[INFO] fetching crate screenshot 0.0.7...
[INFO] testing screenshot-0.0.7 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate screenshot 0.0.7 into /workspace/builds/worker-34/source
[INFO] validating manifest of crates.io crate screenshot 0.0.7 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", 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-34/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f20bd12e4d51d192899fc8b9a1e66c971a7a2f52bf4a9c129f2072aa2e3283a6
[INFO] running `Command { std: "docker" "start" "-a" "f20bd12e4d51d192899fc8b9a1e66c971a7a2f52bf4a9c129f2072aa2e3283a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f20bd12e4d51d192899fc8b9a1e66c971a7a2f52bf4a9c129f2072aa2e3283a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f20bd12e4d51d192899fc8b9a1e66c971a7a2f52bf4a9c129f2072aa2e3283a6", kill_on_drop: false }`
[INFO] [stdout] f20bd12e4d51d192899fc8b9a1e66c971a7a2f52bf4a9c129f2072aa2e3283a6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 33fa7ccb0d64e48e996e211552ad524771d0e5b7e61419e073a71c9563d079a3
[INFO] running `Command { std: "docker" "start" "-a" "33fa7ccb0d64e48e996e211552ad524771d0e5b7e61419e073a71c9563d079a3", 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 beta 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` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "33fa7ccb0d64e48e996e211552ad524771d0e5b7e61419e073a71c9563d079a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33fa7ccb0d64e48e996e211552ad524771d0e5b7e61419e073a71c9563d079a3", kill_on_drop: false }`
[INFO] [stdout] 33fa7ccb0d64e48e996e211552ad524771d0e5b7e61419e073a71c9563d079a3