[INFO] updating cached repository https://github.com/utkarshkukreti/pipette
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 868323ee9c6776157b798cd7582493020f963027
[INFO] testing utkarshkukreti/pipette against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Futkarshkukreti%2Fpipette" "work/builds/worker-1/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/utkarshkukreti/pipette on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/utkarshkukreti/pipette
[INFO] finished tweaking git repo https://github.com/utkarshkukreti/pipette
[INFO] tweaked toml for git repo https://github.com/utkarshkukreti/pipette written to work/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/utkarshkukreti/pipette already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] 3869b3ddb89f9c9fbe33064f8977a75a1f2c7a17421448a92fed1298bb6e1b50
[INFO] running `"docker" "start" "-a" "3869b3ddb89f9c9fbe33064f8977a75a1f2c7a17421448a92fed1298bb6e1b50"`
[INFO] [stderr]    Compiling pipette v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0412]: cannot find type `Chars` in module `io`
[INFO] [stderr]  --> src/reader.rs:4:16
[INFO] [stderr]   |
[INFO] [stderr] 4 |     inner: 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] 1 | use std::str::Chars;
[INFO] [stderr]   |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `CharsError` in module `io`
[INFO] [stderr]   --> src/reader.rs:28:54
[INFO] [stderr]    |
[INFO] [stderr] 28 |     pub fn read(&mut self) -> Option<Result<Key, io::CharsError>> {
[INFO] [stderr]    |                                                      ^^^^^^^^^^ not found in `io`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(io)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]   --> src/reader.rs:42:23
[INFO] [stderr]    |
[INFO] [stderr] 42 |                     0 ... 31 => Other,
[INFO] [stderr]    |                       ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0392]: parameter `R` is never used
[INFO] [stderr]  --> src/pipette.rs:5:20
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub struct Pipette<R: io::Read, W: io::Write> {
[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 4 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 `pipette`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "3869b3ddb89f9c9fbe33064f8977a75a1f2c7a17421448a92fed1298bb6e1b50"`
[INFO] running `"docker" "rm" "-f" "3869b3ddb89f9c9fbe33064f8977a75a1f2c7a17421448a92fed1298bb6e1b50"`
[INFO] [stdout] 3869b3ddb89f9c9fbe33064f8977a75a1f2c7a17421448a92fed1298bb6e1b50