[INFO] updating cached repository athenanike/slack-history
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/athenanike/slack-history
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/athenanike/slack-history" "work/ex/beta-1.38-1/sources/1.37.0/gh/athenanike/slack-history"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/athenanike/slack-history'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/athenanike/slack-history" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/athenanike/slack-history"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/athenanike/slack-history'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f6643555a54b6a1823e979bdfd199963a1e8af2e
[INFO] sha for GitHub repo athenanike/slack-history: f6643555a54b6a1823e979bdfd199963a1e8af2e
[INFO] validating manifest of athenanike/slack-history 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 athenanike/slack-history 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 athenanike/slack-history
[INFO] finished frobbing athenanike/slack-history
[INFO] frobbed toml for athenanike/slack-history written to work/ex/beta-1.38-1/sources/1.37.0/gh/athenanike/slack-history/Cargo.toml
[INFO] started frobbing athenanike/slack-history
[INFO] finished frobbing athenanike/slack-history
[INFO] frobbed toml for athenanike/slack-history written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/athenanike/slack-history/Cargo.toml
[INFO] crate athenanike/slack-history 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/athenanike/slack-history/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[INFO] the lockfile is outdated, regenerating it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 athenanike/slack-history 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-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/athenanike/slack-history:/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] a04e5d9661b270396022cc38a9dffb4c577b6b3d1989c7be638fbbb54ed66586
[INFO] running `"docker" "start" "-a" "a04e5d9661b270396022cc38a9dffb4c577b6b3d1989c7be638fbbb54ed66586"`
[INFO] [stderr]    Compiling curl-sys v0.1.35
[INFO] [stderr]    Compiling rust-ini v0.5.1
[INFO] [stderr] error[E0412]: cannot find type `Chars` in module `io`
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/rust-ini-0.5.1/src/ini.rs:339:14
[INFO] [stderr]     |
[INFO] [stderr] 339 |     rdr: 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] 22  | use std::str::Chars;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Chars` in module `io`
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/rust-ini-0.5.1/src/ini.rs:358:25
[INFO] [stderr]     |
[INFO] [stderr] 358 |     pub fn new(rdr: io::Chars<R>) -> Parser<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] 22  | use std::str::Chars;
[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/rust-ini-0.5.1/src/lib.rs:48:1
[INFO] [stderr]    |
[INFO] [stderr] 48 | #![feature(io)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `chars` found for type `std::io::BufReader<std::io::Cursor<std::vec::Vec<u8>>>` in the current scope
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/rust-ini-0.5.1/src/ini.rs:280:48
[INFO] [stderr]     |
[INFO] [stderr] 280 |         let mut parser = Parser::new(bufreader.chars());
[INFO] [stderr]     |                                                ^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `chars` found for type `std::io::BufReader<&mut dyn std::io::Read>` in the current scope
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/rust-ini-0.5.1/src/ini.rs:286:43
[INFO] [stderr]     |
[INFO] [stderr] 286 |         let mut parser = Parser::new(bufr.chars());
[INFO] [stderr]     |                                           ^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 5 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0412, E0554, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0412`.
[INFO] [stderr] error: Could not compile `rust-ini`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "a04e5d9661b270396022cc38a9dffb4c577b6b3d1989c7be638fbbb54ed66586"`
[INFO] running `"docker" "rm" "-f" "a04e5d9661b270396022cc38a9dffb4c577b6b3d1989c7be638fbbb54ed66586"`
[INFO] [stdout] a04e5d9661b270396022cc38a9dffb4c577b6b3d1989c7be638fbbb54ed66586