[INFO] updating cached repository darkwater/patternlock
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/darkwater/patternlock
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/darkwater/patternlock" "work/ex/beta-1.38-1/sources/1.37.0/gh/darkwater/patternlock"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/darkwater/patternlock'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/darkwater/patternlock" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/darkwater/patternlock"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/darkwater/patternlock'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 537bd2738220bb6e0011a3e0c6a3541baf49150d
[INFO] sha for GitHub repo darkwater/patternlock: 537bd2738220bb6e0011a3e0c6a3541baf49150d
[INFO] validating manifest of darkwater/patternlock 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 darkwater/patternlock 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 darkwater/patternlock
[INFO] finished frobbing darkwater/patternlock
[INFO] frobbed toml for darkwater/patternlock written to work/ex/beta-1.38-1/sources/1.37.0/gh/darkwater/patternlock/Cargo.toml
[INFO] started frobbing darkwater/patternlock
[INFO] finished frobbing darkwater/patternlock
[INFO] frobbed toml for darkwater/patternlock written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/darkwater/patternlock/Cargo.toml
[INFO] crate darkwater/patternlock 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing darkwater/patternlock 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-1/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/darkwater/patternlock:/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] 35333cade6a5d0c3a7549bec217fab0414d9b3189a13cd214bd18fa05079f136
[INFO] running `"docker" "start" "-a" "35333cade6a5d0c3a7549bec217fab0414d9b3189a13cd214bd18fa05079f136"`
[INFO] [stderr]    Compiling gio v0.1.1 (https://github.com/gtk-rs/gio#a7e8f44f)
[INFO] [stderr]    Compiling khronos_api v0.0.8
[INFO] [stderr]    Compiling gdk-pixbuf v0.1.1 (https://github.com/gtk-rs/gdk-pixbuf.git#739fe928)
[INFO] [stderr]    Compiling cairo-rs v0.1.1 (https://github.com/gtk-rs/cairo.git#8be0251d)
[INFO] [stderr]    Compiling gdk v0.5.1 (https://github.com/gtk-rs/gdk.git#8b334252)
[INFO] [stderr]    Compiling adler32 v0.3.0
[INFO] [stderr]    Compiling bitflags v0.2.1
[INFO] [stderr]    Compiling gtk v0.1.1 (https://github.com/gtk-rs/gtk.git#7a4b9660)
[INFO] [stderr]    Compiling scoped_threadpool v0.1.7
[INFO] [stderr]    Compiling glib-sys v0.3.2 (https://github.com/gtk-rs/sys.git#9ae84c22)
[INFO] [stderr]    Compiling gobject-sys v0.3.2 (https://github.com/gtk-rs/sys.git#9ae84c22)
[INFO] [stderr]    Compiling gio-sys v0.3.2 (https://github.com/gtk-rs/sys.git#9ae84c22)
[INFO] [stderr]    Compiling cairo-sys-rs v0.3.2 (https://github.com/gtk-rs/cairo.git#8be0251d)
[INFO] [stderr]    Compiling gdk-pixbuf-sys v0.3.2 (https://github.com/gtk-rs/sys.git#9ae84c22)
[INFO] [stderr]    Compiling pango-sys v0.3.2 (https://github.com/gtk-rs/sys.git#9ae84c22)
[INFO] [stderr]    Compiling gdk-sys v0.3.2 (https://github.com/gtk-rs/sys.git#9ae84c22)
[INFO] [stderr]    Compiling atk-sys v0.3.2 (https://github.com/gtk-rs/sys.git#9ae84c22)
[INFO] [stderr]    Compiling gtk-sys v0.3.2 (https://github.com/gtk-rs/sys.git#9ae84c22)
[INFO] [stderr]    Compiling num_cpus v1.2.1
[INFO] [stderr]    Compiling time v0.1.36
[INFO] [stderr]    Compiling xml-rs v0.1.26
[INFO] [stderr]    Compiling num-integer v0.1.33
[INFO] [stderr]    Compiling enum_primitive v0.1.1
[INFO] [stderr]    Compiling gl_common v0.1.0
[INFO] [stderr]    Compiling gif v0.9.1
[INFO] [stderr]    Compiling xlib v0.1.0 (https://github.com/servo/rust-xlib#38ce24e6)
[INFO] [stderr]    Compiling deflate v0.7.4
[INFO] [stderr]    Compiling shared_library v0.1.5
[INFO] [stderr]    Compiling deque v0.3.1
[INFO] [stderr]    Compiling num-iter v0.1.33
[INFO] [stderr]    Compiling num-rational v0.1.36
[INFO] [stderr]    Compiling screenshot v0.0.7 (https://github.com/darkwater/screenshot-rs#e808926a)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> /opt/crater/cargo-home/git/checkouts/screenshot-rs-a773e88c0337d451/e808926/src/lib.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | #![feature(core_intrinsics, convert)]
[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 `screenshot`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "35333cade6a5d0c3a7549bec217fab0414d9b3189a13cd214bd18fa05079f136"`
[INFO] running `"docker" "rm" "-f" "35333cade6a5d0c3a7549bec217fab0414d9b3189a13cd214bd18fa05079f136"`
[INFO] [stdout] 35333cade6a5d0c3a7549bec217fab0414d9b3189a13cd214bd18fa05079f136