[INFO] crate time-tweet 0.1.9 is already in cache
[INFO] extracting crate time-tweet 0.1.9 into work/ex/beta-1.37-6/sources/1.36.0/reg/time-tweet/0.1.9
[INFO] extracting crate time-tweet 0.1.9 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/time-tweet/0.1.9
[INFO] validating manifest of time-tweet-0.1.9 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 time-tweet-0.1.9 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 time-tweet-0.1.9
[INFO] finished frobbing time-tweet-0.1.9
[INFO] frobbed toml for time-tweet-0.1.9 written to work/ex/beta-1.37-6/sources/1.36.0/reg/time-tweet/0.1.9/Cargo.toml
[INFO] started frobbing time-tweet-0.1.9
[INFO] finished frobbing time-tweet-0.1.9
[INFO] frobbed toml for time-tweet-0.1.9 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/time-tweet/0.1.9/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 time-tweet-0.1.9 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-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/time-tweet/0.1.9:/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] 3e6d40a254bc9c99833dfa34f09276f394c0c7ce0aee62e505ce446a71c0ea9a
[INFO] running `"docker" "start" "-a" "3e6d40a254bc9c99833dfa34f09276f394c0c7ce0aee62e505ce446a71c0ea9a"`
[INFO] [stderr]    Compiling iter-merge-sort v0.1.2
[INFO] [stderr]    Compiling generic-array v0.8.3
[INFO] [stderr]    Compiling error-chain v0.10.0
[INFO] [stderr]    Compiling hyper-tls v0.1.4
[INFO] [stderr]    Compiling crypto-mac v0.4.0
[INFO] [stderr]    Compiling digest v0.6.2
[INFO] [stderr]    Compiling hmac v0.4.2
[INFO] [stderr]    Compiling sha-1 v0.4.1
[INFO] [stderr]    Compiling cron-bugfix-version v0.4.0
[INFO] [stderr] error[E0432]: unresolved import `std::collections::range`
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/cron-bugfix-version-0.4.0/src/time_unit/mod.rs:18:23
[INFO] [stderr]    |
[INFO] [stderr] 18 | use std::collections::range::{RangeArgument};
[INFO] [stderr]    |                       ^^^^^ could not find `range` in `collections`
[INFO] [stderr] 
[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/cron-bugfix-version-0.4.0/src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(collections_range)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[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/cron-bugfix-version-0.4.0/src/lib.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(conservative_impl_trait)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[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/cron-bugfix-version-0.4.0/src/lib.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | #![feature(iterator_step_by)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: Could not compile `cron-bugfix-version`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "3e6d40a254bc9c99833dfa34f09276f394c0c7ce0aee62e505ce446a71c0ea9a"`
[INFO] running `"docker" "rm" "-f" "3e6d40a254bc9c99833dfa34f09276f394c0c7ce0aee62e505ce446a71c0ea9a"`
[INFO] [stdout] 3e6d40a254bc9c99833dfa34f09276f394c0c7ce0aee62e505ce446a71c0ea9a