[INFO] crate simd_aligned 0.2.1 is already in cache
[INFO] extracting crate simd_aligned 0.2.1 into work/ex/beta-1.37-6/sources/1.36.0/reg/simd_aligned/0.2.1
[INFO] extracting crate simd_aligned 0.2.1 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/simd_aligned/0.2.1
[INFO] validating manifest of simd_aligned-0.2.1 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 simd_aligned-0.2.1 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 simd_aligned-0.2.1
[INFO] finished frobbing simd_aligned-0.2.1
[INFO] frobbed toml for simd_aligned-0.2.1 written to work/ex/beta-1.37-6/sources/1.36.0/reg/simd_aligned/0.2.1/Cargo.toml
[INFO] started frobbing simd_aligned-0.2.1
[INFO] finished frobbing simd_aligned-0.2.1
[INFO] frobbed toml for simd_aligned-0.2.1 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/simd_aligned/0.2.1/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 simd_aligned-0.2.1 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/simd_aligned/0.2.1:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] e3db837402542fbe937133bee6617af56d3af3a898dbc3c010d51c496c22185c
[INFO] running `"docker" "start" "-a" "e3db837402542fbe937133bee6617af56d3af3a898dbc3c010d51c496c22185c"`
[INFO] [stderr]    Compiling packed_simd v0.3.3
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/packed_simd-0.3.3/src/lib.rs:202:1
[INFO] [stderr]     |
[INFO] [stderr] 202 | / #![feature(
[INFO] [stderr] 203 | |     repr_simd,
[INFO] [stderr] 204 | |     const_fn,
[INFO] [stderr] 205 | |     platform_intrinsics,
[INFO] [stderr] ...   |
[INFO] [stderr] 215 | |     custom_inner_attributes
[INFO] [stderr] 216 | | )]
[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 `packed_simd`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "e3db837402542fbe937133bee6617af56d3af3a898dbc3c010d51c496c22185c"`
[INFO] running `"docker" "rm" "-f" "e3db837402542fbe937133bee6617af56d3af3a898dbc3c010d51c496c22185c"`
[INFO] [stdout] e3db837402542fbe937133bee6617af56d3af3a898dbc3c010d51c496c22185c