[INFO] updating cached repository crome110/iiif_images_sample
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/crome110/iiif_images_sample
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/crome110/iiif_images_sample" "work/ex/beta-1.38-1/sources/1.37.0/gh/crome110/iiif_images_sample"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/crome110/iiif_images_sample'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/crome110/iiif_images_sample" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/crome110/iiif_images_sample"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/crome110/iiif_images_sample'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] adbd1c06271db2b4b3fa78578613bd6f6d319883
[INFO] sha for GitHub repo crome110/iiif_images_sample: adbd1c06271db2b4b3fa78578613bd6f6d319883
[INFO] validating manifest of crome110/iiif_images_sample 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 crome110/iiif_images_sample 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 crome110/iiif_images_sample
[INFO] finished frobbing crome110/iiif_images_sample
[INFO] frobbed toml for crome110/iiif_images_sample written to work/ex/beta-1.38-1/sources/1.37.0/gh/crome110/iiif_images_sample/Cargo.toml
[INFO] started frobbing crome110/iiif_images_sample
[INFO] finished frobbing crome110/iiif_images_sample
[INFO] frobbed toml for crome110/iiif_images_sample written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/crome110/iiif_images_sample/Cargo.toml
[INFO] crate crome110/iiif_images_sample 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 crome110/iiif_images_sample 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-6/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/crome110/iiif_images_sample:/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] ace6d2e40e2a1a4e065ade4d11321973d819cd451c21886dfd51cf2c0b019c5f
[INFO] running `"docker" "start" "-a" "ace6d2e40e2a1a4e065ade4d11321973d819cd451c21886dfd51cf2c0b019c5f"`
[INFO] [stderr]    Compiling want v0.0.6
[INFO] [stderr]    Compiling miniz_oxide_c_api v0.2.1
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling futures-cpupool v0.1.8
[INFO] [stderr]    Compiling openssl v0.10.23
[INFO] [stderr]    Compiling cookie v0.12.0
[INFO] [stderr]    Compiling tokio-threadpool v0.1.14
[INFO] [stderr]    Compiling error-chain v0.12.1
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]    Compiling publicsuffix v1.5.2
[INFO] [stderr]    Compiling flate2 v1.0.7
[INFO] [stderr]    Compiling tokio-io v0.1.12
[INFO] [stderr]    Compiling http v0.1.17
[INFO] [stderr]    Compiling string v0.2.0
[INFO] [stderr]    Compiling tokio-buf v0.1.1
[INFO] [stderr]    Compiling cookie_store v0.7.0
[INFO] [stderr]    Compiling tokio-reactor v0.1.9
[INFO] [stderr]    Compiling tokio-tcp v0.1.3
[INFO] [stderr]    Compiling tokio v0.1.21
[INFO] [stderr]    Compiling native-tls v0.2.3
[INFO] [stderr]    Compiling h2 v0.1.23
[INFO] [stderr]    Compiling http-body v0.1.0
[INFO] [stderr]    Compiling hyper v0.12.29
[INFO] [stderr]    Compiling hyper-tls v0.3.2
[INFO] [stderr]    Compiling reqwest v0.9.17
[INFO] [stderr]    Compiling iiif_images 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:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(custom_attribute)]
[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 `iiif_images`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "ace6d2e40e2a1a4e065ade4d11321973d819cd451c21886dfd51cf2c0b019c5f"`
[INFO] running `"docker" "rm" "-f" "ace6d2e40e2a1a4e065ade4d11321973d819cd451c21886dfd51cf2c0b019c5f"`
[INFO] [stdout] ace6d2e40e2a1a4e065ade4d11321973d819cd451c21886dfd51cf2c0b019c5f