[INFO] crate gust-render 0.2.0 is already in cache
[INFO] extracting crate gust-render 0.2.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/gust-render/0.2.0
[INFO] extracting crate gust-render 0.2.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/gust-render/0.2.0
[INFO] validating manifest of gust-render-0.2.0 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of gust-render-0.2.0 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing gust-render-0.2.0
[INFO] finished frobbing gust-render-0.2.0
[INFO] frobbed toml for gust-render-0.2.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/gust-render/0.2.0/Cargo.toml
[INFO] started frobbing gust-render-0.2.0
[INFO] finished frobbing gust-render-0.2.0
[INFO] frobbed toml for gust-render-0.2.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/gust-render/0.2.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing gust-render-0.2.0 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/gust-render/0.2.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] edc1fbf0295f5f1bb5e519df021418e3daae31a677b064303beed125ac5d1f3c
[INFO] running `"docker" "start" "-a" "edc1fbf0295f5f1bb5e519df021418e3daae31a677b064303beed125ac5d1f3c"`
[INFO] [stderr]    Compiling freetype-sys v0.7.1
[INFO] [stderr]    Compiling glfw-sys v3.3.0
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]    Compiling alga v0.7.2
[INFO] [stderr]    Compiling tiff v0.2.2
[INFO] [stderr]    Compiling num v0.2.0
[INFO] [stderr]    Compiling image v0.20.1
[INFO] [stderr]    Compiling freetype-rs v0.19.1
[INFO] [stderr]    Compiling nalgebra v0.16.13
[INFO] [stderr]    Compiling glfw v0.25.1
[INFO] [stderr] warning[E0502]: cannot borrow `*self` as immutable because it is also borrowed as mutable
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/nalgebra-0.16.13/src/base/cg.rs:291:44
[INFO] [stderr]     |
[INFO] [stderr] 291 |                 self[(j, i)] += shift[j] * self[(D::dim() - 1, i)];
[INFO] [stderr]     |                 ---------------------------^^^^-------------------
[INFO] [stderr]     |                 |                          |
[INFO] [stderr]     |                 |                          immutable borrow occurs here
[INFO] [stderr]     |                 mutable borrow occurs here
[INFO] [stderr]     |                 mutable borrow later used here
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]     = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr] 
[INFO] [stderr]    Compiling gust-render v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]   --> src/lib.rs:72:1
[INFO] [stderr]    |
[INFO] [stderr] 72 | #![feature(test)]
[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 `gust-render`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "edc1fbf0295f5f1bb5e519df021418e3daae31a677b064303beed125ac5d1f3c"`
[INFO] running `"docker" "rm" "-f" "edc1fbf0295f5f1bb5e519df021418e3daae31a677b064303beed125ac5d1f3c"`
[INFO] [stdout] edc1fbf0295f5f1bb5e519df021418e3daae31a677b064303beed125ac5d1f3c