[INFO] updating cached repository makslevental/pg_dump_restore_tui
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/makslevental/pg_dump_restore_tui
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/makslevental/pg_dump_restore_tui" "work/ex/beta-1.38-1/sources/1.37.0/gh/makslevental/pg_dump_restore_tui"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/makslevental/pg_dump_restore_tui'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/makslevental/pg_dump_restore_tui" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/makslevental/pg_dump_restore_tui"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/makslevental/pg_dump_restore_tui'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] fd21f9e82e483083611a9fc4fd2475fc82060f27
[INFO] sha for GitHub repo makslevental/pg_dump_restore_tui: fd21f9e82e483083611a9fc4fd2475fc82060f27
[INFO] validating manifest of makslevental/pg_dump_restore_tui 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 makslevental/pg_dump_restore_tui 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 makslevental/pg_dump_restore_tui
[INFO] finished frobbing makslevental/pg_dump_restore_tui
[INFO] frobbed toml for makslevental/pg_dump_restore_tui written to work/ex/beta-1.38-1/sources/1.37.0/gh/makslevental/pg_dump_restore_tui/Cargo.toml
[INFO] started frobbing makslevental/pg_dump_restore_tui
[INFO] finished frobbing makslevental/pg_dump_restore_tui
[INFO] frobbed toml for makslevental/pg_dump_restore_tui written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/makslevental/pg_dump_restore_tui/Cargo.toml
[INFO] crate makslevental/pg_dump_restore_tui 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 makslevental/pg_dump_restore_tui 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-2/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/makslevental/pg_dump_restore_tui:/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] cae2a44f7e083041950f8e5b068b1c994f175d1c9b08e28c621a6dbe57b48c9e
[INFO] running `"docker" "start" "-a" "cae2a44f7e083041950f8e5b068b1c994f175d1c9b08e28c621a6dbe57b48c9e"`
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]    Compiling num-complex v0.2.0
[INFO] [stderr]    Compiling crossbeam-utils v0.4.1
[INFO] [stderr]    Compiling arc-swap v0.2.0
[INFO] [stderr]    Compiling array-macro v1.0.2
[INFO] [stderr]    Compiling reexport-proc-macro v1.0.5
[INFO] [stderr]    Compiling term_size v0.3.1
[INFO] [stderr]    Compiling ncurses v5.93.0
[INFO] [stderr]    Compiling smallvec v0.6.3
[INFO] [stderr]    Compiling enumset v0.3.11
[INFO] [stderr]    Compiling enum-map-derive v0.4.0
[INFO] [stderr]    Compiling num-rational v0.2.1
[INFO] [stderr]    Compiling regex v1.0.2
[INFO] [stderr]    Compiling crossbeam-epoch v0.5.1
[INFO] [stderr]    Compiling signal-hook v0.1.2
[INFO] [stderr]    Compiling parking_lot_core v0.2.14
[INFO] [stderr]    Compiling parking_lot v0.5.5
[INFO] [stderr]    Compiling num v0.2.0
[INFO] [stderr]    Compiling enum-map v0.4.1
[INFO] [stderr]    Compiling crossbeam-channel v0.2.3
[INFO] [stderr]    Compiling cursive v0.9.0
[INFO] [stderr]    Compiling tui 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:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(try_trait)]
[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 `tui`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "cae2a44f7e083041950f8e5b068b1c994f175d1c9b08e28c621a6dbe57b48c9e"`
[INFO] running `"docker" "rm" "-f" "cae2a44f7e083041950f8e5b068b1c994f175d1c9b08e28c621a6dbe57b48c9e"`
[INFO] [stdout] cae2a44f7e083041950f8e5b068b1c994f175d1c9b08e28c621a6dbe57b48c9e