[INFO] updating cached repository 2m/rust-vilnius-1
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/2m/rust-vilnius-1
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/2m/rust-vilnius-1" "work/ex/beta-1.38-1/sources/1.37.0/gh/2m/rust-vilnius-1"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/2m/rust-vilnius-1'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/2m/rust-vilnius-1" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/2m/rust-vilnius-1"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/2m/rust-vilnius-1'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6ebb8658043cfe466d64b47d72747e93493429e2
[INFO] sha for GitHub repo 2m/rust-vilnius-1: 6ebb8658043cfe466d64b47d72747e93493429e2
[INFO] validating manifest of 2m/rust-vilnius-1 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of 2m/rust-vilnius-1 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing 2m/rust-vilnius-1
[INFO] finished frobbing 2m/rust-vilnius-1
[INFO] frobbed toml for 2m/rust-vilnius-1 written to work/ex/beta-1.38-1/sources/1.37.0/gh/2m/rust-vilnius-1/Cargo.toml
[INFO] started frobbing 2m/rust-vilnius-1
[INFO] finished frobbing 2m/rust-vilnius-1
[INFO] frobbed toml for 2m/rust-vilnius-1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/2m/rust-vilnius-1/Cargo.toml
[INFO] crate 2m/rust-vilnius-1 already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing 2m/rust-vilnius-1 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/2m/rust-vilnius-1:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 4b450c5399ff722f5dc6b25a4f211ec39ae59b9ee2ee0d5c43d3dc1b1aebb8a9
[INFO] running `"docker" "start" "-a" "4b450c5399ff722f5dc6b25a4f211ec39ae59b9ee2ee0d5c43d3dc1b1aebb8a9"`
[INFO] [stderr]    Compiling rustc-demangle v0.1.3
[INFO] [stderr]    Compiling backtrace-sys v0.1.5
[INFO] [stderr]    Compiling phf_codegen v0.7.19
[INFO] [stderr]    Compiling tempfile v2.1.4
[INFO] [stderr]    Compiling glium v0.15.0
[INFO] [stderr]    Compiling wayland-client v0.5.12
[INFO] [stderr]    Compiling fs2 v0.2.5
[INFO] [stderr]    Compiling x11-dl v2.11.0
[INFO] [stderr]    Compiling glutin v0.6.2
[INFO] [stderr]    Compiling memmap v0.2.3
[INFO] [stderr]    Compiling target_build_utils v0.1.2
[INFO] [stderr]    Compiling backtrace v0.2.3
[INFO] [stderr]    Compiling libloading v0.3.1
[INFO] [stderr]    Compiling dlib v0.3.1
[INFO] [stderr]    Compiling wayland-sys v0.5.11
[INFO] [stderr]    Compiling wayland-kbd v0.3.6
[INFO] [stderr]    Compiling wayland-window v0.2.3
[INFO] [stderr]    Compiling rust-vilnius v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(duration_checked_ops)]
[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 `rust-vilnius`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "4b450c5399ff722f5dc6b25a4f211ec39ae59b9ee2ee0d5c43d3dc1b1aebb8a9"`
[INFO] running `"docker" "rm" "-f" "4b450c5399ff722f5dc6b25a4f211ec39ae59b9ee2ee0d5c43d3dc1b1aebb8a9"`
[INFO] [stdout] 4b450c5399ff722f5dc6b25a4f211ec39ae59b9ee2ee0d5c43d3dc1b1aebb8a9