[INFO] crate pinar 0.1.0 is already in cache
[INFO] extracting crate pinar 0.1.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/pinar/0.1.0
[INFO] extracting crate pinar 0.1.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/pinar/0.1.0
[INFO] validating manifest of pinar-0.1.0 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of pinar-0.1.0 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing pinar-0.1.0
[INFO] finished frobbing pinar-0.1.0
[INFO] frobbed toml for pinar-0.1.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/pinar/0.1.0/Cargo.toml
[INFO] started frobbing pinar-0.1.0
[INFO] finished frobbing pinar-0.1.0
[INFO] frobbed toml for pinar-0.1.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/pinar/0.1.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing pinar-0.1.0 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/pinar/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 8ead6425d6b119d85d3c61f3fdc1733dacf755f06e71909464086c9925cc7769
[INFO] running `"docker" "start" "-a" "8ead6425d6b119d85d3c61f3fdc1733dacf755f06e71909464086c9925cc7769"`
[INFO] [stderr]    Compiling pinar-napi-sys v0.1.0
[INFO] [stderr]    Compiling pinar-derive v0.1.0
[INFO] [stderr]    Compiling pinar v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | #![feature(core_intrinsics)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Error`
[INFO] [stderr]  --> src/classes.rs:2:29
[INFO] [stderr]   |
[INFO] [stderr] 2 | use crate::error::{JsError, Error};
[INFO] [stderr]   |                             ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `JsError`
[INFO] [stderr]  --> src/classes.rs:2:20
[INFO] [stderr]   |
[INFO] [stderr] 2 | use crate::error::{JsError, Error};
[INFO] [stderr]   |                    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `pinar`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "8ead6425d6b119d85d3c61f3fdc1733dacf755f06e71909464086c9925cc7769"`
[INFO] running `"docker" "rm" "-f" "8ead6425d6b119d85d3c61f3fdc1733dacf755f06e71909464086c9925cc7769"`
[INFO] [stdout] 8ead6425d6b119d85d3c61f3fdc1733dacf755f06e71909464086c9925cc7769