[INFO] crate htmlhelp-sys 0.0.1 is already in cache
[INFO] extracting crate htmlhelp-sys 0.0.1 into work/ex/beta-1.38-1/sources/1.37.0/reg/htmlhelp-sys/0.0.1
[INFO] extracting crate htmlhelp-sys 0.0.1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/htmlhelp-sys/0.0.1
[INFO] validating manifest of htmlhelp-sys-0.0.1 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 htmlhelp-sys-0.0.1 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 htmlhelp-sys-0.0.1
[INFO] finished frobbing htmlhelp-sys-0.0.1
[INFO] frobbed toml for htmlhelp-sys-0.0.1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/htmlhelp-sys/0.0.1/Cargo.toml
[INFO] started frobbing htmlhelp-sys-0.0.1
[INFO] finished frobbing htmlhelp-sys-0.0.1
[INFO] frobbed toml for htmlhelp-sys-0.0.1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/htmlhelp-sys/0.0.1/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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing htmlhelp-sys-0.0.1 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-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/htmlhelp-sys/0.0.1:/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] 1d20b2ea8d72aa08727ac1ea67ddb3fe9a499a0f5e9256becdf95b1a67815a5e
[INFO] running `"docker" "start" "-a" "1d20b2ea8d72aa08727ac1ea67ddb3fe9a499a0f5e9256becdf95b1a67815a5e"`
[INFO] [stderr]    Compiling htmlhelp-sys v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0658]: non-builtin inner attributes are unstable
[INFO] [stderr]  --> src/lib.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | #![experimental]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/54726
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: The attribute `experimental` is currently unknown to the compiler and may have meaning added to it in the future
[INFO] [stderr]  --> src/lib.rs:5:4
[INFO] [stderr]   |
[INFO] [stderr] 5 | #![experimental]
[INFO] [stderr]   |    ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/29642
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `winapi::*`
[INFO] [stderr]  --> src/lib.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use winapi::*;
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0658`.
[INFO] [stderr] error: Could not compile `htmlhelp-sys`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "1d20b2ea8d72aa08727ac1ea67ddb3fe9a499a0f5e9256becdf95b1a67815a5e"`
[INFO] running `"docker" "rm" "-f" "1d20b2ea8d72aa08727ac1ea67ddb3fe9a499a0f5e9256becdf95b1a67815a5e"`
[INFO] [stdout] 1d20b2ea8d72aa08727ac1ea67ddb3fe9a499a0f5e9256becdf95b1a67815a5e