[INFO] updating cached repository darthlukan/lynea
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/darthlukan/lynea
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/darthlukan/lynea" "work/ex/beta-1.38-1/sources/1.37.0/gh/darthlukan/lynea"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/darthlukan/lynea'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/darthlukan/lynea" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/darthlukan/lynea"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/darthlukan/lynea'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] acf4f1e9e479d9abb495b22461d58d58e39893d6
[INFO] sha for GitHub repo darthlukan/lynea: acf4f1e9e479d9abb495b22461d58d58e39893d6
[INFO] validating manifest of darthlukan/lynea 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 darthlukan/lynea 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 darthlukan/lynea
[INFO] finished frobbing darthlukan/lynea
[INFO] frobbed toml for darthlukan/lynea written to work/ex/beta-1.38-1/sources/1.37.0/gh/darthlukan/lynea/Cargo.toml
[INFO] started frobbing darthlukan/lynea
[INFO] finished frobbing darthlukan/lynea
[INFO] frobbed toml for darthlukan/lynea written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/darthlukan/lynea/Cargo.toml
[INFO] crate darthlukan/lynea 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 darthlukan/lynea 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-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/darthlukan/lynea:/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] 96edd8d54aba3922ace1173a2bba550bc22bfbe3a56ac2889cfd9015478a624a
[INFO] running `"docker" "start" "-a" "96edd8d54aba3922ace1173a2bba550bc22bfbe3a56ac2889cfd9015478a624a"`
[INFO] [stderr]    Compiling lynea v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0433]: failed to resolve: maybe a missing `extern crate core;`?
[INFO] [stderr]  --> src/main.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use core::str::Lines;
[INFO] [stderr]   |     ^^^^ maybe a missing `extern crate core;`?
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::path::Path`
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::path::Path;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `core::str::Lines`
[INFO] [stderr]  --> src/main.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use core::str::Lines;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `lines` found for type `std::fs::File` in the current scope
[INFO] [stderr]   --> src/main.rs:22:34
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let mut lines: Vec<_> = file.lines();
[INFO] [stderr]    |                                  ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: the method `lines` exists but the following trait bounds were not satisfied:
[INFO] [stderr]            `&mut std::fs::File : std::io::BufRead`
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> src/main.rs:44:16
[INFO] [stderr]    |
[INFO] [stderr] 41 | fn main() {
[INFO] [stderr]    |           - expected `()` because of default return type
[INFO] [stderr] ...
[INFO] [stderr] 44 |         return false;
[INFO] [stderr]    |                ^^^^^ expected (), found bool
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `()`
[INFO] [stderr]               found type `bool`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::prelude`
[INFO] [stderr]  --> src/main.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::io::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0308, E0433, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0308`.
[INFO] [stderr] error: Could not compile `lynea`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "96edd8d54aba3922ace1173a2bba550bc22bfbe3a56ac2889cfd9015478a624a"`
[INFO] running `"docker" "rm" "-f" "96edd8d54aba3922ace1173a2bba550bc22bfbe3a56ac2889cfd9015478a624a"`
[INFO] [stdout] 96edd8d54aba3922ace1173a2bba550bc22bfbe3a56ac2889cfd9015478a624a