef4899056de26334ddc8e190187bd926e8ed2fea83c42b820f8ea0f9