[INFO] cloning repository https://github.com/TrueDoughnut/Rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/TrueDoughnut/Rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTrueDoughnut%2FRust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTrueDoughnut%2FRust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fc3009ddc8edd3f99dd24cc5f7aca5ca24012b92
[INFO] checking TrueDoughnut/Rust against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTrueDoughnut%2FRust" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/TrueDoughnut/Rust on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/TrueDoughnut/Rust
[INFO] finished tweaking git repo https://github.com/TrueDoughnut/Rust
[INFO] tweaked toml for git repo https://github.com/TrueDoughnut/Rust written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/TrueDoughnut/Rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b1896179aeb963ba1e9c56b2d7c6b8c6ce43114897f4111c21c2579ddf6a6ced
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b1896179aeb963ba1e9c56b2d7c6b8c6ce43114897f4111c21c2579ddf6a6ced", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b1896179aeb963ba1e9c56b2d7c6b8c6ce43114897f4111c21c2579ddf6a6ced", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b1896179aeb963ba1e9c56b2d7c6b8c6ce43114897f4111c21c2579ddf6a6ced", kill_on_drop: false }`
[INFO] [stdout] b1896179aeb963ba1e9c56b2d7c6b8c6ce43114897f4111c21c2579ddf6a6ced
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6909a49481e8a6af81a29fd3cbbc2f9500962795d861a6596b2c4d9043dbea28
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "6909a49481e8a6af81a29fd3cbbc2f9500962795d861a6596b2c4d9043dbea28", kill_on_drop: false }`
[INFO] [stderr]     Checking rand_core v0.3.0
[INFO] [stderr]     Checking libc v0.2.43
[INFO] [stderr]    Compiling rand_pcg v0.1.1
[INFO] [stderr]    Compiling rand_chacha v0.1.0
[INFO] [stderr]    Compiling rand v0.6.0
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_isaac v0.1.0
[INFO] [stderr]     Checking rand_xorshift v0.1.0
[INFO] [stderr]     Checking Rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/collections/company.rs:14:33
[INFO] [stdout]    |
[INFO] [stdout] 14 |             .expect("Failure"); ;
[INFO] [stdout]    |                                 ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/collections/company.rs:14:33
[INFO] [stdout]    |
[INFO] [stdout] 14 |             .expect("Failure"); ;
[INFO] [stdout]    |                                 ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0502]: cannot borrow `entered` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/collections/company.rs:13:31
[INFO] [stdout]    |
[INFO] [stdout] 13 |         io::stdin().read_line(&mut entered)
[INFO] [stdout]    |                               ^^^^^^^^^^^^ mutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 16 |         let vec: Vec<&str> = entered.split(" ").collect();
[INFO] [stdout]    |                              ------- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 25 |             if map.contains_key(last) {
[INFO] [stdout]    |                --- immutable borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0502`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `Rust`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0502]: cannot borrow `entered` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/collections/company.rs:13:31
[INFO] [stdout]    |
[INFO] [stdout] 13 |         io::stdin().read_line(&mut entered)
[INFO] [stdout]    |                               ^^^^^^^^^^^^ mutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 16 |         let vec: Vec<&str> = entered.split(" ").collect();
[INFO] [stdout]    |                              ------- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 25 |             if map.contains_key(last) {
[INFO] [stdout]    |                --- immutable borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0502`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "6909a49481e8a6af81a29fd3cbbc2f9500962795d861a6596b2c4d9043dbea28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6909a49481e8a6af81a29fd3cbbc2f9500962795d861a6596b2c4d9043dbea28", kill_on_drop: false }`
[INFO] [stdout] 6909a49481e8a6af81a29fd3cbbc2f9500962795d861a6596b2c4d9043dbea28