[INFO] updating cached repository steveklabnik/doxidize
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/steveklabnik/doxidize
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/steveklabnik/doxidize" "work/ex/beta-1.38-1/sources/1.37.0/gh/steveklabnik/doxidize"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/steveklabnik/doxidize'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/steveklabnik/doxidize" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/steveklabnik/doxidize"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/steveklabnik/doxidize'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c0cd9fce983a16187cdf54b6489cf86bfe8b21c9
[INFO] sha for GitHub repo steveklabnik/doxidize: c0cd9fce983a16187cdf54b6489cf86bfe8b21c9
[INFO] validating manifest of steveklabnik/doxidize 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 steveklabnik/doxidize 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 steveklabnik/doxidize
[INFO] finished frobbing steveklabnik/doxidize
[INFO] frobbed toml for steveklabnik/doxidize written to work/ex/beta-1.38-1/sources/1.37.0/gh/steveklabnik/doxidize/Cargo.toml
[INFO] started frobbing steveklabnik/doxidize
[INFO] finished frobbing steveklabnik/doxidize
[INFO] frobbed toml for steveklabnik/doxidize written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/steveklabnik/doxidize/Cargo.toml
[INFO] crate steveklabnik/doxidize already has a lockfile, it will not be regenerated
[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 steveklabnik/doxidize 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-1/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/steveklabnik/doxidize:/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] 6305531e1e8e7631280472d64ba502da9fbd225385bde579e3bc3a226bbedc8f
[INFO] running `"docker" "start" "-a" "6305531e1e8e7631280472d64ba502da9fbd225385bde579e3bc3a226bbedc8f"`
[INFO] [stderr]    Compiling pest v1.0.3
[INFO] [stderr]    Compiling nibble_vec v0.0.3
[INFO] [stderr]    Compiling typed-arena v1.3.0
[INFO] [stderr]    Compiling slog v2.2.3
[INFO] [stderr]    Compiling entities v1.0.0
[INFO] [stderr]    Compiling unicode_categories v0.1.1
[INFO] [stderr]    Compiling take_mut v0.2.0
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling inotify v0.3.0
[INFO] [stderr]    Compiling net2 v0.2.31
[INFO] [stderr]    Compiling filetime v0.1.15
[INFO] [stderr]    Compiling rls-span v0.4.0
[INFO] [stderr]    Compiling nix v0.5.1
[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/rls-span-0.4.0/src/lib.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | #![feature(proc_macro)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]    Compiling combine v3.0.0-alpha.2
[INFO] [stderr]    Compiling nix v0.9.0
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr]    Compiling erased-serde v0.3.3
[INFO] [stderr] error: Could not compile `rls-span`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "6305531e1e8e7631280472d64ba502da9fbd225385bde579e3bc3a226bbedc8f"`
[INFO] running `"docker" "rm" "-f" "6305531e1e8e7631280472d64ba502da9fbd225385bde579e3bc3a226bbedc8f"`
[INFO] [stdout] 6305531e1e8e7631280472d64ba502da9fbd225385bde579e3bc3a226bbedc8f