[INFO] updating cached repository Machtan/token-rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Machtan/token-rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Machtan/token-rs" "work/ex/beta-1.38-1/sources/1.37.0/gh/Machtan/token-rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Machtan/token-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Machtan/token-rs" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Machtan/token-rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Machtan/token-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9b6f91edb12a582c8c52974fd381fc03d530eacb
[INFO] sha for GitHub repo Machtan/token-rs: 9b6f91edb12a582c8c52974fd381fc03d530eacb
[INFO] validating manifest of Machtan/token-rs 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 Machtan/token-rs 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 Machtan/token-rs
[INFO] finished frobbing Machtan/token-rs
[INFO] frobbed toml for Machtan/token-rs written to work/ex/beta-1.38-1/sources/1.37.0/gh/Machtan/token-rs/Cargo.toml
[INFO] started frobbing Machtan/token-rs
[INFO] finished frobbing Machtan/token-rs
[INFO] frobbed toml for Machtan/token-rs written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Machtan/token-rs/Cargo.toml
[INFO] crate Machtan/token-rs 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 Machtan/token-rs 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-0/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/Machtan/token-rs:/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] ec896123531cbf6ee2fb59dd008d3fee974bcd052fa56ae53481b4b90b02ce96
[INFO] running `"docker" "start" "-a" "ec896123531cbf6ee2fb59dd008d3fee974bcd052fa56ae53481b4b90b02ce96"`
[INFO] [stderr]    Compiling token v1.0.0-rc2 (/opt/crater/workdir)
[INFO] [stderr] error[E0412]: cannot find type `Chars` in module `io`
[INFO] [stderr]   --> src/lib.rs:38:16
[INFO] [stderr]    |
[INFO] [stderr] 38 |     chars: io::Chars<R>,
[INFO] [stderr]    |                ^^^^^ not found in `io`
[INFO] [stderr] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]    |
[INFO] [stderr] 30 | use std::str::Chars;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `CharsError` in module `io`
[INFO] [stderr]   --> src/lib.rs:62:56
[INFO] [stderr]    |
[INFO] [stderr] 62 |     pub fn next(&mut self) -> Result<Option<&str>, io::CharsError> {
[INFO] [stderr]    |                                                        ^^^^^^^^^^ not found in `io`
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `CharsError` in module `io`
[INFO] [stderr]    --> src/lib.rs:130:56
[INFO] [stderr]     |
[INFO] [stderr] 130 |     pub fn next(&mut self) -> Result<Option<&str>, io::CharsError> {
[INFO] [stderr]     |                                                        ^^^^^^^^^^ not found in `io`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> src/lib.rs:28:1
[INFO] [stderr]    |
[INFO] [stderr] 28 | #![feature(io)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0392]: parameter `R` is never used
[INFO] [stderr]   --> src/lib.rs:86:33
[INFO] [stderr]    |
[INFO] [stderr] 86 | pub struct SentenceSplitter<'a, R: Read> {
[INFO] [stderr]    |                                 ^ unused parameter
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider removing `R` or using a marker such as `std::marker::PhantomData`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 5 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0392, E0412, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0392`.
[INFO] [stderr] error: Could not compile `token`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "ec896123531cbf6ee2fb59dd008d3fee974bcd052fa56ae53481b4b90b02ce96"`
[INFO] running `"docker" "rm" "-f" "ec896123531cbf6ee2fb59dd008d3fee974bcd052fa56ae53481b4b90b02ce96"`
[INFO] [stdout] ec896123531cbf6ee2fb59dd008d3fee974bcd052fa56ae53481b4b90b02ce96