[INFO] fetching crate screenshot 0.0.7...
[INFO] testing screenshot-0.0.7 against 1.47.0 for beta-1.48-1
[INFO] extracting crate screenshot 0.0.7 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate screenshot 0.0.7 on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate screenshot 0.0.7
[INFO] finished tweaking crates.io crate screenshot 0.0.7
[INFO] tweaked toml for crates.io crate screenshot 0.0.7 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 147c8336f2a8e8252d72bd58737816e54195554b0c3936ba466df7d5cd6c6ae0
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "147c8336f2a8e8252d72bd58737816e54195554b0c3936ba466df7d5cd6c6ae0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "147c8336f2a8e8252d72bd58737816e54195554b0c3936ba466df7d5cd6c6ae0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "147c8336f2a8e8252d72bd58737816e54195554b0c3936ba466df7d5cd6c6ae0", kill_on_drop: false }`
[INFO] [stdout] 147c8336f2a8e8252d72bd58737816e54195554b0c3936ba466df7d5cd6c6ae0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b084ff3f869e24adaf0b4f2a6a492ee087187fac8353d2e2180878c21180bf02
[INFO] running `Command { std: "docker" "start" "-a" "b084ff3f869e24adaf0b4f2a6a492ee087187fac8353d2e2180878c21180bf02", kill_on_drop: false }`
[INFO] [stderr]    Compiling screenshot v0.0.7 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `ffi`
[INFO] [stdout]   --> src/lib.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub use ffi::{get_screenshot};
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         unresolved import
[INFO] [stdout]    |         help: a similar path exists: `std::ffi`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | #![feature(core_intrinsics, convert)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `screenshot`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "b084ff3f869e24adaf0b4f2a6a492ee087187fac8353d2e2180878c21180bf02", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b084ff3f869e24adaf0b4f2a6a492ee087187fac8353d2e2180878c21180bf02", kill_on_drop: false }`
[INFO] [stdout] b084ff3f869e24adaf0b4f2a6a492ee087187fac8353d2e2180878c21180bf02
