[INFO] updating cached repository TrueDoughnut/Rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/TrueDoughnut/Rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/TrueDoughnut/Rust" "work/ex/beta-1.38-1/sources/1.37.0/gh/TrueDoughnut/Rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/TrueDoughnut/Rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/TrueDoughnut/Rust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/TrueDoughnut/Rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/TrueDoughnut/Rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] fc3009ddc8edd3f99dd24cc5f7aca5ca24012b92
[INFO] sha for GitHub repo TrueDoughnut/Rust: fc3009ddc8edd3f99dd24cc5f7aca5ca24012b92
[INFO] validating manifest of TrueDoughnut/Rust 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 TrueDoughnut/Rust 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 TrueDoughnut/Rust
[INFO] finished frobbing TrueDoughnut/Rust
[INFO] frobbed toml for TrueDoughnut/Rust written to work/ex/beta-1.38-1/sources/1.37.0/gh/TrueDoughnut/Rust/Cargo.toml
[INFO] started frobbing TrueDoughnut/Rust
[INFO] finished frobbing TrueDoughnut/Rust
[INFO] frobbed toml for TrueDoughnut/Rust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/TrueDoughnut/Rust/Cargo.toml
[INFO] crate TrueDoughnut/Rust 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 TrueDoughnut/Rust against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/TrueDoughnut/Rust:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 595e1ae625ec876fab7f451a0db42c15fabac13a2822fa3fa81ee55ce6149245
[INFO] running `"docker" "start" "-a" "595e1ae625ec876fab7f451a0db42c15fabac13a2822fa3fa81ee55ce6149245"`
[INFO] [stderr]    Compiling rand v0.6.0
[INFO] [stderr]    Compiling Rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0502]: cannot borrow `entered` as mutable because it is also borrowed as immutable
[INFO] [stderr]   --> src/collections/company.rs:13:31
[INFO] [stderr]    |
[INFO] [stderr] 13 |         io::stdin().read_line(&mut entered)
[INFO] [stderr]    |                               ^^^^^^^^^^^^ mutable borrow occurs here
[INFO] [stderr] ...
[INFO] [stderr] 16 |         let vec: Vec<&str> = entered.split(" ").collect();
[INFO] [stderr]    |                              ------- immutable borrow occurs here
[INFO] [stderr] ...
[INFO] [stderr] 25 |             if map.contains_key(last) {
[INFO] [stderr]    |                --- immutable borrow later used here
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0502`.
[INFO] [stderr] error: Could not compile `Rust`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "595e1ae625ec876fab7f451a0db42c15fabac13a2822fa3fa81ee55ce6149245"`
[INFO] running `"docker" "rm" "-f" "595e1ae625ec876fab7f451a0db42c15fabac13a2822fa3fa81ee55ce6149245"`
[INFO] [stdout] 595e1ae625ec876fab7f451a0db42c15fabac13a2822fa3fa81ee55ce6149245