[INFO] updating cached repository gloriousfutureio/changes
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/gloriousfutureio/changes
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/gloriousfutureio/changes" "work/ex/beta-1.38-1/sources/1.37.0/gh/gloriousfutureio/changes"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/gloriousfutureio/changes'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/gloriousfutureio/changes" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/gloriousfutureio/changes"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/gloriousfutureio/changes'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c719c85d958e62bfec768d1db78cd763454a468a
[INFO] sha for GitHub repo gloriousfutureio/changes: c719c85d958e62bfec768d1db78cd763454a468a
[INFO] validating manifest of gloriousfutureio/changes 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 gloriousfutureio/changes 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 gloriousfutureio/changes
[INFO] finished frobbing gloriousfutureio/changes
[INFO] frobbed toml for gloriousfutureio/changes written to work/ex/beta-1.38-1/sources/1.37.0/gh/gloriousfutureio/changes/Cargo.toml
[INFO] started frobbing gloriousfutureio/changes
[INFO] finished frobbing gloriousfutureio/changes
[INFO] frobbed toml for gloriousfutureio/changes written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/gloriousfutureio/changes/Cargo.toml
[INFO] crate gloriousfutureio/changes 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 gloriousfutureio/changes 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-7/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/gloriousfutureio/changes:/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] 52c8f930fb757c6a3de7dfaf88fdffe0d03870a0da91c462f1d5f02b9fca123d
[INFO] running `"docker" "start" "-a" "52c8f930fb757c6a3de7dfaf88fdffe0d03870a0da91c462f1d5f02b9fca123d"`
[INFO] [stderr]    Compiling unicode-normalization v0.1.6
[INFO] [stderr]    Compiling serde v1.0.45
[INFO] [stderr]    Compiling openssl v0.10.7
[INFO] [stderr]    Compiling maud_htmlescape v0.17.0 (https://github.com/lfairy/maud.git#7c63fc13)
[INFO] [stderr]    Compiling literalext v0.1.1
[INFO] [stderr]    Compiling coco v0.2.1
[INFO] [stderr]    Compiling nom v3.2.1
[INFO] [stderr]    Compiling crossbeam-epoch v0.4.1
[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/literalext-0.1.1/src/lib.rs:19:37
[INFO] [stderr]    |
[INFO] [stderr] 19 | #![cfg_attr(feature = "proc-macro", feature(proc_macro))]
[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 `literalext`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "52c8f930fb757c6a3de7dfaf88fdffe0d03870a0da91c462f1d5f02b9fca123d"`
[INFO] running `"docker" "rm" "-f" "52c8f930fb757c6a3de7dfaf88fdffe0d03870a0da91c462f1d5f02b9fca123d"`
[INFO] [stdout] 52c8f930fb757c6a3de7dfaf88fdffe0d03870a0da91c462f1d5f02b9fca123d