[INFO] updating cached repository axiom-micro/recorder
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/axiom-micro/recorder
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/axiom-micro/recorder" "work/ex/beta-1.38-1/sources/1.37.0/gh/axiom-micro/recorder"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/axiom-micro/recorder'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/axiom-micro/recorder" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/axiom-micro/recorder"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/axiom-micro/recorder'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3f859372dffcd5fbb606c60d667bab1b1a854e86
[INFO] sha for GitHub repo axiom-micro/recorder: 3f859372dffcd5fbb606c60d667bab1b1a854e86
[INFO] validating manifest of axiom-micro/recorder 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 axiom-micro/recorder 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 axiom-micro/recorder
[INFO] finished frobbing axiom-micro/recorder
[INFO] frobbed toml for axiom-micro/recorder written to work/ex/beta-1.38-1/sources/1.37.0/gh/axiom-micro/recorder/Cargo.toml
[INFO] started frobbing axiom-micro/recorder
[INFO] finished frobbing axiom-micro/recorder
[INFO] frobbed toml for axiom-micro/recorder written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/axiom-micro/recorder/Cargo.toml
[INFO] crate axiom-micro/recorder 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 axiom-micro/recorder 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-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/axiom-micro/recorder:/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] 3fb6fddda999fc820aff5937fff1006b366bf8eb0ff39540f0b3fa1ab60db55a
[INFO] running `"docker" "start" "-a" "3fb6fddda999fc820aff5937fff1006b366bf8eb0ff39540f0b3fa1ab60db55a"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling cc v1.0.24
[INFO] [stderr]    Compiling atomic-option v0.1.2
[INFO] [stderr]    Compiling servo-fontconfig-sys v4.0.6
[INFO] [stderr]    Compiling thread-id v3.3.0
[INFO] [stderr]    Compiling parking_lot_core v0.3.0
[INFO] [stderr]    Compiling gl_generator v0.9.0
[INFO] [stderr]    Compiling parking_lot_core v0.2.14
[INFO] [stderr]    Compiling euclid v0.19.0
[INFO] [stderr]    Compiling flame v0.2.2
[INFO] [stderr]    Compiling parking_lot v0.6.4
[INFO] [stderr]    Compiling bus v2.0.0
[INFO] [stderr]    Compiling lyon_geom v0.12.1
[INFO] [stderr]    Compiling libloading v0.5.0
[INFO] [stderr]    Compiling cmake v0.1.34
[INFO] [stderr]    Compiling backtrace-sys v0.1.24
[INFO] [stderr]    Compiling glutin v0.17.0
[INFO] [stderr]    Compiling glium v0.22.0
[INFO] [stderr]    Compiling glutin v0.18.0
[INFO] [stderr]    Compiling servo-freetype-sys v4.0.3
[INFO] [stderr]    Compiling expat-sys v2.1.5
[INFO] [stderr]    Compiling lyon_path v0.12.0
[INFO] [stderr]    Compiling dlib v0.4.1
[INFO] [stderr]    Compiling wayland-sys v0.20.12
[INFO] [stderr]    Compiling backtrace v0.3.9
[INFO] [stderr]    Compiling failure v0.1.2
[INFO] [stderr]    Compiling wayland-commons v0.20.12
[INFO] [stderr]    Compiling wayland-client v0.20.12
[INFO] [stderr]    Compiling wayland-protocols v0.20.12
[INFO] [stderr]    Compiling smithay-client-toolkit v0.2.6
[INFO] [stderr]    Compiling smithay-client-toolkit v0.3.0
[INFO] [stderr]    Compiling freetype v0.4.1
[INFO] [stderr]    Compiling winit v0.17.2
[INFO] [stderr]    Compiling winit v0.16.2
[INFO] [stderr]    Compiling servo-fontconfig v0.4.0
[INFO] [stderr]    Compiling font-kit v0.1.0
[INFO] [stderr]    Compiling recorder v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(type_ascription)]
[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 `recorder`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "3fb6fddda999fc820aff5937fff1006b366bf8eb0ff39540f0b3fa1ab60db55a"`
[INFO] running `"docker" "rm" "-f" "3fb6fddda999fc820aff5937fff1006b366bf8eb0ff39540f0b3fa1ab60db55a"`
[INFO] [stdout] 3fb6fddda999fc820aff5937fff1006b366bf8eb0ff39540f0b3fa1ab60db55a