[INFO] updating cached repository ponkore/screenshot-example
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ponkore/screenshot-example
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ponkore/screenshot-example" "work/ex/beta-1.38-1/sources/1.37.0/gh/ponkore/screenshot-example"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ponkore/screenshot-example'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ponkore/screenshot-example" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ponkore/screenshot-example"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ponkore/screenshot-example'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 849348a77e3d5f5cfd974fb7ede22be64dddbc06
[INFO] sha for GitHub repo ponkore/screenshot-example: 849348a77e3d5f5cfd974fb7ede22be64dddbc06
[INFO] validating manifest of ponkore/screenshot-example 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 ponkore/screenshot-example 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 ponkore/screenshot-example
[INFO] finished frobbing ponkore/screenshot-example
[INFO] frobbed toml for ponkore/screenshot-example written to work/ex/beta-1.38-1/sources/1.37.0/gh/ponkore/screenshot-example/Cargo.toml
[INFO] started frobbing ponkore/screenshot-example
[INFO] finished frobbing ponkore/screenshot-example
[INFO] frobbed toml for ponkore/screenshot-example written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ponkore/screenshot-example/Cargo.toml
[INFO] crate ponkore/screenshot-example 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 ponkore/screenshot-example 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/ponkore/screenshot-example:/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] b82ef5fac72573fa8fd5d89e70851bcbf489d34310abcba47e15c4d26196a92e
[INFO] running `"docker" "start" "-a" "b82ef5fac72573fa8fd5d89e70851bcbf489d34310abcba47e15c4d26196a92e"`
[INFO] [stderr]    Compiling adler32 v0.3.0
[INFO] [stderr]    Compiling rand v0.3.15
[INFO] [stderr]    Compiling num_cpus v1.2.1
[INFO] [stderr]    Compiling screenshot v0.0.7
[INFO] [stderr]    Compiling enum_primitive v0.1.1
[INFO] [stderr]    Compiling num-rational v0.1.35
[INFO] [stderr] error[E0432]: unresolved import `ffi`
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/screenshot-0.0.7/src/lib.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub use ffi::{get_screenshot};
[INFO] [stderr]    |         ^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         unresolved import
[INFO] [stderr]    |         help: a similar path exists: `std::ffi`
[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/screenshot-0.0.7/src/lib.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | #![feature(core_intrinsics, convert)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 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 `screenshot`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "b82ef5fac72573fa8fd5d89e70851bcbf489d34310abcba47e15c4d26196a92e"`
[INFO] running `"docker" "rm" "-f" "b82ef5fac72573fa8fd5d89e70851bcbf489d34310abcba47e15c4d26196a92e"`
[INFO] [stdout] b82ef5fac72573fa8fd5d89e70851bcbf489d34310abcba47e15c4d26196a92e