[INFO] updating cached repository TheJakeSchmidt/wikipedia-minus-wikipedians
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/TheJakeSchmidt/wikipedia-minus-wikipedians
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/TheJakeSchmidt/wikipedia-minus-wikipedians" "work/ex/beta-1.38-1/sources/1.37.0/gh/TheJakeSchmidt/wikipedia-minus-wikipedians"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/TheJakeSchmidt/wikipedia-minus-wikipedians'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/TheJakeSchmidt/wikipedia-minus-wikipedians" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/TheJakeSchmidt/wikipedia-minus-wikipedians"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/TheJakeSchmidt/wikipedia-minus-wikipedians'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 60410fa53241a78411821b7d76fb9ba9488043bf
[INFO] sha for GitHub repo TheJakeSchmidt/wikipedia-minus-wikipedians: 60410fa53241a78411821b7d76fb9ba9488043bf
[INFO] validating manifest of TheJakeSchmidt/wikipedia-minus-wikipedians 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 TheJakeSchmidt/wikipedia-minus-wikipedians 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 TheJakeSchmidt/wikipedia-minus-wikipedians
[INFO] finished frobbing TheJakeSchmidt/wikipedia-minus-wikipedians
[INFO] frobbed toml for TheJakeSchmidt/wikipedia-minus-wikipedians written to work/ex/beta-1.38-1/sources/1.37.0/gh/TheJakeSchmidt/wikipedia-minus-wikipedians/Cargo.toml
[INFO] started frobbing TheJakeSchmidt/wikipedia-minus-wikipedians
[INFO] finished frobbing TheJakeSchmidt/wikipedia-minus-wikipedians
[INFO] frobbed toml for TheJakeSchmidt/wikipedia-minus-wikipedians written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/TheJakeSchmidt/wikipedia-minus-wikipedians/Cargo.toml
[INFO] crate TheJakeSchmidt/wikipedia-minus-wikipedians 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] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/TheJakeSchmidt/wikipedia-minus-wikipedians/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" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 TheJakeSchmidt/wikipedia-minus-wikipedians against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/TheJakeSchmidt/wikipedia-minus-wikipedians:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] dced13111286f25e12e7d38ae7bde8c8cb37891a3f8975020ba61642a6bfda00
[INFO] running `"docker" "start" "-a" "dced13111286f25e12e7d38ae7bde8c8cb37891a3f8975020ba61642a6bfda00"`
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling new_debug_unreachable v1.0.3
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling rc v0.1.1
[INFO] [stderr]    Compiling ascii v0.9.2
[INFO] [stderr]    Compiling percent-encoding v2.1.0
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling num-rational v0.2.2
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling futf v0.1.4
[INFO] [stderr]    Compiling idna v0.2.0
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling getrandom v0.1.10
[INFO] [stderr]    Compiling thread-id v3.3.0
[INFO] [stderr]    Compiling hyper v0.12.33
[INFO] [stderr]    Compiling serde_yaml v0.8.9
[INFO] [stderr]    Compiling futures-cpupool v0.1.8
[INFO] [stderr]    Compiling tendril v0.1.6
[INFO] [stderr]    Compiling tendril v0.4.1
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling rand_core v0.5.0
[INFO] [stderr]    Compiling tempfile v1.1.3
[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/regex-0.2.11/src/lib.rs:522:34
[INFO] [stderr]     |
[INFO] [stderr] 522 | #![cfg_attr(feature = "pattern", feature(pattern))]
[INFO] [stderr]     |                                  ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]    Compiling combine v3.8.1
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]    Compiling mio v0.6.19
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling want v0.2.0
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `regex`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "dced13111286f25e12e7d38ae7bde8c8cb37891a3f8975020ba61642a6bfda00"`
[INFO] running `"docker" "rm" "-f" "dced13111286f25e12e7d38ae7bde8c8cb37891a3f8975020ba61642a6bfda00"`
[INFO] [stdout] dced13111286f25e12e7d38ae7bde8c8cb37891a3f8975020ba61642a6bfda00