[INFO] updating cached repository https://github.com/phaazon/kit-test
[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] aa97b51651479658ee06c92a3bbafd613e0a961c
[INFO] testing phaazon/kit-test against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fphaazon%2Fkit-test" "work/builds/worker-1/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/phaazon/kit-test 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/phaazon/kit-test
[INFO] finished tweaking git repo https://github.com/phaazon/kit-test
[INFO] tweaked toml for git repo https://github.com/phaazon/kit-test written to work/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/phaazon/kit-test 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-1/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] 0e82fe904abff813934870994a0a1dd58ac543d5dd73e51d38a67a0805f3fd96
[INFO] running `"docker" "start" "-a" "0e82fe904abff813934870994a0a1dd58ac543d5dd73e51d38a67a0805f3fd96"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling spectra v0.12.0
[INFO] [stderr]    Compiling any-cache v0.2.3
[INFO] [stderr]    Compiling luminance-windowing v0.1.1
[INFO] [stderr]    Compiling cmake v0.1.31
[INFO] [stderr]    Compiling ogg-sys v0.0.9
[INFO] [stderr]    Compiling vorbis-sys v0.0.8
[INFO] [stderr]    Compiling net2 v0.2.32
[INFO] [stderr]    Compiling vorbis-encoder v0.1.4
[INFO] [stderr]    Compiling vorbisfile-sys v0.0.8
[INFO] [stderr]    Compiling nix v0.5.1
[INFO] [stderr]    Compiling filetime v0.1.15
[INFO] [stderr]    Compiling inotify v0.3.0
[INFO] [stderr]    Compiling parking_lot_core v0.2.14
[INFO] [stderr]    Compiling nom v3.2.1
[INFO] [stderr]    Compiling gl_generator v0.9.0
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling png v0.11.0
[INFO] [stderr]    Compiling cgmath v0.15.0
[INFO] [stderr]    Compiling rental-impl v0.5.0
[INFO] [stderr]    Compiling rayon-core v1.4.0
[INFO] [stderr]    Compiling miow v0.1.5
[INFO] [stderr]    Compiling parking_lot v0.4.8
[INFO] [stderr]    Compiling glfw-sys v3.2.2
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling glsl v0.7.2
[INFO] [stderr]    Compiling rayon v1.0.1
[INFO] [stderr]    Compiling gl v0.10.0
[INFO] [stderr]    Compiling mio v0.5.1
[INFO] [stderr]    Compiling vorbis v0.1.0
[INFO] [stderr]    Compiling notify v4.0.3
[INFO] [stderr]    Compiling warmy v0.7.2
[INFO] [stderr]    Compiling jpeg-decoder v0.1.14
[INFO] [stderr]    Compiling glfw v0.20.0
[INFO] [stderr]    Compiling image v0.17.0
[INFO] [stderr]    Compiling luminance-glfw v0.4.3
[INFO] [stderr]    Compiling luminance v0.25.7
[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/luminance-0.25.7/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(const_fn)]
[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 `luminance`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "0e82fe904abff813934870994a0a1dd58ac543d5dd73e51d38a67a0805f3fd96"`
[INFO] running `"docker" "rm" "-f" "0e82fe904abff813934870994a0a1dd58ac543d5dd73e51d38a67a0805f3fd96"`
[INFO] [stdout] 0e82fe904abff813934870994a0a1dd58ac543d5dd73e51d38a67a0805f3fd96