[INFO] updating cached repository Mark-Simulacrum/advent-of-code
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Mark-Simulacrum/advent-of-code
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Mark-Simulacrum/advent-of-code" "work/ex/beta-1.37-6/sources/1.36.0/gh/Mark-Simulacrum/advent-of-code"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/Mark-Simulacrum/advent-of-code'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Mark-Simulacrum/advent-of-code" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Mark-Simulacrum/advent-of-code"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Mark-Simulacrum/advent-of-code'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2179769a0a115d48c6616e25a41c6de0a189cd9d
[INFO] sha for GitHub repo Mark-Simulacrum/advent-of-code: 2179769a0a115d48c6616e25a41c6de0a189cd9d
[INFO] validating manifest of Mark-Simulacrum/advent-of-code 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 Mark-Simulacrum/advent-of-code 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 Mark-Simulacrum/advent-of-code
[INFO] removed workspace from Mark-Simulacrum/advent-of-code
[INFO] finished frobbing Mark-Simulacrum/advent-of-code
[INFO] frobbed toml for Mark-Simulacrum/advent-of-code written to work/ex/beta-1.37-6/sources/1.36.0/gh/Mark-Simulacrum/advent-of-code/Cargo.toml
[INFO] started frobbing Mark-Simulacrum/advent-of-code
[INFO] removed workspace from Mark-Simulacrum/advent-of-code
[INFO] finished frobbing Mark-Simulacrum/advent-of-code
[INFO] frobbed toml for Mark-Simulacrum/advent-of-code written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Mark-Simulacrum/advent-of-code/Cargo.toml
[INFO] crate Mark-Simulacrum/advent-of-code already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/Mark-Simulacrum/advent-of-code/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[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 Mark-Simulacrum/advent-of-code against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Mark-Simulacrum/advent-of-code:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 036b4847e8418554621b7630af53f4b80ca49d42560ada54d7503d55f48ae25a
[INFO] running `"docker" "start" "-a" "036b4847e8418554621b7630af53f4b80ca49d42560ada54d7503d55f48ae25a"`
[INFO] [stderr]    Compiling hamming v0.1.3
[INFO] [stderr]    Compiling packed_simd v0.3.3
[INFO] [stderr]    Compiling primal-estimate v0.2.1
[INFO] [stderr]    Compiling permutohedron v0.2.4
[INFO] [stderr]    Compiling rand_core v0.2.2
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling env_logger v0.5.13
[INFO] [stderr]    Compiling primal-bit v0.2.4
[INFO] [stderr]    Compiling primal-sieve v0.2.9
[INFO] [stderr]    Compiling primal-check v0.2.3
[INFO] [stderr]    Compiling quickcheck v0.7.2
[INFO] [stderr]    Compiling primal v0.2.3
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta 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" "036b4847e8418554621b7630af53f4b80ca49d42560ada54d7503d55f48ae25a"`
[INFO] running `"docker" "rm" "-f" "036b4847e8418554621b7630af53f4b80ca49d42560ada54d7503d55f48ae25a"`
[INFO] [stdout] 036b4847e8418554621b7630af53f4b80ca49d42560ada54d7503d55f48ae25a