[INFO] crate termrect 0.1.2 is already in cache
[INFO] extracting crate termrect 0.1.2 into work/ex/beta-1.38-1/sources/1.37.0/reg/termrect/0.1.2
[INFO] extracting crate termrect 0.1.2 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/termrect/0.1.2
[INFO] validating manifest of termrect-0.1.2 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 termrect-0.1.2 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 termrect-0.1.2
[INFO] finished frobbing termrect-0.1.2
[INFO] frobbed toml for termrect-0.1.2 written to work/ex/beta-1.38-1/sources/1.37.0/reg/termrect/0.1.2/Cargo.toml
[INFO] started frobbing termrect-0.1.2
[INFO] finished frobbing termrect-0.1.2
[INFO] frobbed toml for termrect-0.1.2 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/termrect/0.1.2/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "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" "+1.37.0" "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 termrect-0.1.2 against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/termrect/0.1.2:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 1b4f346c9943ae1e09455d16365e1a0a7f3f75a55513d453620badd27630c1aa
[INFO] running `"docker" "start" "-a" "1b4f346c9943ae1e09455d16365e1a0a7f3f75a55513d453620badd27630c1aa"`
[INFO] [stderr]    Compiling numtoa v0.1.0
[INFO] [stderr]    Compiling termion v1.5.3
[INFO] [stderr]    Compiling termrect v0.1.2 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(collections_range)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/style.rs:12:36
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn termion_color(&self) -> Box<termion::color::Color> {
[INFO] [stderr]    |                                    ^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn termion::color::Color`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] 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 `termrect`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "1b4f346c9943ae1e09455d16365e1a0a7f3f75a55513d453620badd27630c1aa"`
[INFO] running `"docker" "rm" "-f" "1b4f346c9943ae1e09455d16365e1a0a7f3f75a55513d453620badd27630c1aa"`
[INFO] [stdout] 1b4f346c9943ae1e09455d16365e1a0a7f3f75a55513d453620badd27630c1aa