[INFO] updating cached repository https://github.com/Farteen/rust-crates-playing
[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] 755edf2c1128cea4cf28c55bea660c8efc714f3f
[INFO] testing Farteen/rust-crates-playing against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFarteen%2Frust-crates-playing" "/workspace/builds/worker-8/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Farteen/rust-crates-playing 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/Farteen/rust-crates-playing
[INFO] finished tweaking git repo https://github.com/Farteen/rust-crates-playing
[INFO] tweaked toml for git repo https://github.com/Farteen/rust-crates-playing written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/Farteen/rust-crates-playing 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] a04779a8ffe612299128ff141aacc002dfa367fbe8c88c7bceda365d307bc402
[INFO] running `"docker" "start" "-a" "a04779a8ffe612299128ff141aacc002dfa367fbe8c88c7bceda365d307bc402"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]    Compiling libc v0.2.67
[INFO] [stderr]    Compiling futures-sink v0.3.4
[INFO] [stderr]    Compiling futures-core v0.3.4
[INFO] [stderr]    Compiling ring v0.16.11
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling aho-corasick v0.7.9
[INFO] [stderr]    Compiling derivative v1.0.3
[INFO] [stderr]    Compiling futures-channel v0.3.4
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling socket2 v0.3.11
[INFO] [stderr]    Compiling hostname v0.1.5
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]    Compiling backtrace v0.3.44
[INFO] [stderr]    Compiling resolv-conf v0.6.2
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling mio v0.6.21
[INFO] [stderr]    Compiling regex v1.3.4
[INFO] [stderr]    Compiling chrono v0.4.10
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling tokio v0.2.12
[INFO] [stderr]    Compiling pbkdf2 v0.3.0
[INFO] [stderr]    Compiling webpki v0.21.2
[INFO] [stderr]    Compiling sct v0.6.0
[INFO] [stderr]    Compiling webpki-roots v0.18.0
[INFO] [stderr]    Compiling rustls v0.16.0
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling rustversion v1.0.2
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]    Compiling async-trait v0.1.24
[INFO] [stderr]    Compiling enum-as-inner v0.3.1
[INFO] [stderr]    Compiling serde_with_macros v1.1.0
[INFO] [stderr]    Compiling proc-macro-error v0.4.9
[INFO] [stderr]    Compiling err-derive v0.2.2
[INFO] [stderr]    Compiling proc-macro-error-attr v0.4.9
[INFO] [stderr]    Compiling failure v0.1.6
[INFO] [stderr]    Compiling futures-macro v0.3.4
[INFO] [stderr]    Compiling futures-util v0.3.4
[INFO] [stderr]    Compiling futures-executor v0.3.4
[INFO] [stderr]    Compiling futures v0.3.4
[INFO] [stderr]    Compiling trust-dns-proto v0.18.1
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling trust-dns-resolver v0.18.1
[INFO] [stderr]    Compiling serde_json v1.0.48
[INFO] [stderr]    Compiling os_info v1.3.3
[INFO] [stderr]    Compiling serde_with v1.4.0
[INFO] [stderr]    Compiling bson v0.14.0
[INFO] [stderr]    Compiling mongodb v0.9.1
[INFO] [stderr]    Compiling toy v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: this file contains an unclosed delimiter
[INFO] [stderr]   --> src/main.rs:39:3
[INFO] [stderr]    |
[INFO] [stderr] 25 | fn main() -> Result<(), Box<dyn Error>> {
[INFO] [stderr]    |                                         - unclosed delimiter
[INFO] [stderr] ...
[INFO] [stderr] 36 |     for db_name in client.list_database_names(None)? {
[INFO] [stderr]    |                                                      - this delimiter might not be properly closed...
[INFO] [stderr] ...
[INFO] [stderr] 39 | }
[INFO] [stderr]    | - ^
[INFO] [stderr]    | |
[INFO] [stderr]    | ...as it matches this but it has different indentation
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Cursor`
[INFO] [stderr]  --> src/main.rs:1:47
[INFO] [stderr]   |
[INFO] [stderr] 1 | use mongodb::{Client, options::ClientOptions, Cursor};
[INFO] [stderr]   |                                               ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> src/main.rs:38:5
[INFO] [stderr]    |
[INFO] [stderr] 38 |     Ok(())
[INFO] [stderr]    |     ^^^^^^- help: try adding a semicolon: `;`
[INFO] [stderr]    |     |
[INFO] [stderr]    |     expected `()`, found enum `std::result::Result`
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected unit type `()`
[INFO] [stderr]                    found enum `std::result::Result<(), _>`
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> src/main.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |   fn main() -> Result<(), Box<dyn Error>> {
[INFO] [stderr]    |                -------------------------- expected `std::result::Result<(), std::boxed::Box<(dyn std::error::Error + 'static)>>` because of return type
[INFO] [stderr] ...
[INFO] [stderr] 36 | /     for db_name in client.list_database_names(None)? {
[INFO] [stderr] 37 | |         println!("{}", db_name);
[INFO] [stderr] 38 | |     Ok(())
[INFO] [stderr] 39 | | }
[INFO] [stderr]    | |_^ expected enum `std::result::Result`, found `()`
[INFO] [stderr]    |
[INFO] [stderr]    = note:   expected enum `std::result::Result<(), std::boxed::Box<(dyn std::error::Error + 'static)>>`
[INFO] [stderr]            found unit type `()`
[INFO] [stderr] help: try using a variant of the expected enum
[INFO] [stderr]    |
[INFO] [stderr] 36 |     serde::export::Ok(for db_name in client.list_database_names(None)? {
[INFO] [stderr] 37 |         println!("{}", db_name);
[INFO] [stderr] 38 |     Ok(())
[INFO] [stderr] 39 | })
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors; 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0308`.
[INFO] [stderr] error: could not compile `toy`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "a04779a8ffe612299128ff141aacc002dfa367fbe8c88c7bceda365d307bc402"`
[INFO] running `"docker" "rm" "-f" "a04779a8ffe612299128ff141aacc002dfa367fbe8c88c7bceda365d307bc402"`
[INFO] [stdout] a04779a8ffe612299128ff141aacc002dfa367fbe8c88c7bceda365d307bc402