[INFO] crate rx_gtk 0.1.1 is already in cache
[INFO] extracting crate rx_gtk 0.1.1 into work/ex/beta-1.38-1/sources/1.37.0/reg/rx_gtk/0.1.1
[INFO] extracting crate rx_gtk 0.1.1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rx_gtk/0.1.1
[INFO] validating manifest of rx_gtk-0.1.1 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 rx_gtk-0.1.1 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 rx_gtk-0.1.1
[INFO] finished frobbing rx_gtk-0.1.1
[INFO] frobbed toml for rx_gtk-0.1.1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/rx_gtk/0.1.1/Cargo.toml
[INFO] started frobbing rx_gtk-0.1.1
[INFO] finished frobbing rx_gtk-0.1.1
[INFO] frobbed toml for rx_gtk-0.1.1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rx_gtk/0.1.1/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] 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 rx_gtk-0.1.1 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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/rx_gtk/0.1.1:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 0af0d279382a8b1aa54d2b583acabbc51af85f52a6ba0b79148875975749d2ee
[INFO] running `"docker" "start" "-a" "0af0d279382a8b1aa54d2b583acabbc51af85f52a6ba0b79148875975749d2ee"`
[INFO] [stderr]    Compiling gio v0.5.1
[INFO] [stderr]    Compiling fragile v0.3.0
[INFO] [stderr]    Compiling gdk-pixbuf v0.5.0
[INFO] [stderr]    Compiling cairo-rs v0.5.0
[INFO] [stderr]    Compiling gdk v0.9.0
[INFO] [stderr]    Compiling gtk v0.5.0
[INFO] [stderr]    Compiling rxrs v0.1.0-alpha4
[INFO] [stderr]    Compiling glib-sys v0.7.0
[INFO] [stderr]    Compiling gobject-sys v0.7.0
[INFO] [stderr]    Compiling gio-sys v0.7.0
[INFO] [stderr] error[E0432]: unresolved import `std::boxed::FnBox`
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/rxrs-0.1.0-alpha4/src/unsub.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::boxed::FnBox;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^ no `FnBox` in `boxed`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `std::boxed::FnBox`
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/rxrs-0.1.0-alpha4/src/scheduler/mod.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::boxed::FnBox;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^ no `FnBox` in `boxed`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/rxrs-0.1.0-alpha4/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | / #![feature(fn_traits, unboxed_closures, integer_atomics, optin_builtin_traits, fnbox,
[INFO] [stderr] 2 | |     test, cell_update, box_syntax, coerce_unsized, unsize,
[INFO] [stderr] 3 | | )]
[INFO] [stderr]   | |__^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: Could not compile `rxrs`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "0af0d279382a8b1aa54d2b583acabbc51af85f52a6ba0b79148875975749d2ee"`
[INFO] running `"docker" "rm" "-f" "0af0d279382a8b1aa54d2b583acabbc51af85f52a6ba0b79148875975749d2ee"`
[INFO] [stdout] 0af0d279382a8b1aa54d2b583acabbc51af85f52a6ba0b79148875975749d2ee