[INFO] updating cached repository https://github.com/archer884/vchk
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/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] a0cfd9061ebad437378fabd298698aa89784daf7
[INFO] testing archer884/vchk against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farcher884%2Fvchk" "/workspace/builds/worker-5/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/archer884/vchk on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/archer884/vchk
[INFO] finished tweaking git repo https://github.com/archer884/vchk
[INFO] tweaked toml for git repo https://github.com/archer884/vchk written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/archer884/vchk already has a lockfile, it will not be regenerated
[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-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] eedb8e3d5590485a462648229f7b0cb50e0e90b532ca93dd3aaae15d79e2f294
[INFO] running `"docker" "start" "-a" "eedb8e3d5590485a462648229f7b0cb50e0e90b532ca93dd3aaae15d79e2f294"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling vchk v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0432]: unresolved import `std::io::BufReadExt`
[INFO] [stderr]  --> src/main.rs:7:26
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::io::{BufReader, BufReadExt};
[INFO] [stderr]   |                          ^^^^^^^^^^
[INFO] [stderr]   |                          |
[INFO] [stderr]   |                          no `BufReadExt` in `io`
[INFO] [stderr]   |                          help: a similar name exists in the module: `BufRead`
[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(box_syntax, env, fs, io, path)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:24:27
[INFO] [stderr]    |
[INFO] [stderr] 24 | fn print_count(words: Box<Iterator<Item=VWord>>) {
[INFO] [stderr]    |                           ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=VWord>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:28:27
[INFO] [stderr]    |
[INFO] [stderr] 28 | fn print_words(words: Box<Iterator<Item=VWord>>) {
[INFO] [stderr]    |                           ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=VWord>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:34:44
[INFO] [stderr]    |
[INFO] [stderr] 34 | fn get_words<'a>(req_ordered: bool) -> Box<Iterator<Item=VWord> + 'a> {
[INFO] [stderr]    |                                            ^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=VWord> + 'a`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `lines` found for struct `std::io::BufReader<std::fs::File>` in the current scope
[INFO] [stderr]     --> src/main.rs:36:10
[INFO] [stderr]      |
[INFO] [stderr] 36   |         .lines()
[INFO] [stderr]      |          ^^^^^ method not found in `std::io::BufReader<std::fs::File>`
[INFO] [stderr]      |
[INFO] [stderr]      = help: items from traits can only be used if the trait is in scope
[INFO] [stderr] help: the following trait is implemented but not in scope; perhaps add a `use` for it:
[INFO] [stderr]      |
[INFO] [stderr] 4    | use std::io::BufRead;
[INFO] [stderr]      |
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors; 3 warnings emitted
[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 `vchk`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "eedb8e3d5590485a462648229f7b0cb50e0e90b532ca93dd3aaae15d79e2f294"`
[INFO] running `"docker" "rm" "-f" "eedb8e3d5590485a462648229f7b0cb50e0e90b532ca93dd3aaae15d79e2f294"`
[INFO] [stdout] eedb8e3d5590485a462648229f7b0cb50e0e90b532ca93dd3aaae15d79e2f294