[INFO] crate capture 0.1.0 is already in cache
[INFO] extracting crate capture 0.1.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/capture/0.1.0
[INFO] extracting crate capture 0.1.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/capture/0.1.0
[INFO] validating manifest of capture-0.1.0 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 capture-0.1.0 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 capture-0.1.0
[INFO] finished frobbing capture-0.1.0
[INFO] frobbed toml for capture-0.1.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/capture/0.1.0/Cargo.toml
[INFO] started frobbing capture-0.1.0
[INFO] finished frobbing capture-0.1.0
[INFO] frobbed toml for capture-0.1.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/capture/0.1.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing capture-0.1.0 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-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/capture/0.1.0:/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] 59d22d3c5512bf4fbaaac89dc88985b604697a3323435beed90b258a55a1b4cb
[INFO] running `"docker" "start" "-a" "59d22d3c5512bf4fbaaac89dc88985b604697a3323435beed90b258a55a1b4cb"`
[INFO] [stderr] warning: path `/opt/crater/workdir/src/capture.rs` was erroneously implicitly accepted for library `capture`,
[INFO] [stderr] please rename the file to `src/lib.rs` or set lib.path in Cargo.toml
[INFO] [stderr]    Compiling capture v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0658]: non-builtin inner attributes are unstable
[INFO] [stderr]   --> src/capture.rs:58:1
[INFO] [stderr]    |
[INFO] [stderr] 58 | #![license = "MIT"]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/54726
[INFO] [stderr] 
[INFO] [stderr] error: cannot find attribute macro `license` in this scope
[INFO] [stderr]   --> src/capture.rs:58:4
[INFO] [stderr]    |
[INFO] [stderr] 58 | #![license = "MIT"]
[INFO] [stderr]    |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> src/capture.rs:60:1
[INFO] [stderr]    |
[INFO] [stderr] 60 | #![feature(macro_rules)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0554, E0658.
[INFO] [stderr] For more information about an error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `capture`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "59d22d3c5512bf4fbaaac89dc88985b604697a3323435beed90b258a55a1b4cb"`
[INFO] running `"docker" "rm" "-f" "59d22d3c5512bf4fbaaac89dc88985b604697a3323435beed90b258a55a1b4cb"`
[INFO] [stdout] 59d22d3c5512bf4fbaaac89dc88985b604697a3323435beed90b258a55a1b4cb