[INFO] updating cached repository JDrit/boyer_moore
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/JDrit/boyer_moore
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/JDrit/boyer_moore" "work/ex/beta-1.38-1/sources/1.37.0/gh/JDrit/boyer_moore"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/JDrit/boyer_moore'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/JDrit/boyer_moore" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/JDrit/boyer_moore"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/JDrit/boyer_moore'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d85f68df902e17bf1843b7db626d9e06c7851249
[INFO] sha for GitHub repo JDrit/boyer_moore: d85f68df902e17bf1843b7db626d9e06c7851249
[INFO] validating manifest of JDrit/boyer_moore 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 JDrit/boyer_moore 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 JDrit/boyer_moore
[INFO] finished frobbing JDrit/boyer_moore
[INFO] frobbed toml for JDrit/boyer_moore written to work/ex/beta-1.38-1/sources/1.37.0/gh/JDrit/boyer_moore/Cargo.toml
[INFO] started frobbing JDrit/boyer_moore
[INFO] finished frobbing JDrit/boyer_moore
[INFO] frobbed toml for JDrit/boyer_moore written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/JDrit/boyer_moore/Cargo.toml
[INFO] crate JDrit/boyer_moore 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 JDrit/boyer_moore 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-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/JDrit/boyer_moore:/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] e7b7d9dbce65018c454f3431258c0b53b55b26ec5aeec00b6e40c002420b6554
[INFO] running `"docker" "start" "-a" "e7b7d9dbce65018c454f3431258c0b53b55b26ec5aeec00b6e40c002420b6554"`
[INFO] [stderr]    Compiling boyer_moore v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0432]: unresolved import `std::io::Chars`
[INFO] [stderr]  --> src/search/search.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::io::Chars;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^ no `Chars` in `io`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(io)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::iter::Peekable`
[INFO] [stderr]  --> src/search/search.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::iter::Peekable;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/search/search.rs:237:52
[INFO] [stderr]     |
[INFO] [stderr] 237 | fn search_buffer(pattern_input: &str, buffer: &mut BufRead) -> Vec<usize> {
[INFO] [stderr]     |                                                    ^^^^^^^ help: use `dyn`: `dyn BufRead`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `chars` found for type `&mut dyn std::io::BufRead` in the current scope
[INFO] [stderr]    --> src/search/search.rs:240:28
[INFO] [stderr]     |
[INFO] [stderr] 240 |     let mut input = buffer.chars().map(|c| c.expect("decode failed"));
[INFO] [stderr]     |                            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]    --> src/search/search.rs:299:5
[INFO] [stderr]     |
[INFO] [stderr] 299 |     return results;
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unreachable_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0554, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: Could not compile `boyer_moore`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "e7b7d9dbce65018c454f3431258c0b53b55b26ec5aeec00b6e40c002420b6554"`
[INFO] running `"docker" "rm" "-f" "e7b7d9dbce65018c454f3431258c0b53b55b26ec5aeec00b6e40c002420b6554"`
[INFO] [stdout] e7b7d9dbce65018c454f3431258c0b53b55b26ec5aeec00b6e40c002420b6554