[INFO] crate token 1.0.0-rc1 is already in cache
[INFO] testing token-1.0.0-rc1 against 1.44.0 for beta-1.45-1
[INFO] extracting crate token 1.0.0-rc1 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate token 1.0.0-rc1 on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate token 1.0.0-rc1
[INFO] finished tweaking crates.io crate token 1.0.0-rc1
[INFO] tweaked toml for crates.io crate token 1.0.0-rc1 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-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" "+1.44.0" "build" "--frozen"`
[INFO] [stdout] eee6a680e70af16e502fb4cae71003812dcf515c1c6cb058b50a2da993b7c00d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "eee6a680e70af16e502fb4cae71003812dcf515c1c6cb058b50a2da993b7c00d"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling token v1.0.0-rc1 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0432]: unresolved import `std::io::ReadExt`
[INFO] [stderr]   --> src/lib.rs:50:21
[INFO] [stderr]    |
[INFO] [stderr] 50 | use std::io::{Read, ReadExt};
[INFO] [stderr]    |                     ^^^^^^^ no `ReadExt` in `io`
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Chars` in module `io`
[INFO] [stderr]   --> src/lib.rs:57:16
[INFO] [stderr]    |
[INFO] [stderr] 57 |     chars: io::Chars<R>,
[INFO] [stderr]    |                ^^^^^ not found in `io`
[INFO] [stderr]    |
[INFO] [stderr] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]    |
[INFO] [stderr] 47 | use std::str::Chars;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `CharsError` in module `io`
[INFO] [stderr]   --> src/lib.rs:83:37
[INFO] [stderr]    |
[INFO] [stderr] 83 |     type Item = Result<&'a 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:87:51
[INFO] [stderr]    |
[INFO] [stderr] 87 |     fn next(&mut self) -> Option<Result<&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:175:37
[INFO] [stderr]     |
[INFO] [stderr] 175 |     type Item = Result<&'b 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:178:51
[INFO] [stderr]     |
[INFO] [stderr] 178 |     fn next(&mut self) -> Option<Result<&str, 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/lib.rs:45:1
[INFO] [stderr]    |
[INFO] [stderr] 45 | #![feature(core)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]   --> src/lib.rs:46:1
[INFO] [stderr]    |
[INFO] [stderr] 46 | #![feature(io)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0207]: the lifetime parameter `'a` is not constrained by the impl trait, self type, or predicates
[INFO] [stderr]   --> src/lib.rs:82:6
[INFO] [stderr]    |
[INFO] [stderr] 82 | impl<'a, R: Read> Iterator for Tokenizer<R> {
[INFO] [stderr]    |      ^^ unconstrained lifetime parameter
[INFO] [stderr] 
[INFO] [stderr] error[E0207]: the lifetime parameter `'b` is not constrained by the impl trait, self type, or predicates
[INFO] [stderr]    --> src/lib.rs:174:11
[INFO] [stderr]     |
[INFO] [stderr] 174 | impl <'a, 'b, R: Read> Iterator for SentenceSplitter<'a, R> {
[INFO] [stderr]     |           ^^ unconstrained lifetime parameter
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 10 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0207, E0412, E0432, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0207`.
[INFO] [stderr] error: could not compile `token`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "eee6a680e70af16e502fb4cae71003812dcf515c1c6cb058b50a2da993b7c00d"`
[INFO] running `"docker" "rm" "-f" "eee6a680e70af16e502fb4cae71003812dcf515c1c6cb058b50a2da993b7c00d"`
[INFO] [stdout] eee6a680e70af16e502fb4cae71003812dcf515c1c6cb058b50a2da993b7c00d