[INFO] updating cached repository jos-b/just
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/jos-b/just
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/jos-b/just" "work/ex/beta-1.38-1/sources/1.37.0/gh/jos-b/just"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/jos-b/just'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jos-b/just" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jos-b/just"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jos-b/just'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 97ca9176b1fca9c18c7792eb3acded6914480840
[INFO] sha for GitHub repo jos-b/just: 97ca9176b1fca9c18c7792eb3acded6914480840
[INFO] validating manifest of jos-b/just 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 jos-b/just 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 jos-b/just
[INFO] finished frobbing jos-b/just
[INFO] frobbed toml for jos-b/just written to work/ex/beta-1.38-1/sources/1.37.0/gh/jos-b/just/Cargo.toml
[INFO] started frobbing jos-b/just
[INFO] finished frobbing jos-b/just
[INFO] frobbed toml for jos-b/just written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jos-b/just/Cargo.toml
[INFO] crate jos-b/just 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 jos-b/just 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-4/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/jos-b/just:/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] c6e6e2caa6e9d723243fb72a7eb4e671e68036e4dca3d18b0a5321815a5d3753
[INFO] running `"docker" "start" "-a" "c6e6e2caa6e9d723243fb72a7eb4e671e68036e4dca3d18b0a5321815a5d3753"`
[INFO] [stderr]    Compiling winapi v0.3.7
[INFO] [stderr]    Compiling cgmath v0.16.1
[INFO] [stderr]    Compiling winconsole v0.10.0
[INFO] [stderr]    Compiling colored v1.8.0
[INFO] [stderr]    Compiling just 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(bind_by_move_pattern_guards)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `log::trace`
[INFO] [stderr]  --> src/tokenize.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use log::trace;
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[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 `just`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "c6e6e2caa6e9d723243fb72a7eb4e671e68036e4dca3d18b0a5321815a5d3753"`
[INFO] running `"docker" "rm" "-f" "c6e6e2caa6e9d723243fb72a7eb4e671e68036e4dca3d18b0a5321815a5d3753"`
[INFO] [stdout] c6e6e2caa6e9d723243fb72a7eb4e671e68036e4dca3d18b0a5321815a5d3753