[INFO] updating cached repository https://github.com/steshaw/rustlings
[INFO] running `Command { std: "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", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 06b46229ca0dd5b5fb874746d6ace8665151b11f
[INFO] checking steshaw/rustlings against master#1557fb031b272b4c5bfcc7de5df7eddc7b36a584 for pr-73166
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteshaw%2Frustlings" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/steshaw/rustlings on toolchain 1557fb031b272b4c5bfcc7de5df7eddc7b36a584
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1557fb031b272b4c5bfcc7de5df7eddc7b36a584" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/steshaw/rustlings
[INFO] finished tweaking git repo https://github.com/steshaw/rustlings
[INFO] tweaked toml for git repo https://github.com/steshaw/rustlings written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/steshaw/rustlings already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1557fb031b272b4c5bfcc7de5df7eddc7b36a584" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1557fb031b272b4c5bfcc7de5df7eddc7b36a584" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7923fe45d9b1f05d2d0e9f46dbb9eec2f174555fe818f481cb60f33d28d6485f
[INFO] running `Command { std: "docker" "start" "-a" "7923fe45d9b1f05d2d0e9f46dbb9eec2f174555fe818f481cb60f33d28d6485f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7923fe45d9b1f05d2d0e9f46dbb9eec2f174555fe818f481cb60f33d28d6485f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7923fe45d9b1f05d2d0e9f46dbb9eec2f174555fe818f481cb60f33d28d6485f", kill_on_drop: false }`
[INFO] [stdout] 7923fe45d9b1f05d2d0e9f46dbb9eec2f174555fe818f481cb60f33d28d6485f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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=forbid" "-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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1557fb031b272b4c5bfcc7de5df7eddc7b36a584" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 13bbe0db9ca52f65457c4855554a3b0d5806d588a7386119c426c8ac88914acb
[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" "13bbe0db9ca52f65457c4855554a3b0d5806d588a7386119c426c8ac88914acb", kill_on_drop: false }`
[INFO] [stderr]     Checking ucd-util v0.1.3
[INFO] [stderr]     Checking utf8-ranges v1.0.2
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]     Checking bitflags v1.0.4
[INFO] [stderr]     Checking same-file v1.0.4
[INFO] [stderr]     Checking lazycell v1.2.1
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking normalize-line-endings v0.2.2
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]     Checking aho-corasick v0.6.10
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]     Checking termios v0.3.1
[INFO] [stderr]     Checking clicolors-control v1.0.0
[INFO] [stderr]     Checking inotify-sys v0.1.3
[INFO] [stderr]     Checking filetime v0.2.5
[INFO] [stderr]     Checking clicolors-control v0.2.0
[INFO] [stderr]     Checking float-cmp v0.4.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking walkdir v2.2.7
[INFO] [stderr]     Checking regex-syntax v0.6.6
[INFO] [stderr]     Checking regex-syntax v0.5.6
[INFO] [stderr]     Checking inotify v0.6.1
[INFO] [stderr]     Checking mio v0.6.19
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]    Compiling syn v0.15.34
[INFO] [stderr]     Checking mio-extras v2.0.5
[INFO] [stderr]     Checking notify v4.0.12
[INFO] [stderr]     Checking regex v0.2.11
[INFO] [stderr]     Checking regex v1.1.6
[INFO] [stderr]     Checking console v0.7.5
[INFO] [stderr]     Checking console v0.6.2
[INFO] [stderr]     Checking predicates v1.0.1
[INFO] [stderr]     Checking indicatif v0.9.0
[INFO] [stderr]    Compiling serde_derive v1.0.92
[INFO] [stderr]     Checking serde v1.0.92
[INFO] [stderr]     Checking serde_json v1.0.39
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]     Checking rustlings v2.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking escargot v0.4.0
[INFO] [stderr]     Checking assert_cmd v0.11.1
[INFO] [stdout] error[E0601]: `main` function not found in crate `test3`
[INFO] [stdout]   --> examples/test3.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | / pub fn times_two(num: i32) -> i32 {
[INFO] [stdout] 11 | |     num * 2
[INFO] [stdout] 12 | | }
[INFO] [stdout] 13 | |
[INFO] [stdout] ...  |
[INFO] [stdout] 26 | |     }
[INFO] [stdout] 27 | | }
[INFO] [stdout]    | |_^ consider adding a `main` function to `examples/test3.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rustlings`.
[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] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> examples/test1.rs:12:29
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let price_per_item = if (quantity > 40) { 1 } else { 2 };
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `test1`
[INFO] [stdout]   --> examples/test1.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | / fn calculate_apple_price(quantity: i32) -> i32 {
[INFO] [stdout] 12 | |     let price_per_item = if (quantity > 40) { 1 } else { 2 };
[INFO] [stdout] 13 | |     price_per_item * quantity
[INFO] [stdout] 14 | | }
[INFO] [stdout] ...  |
[INFO] [stdout] 27 | |     assert_eq!(65, price2);
[INFO] [stdout] 28 | | }
[INFO] [stdout]    | |_^ consider adding a `main` function to `examples/test1.rs`
[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 E0601`.
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stdout]    --> examples/errorsn.rs:113:49
[INFO] [stdout]     |
[INFO] [stdout] 113 |         f.write_str((self as &dyn error::Error).description())
[INFO] [stdout]     |                                                 ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "13bbe0db9ca52f65457c4855554a3b0d5806d588a7386119c426c8ac88914acb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "13bbe0db9ca52f65457c4855554a3b0d5806d588a7386119c426c8ac88914acb", kill_on_drop: false }`
[INFO] [stdout] 13bbe0db9ca52f65457c4855554a3b0d5806d588a7386119c426c8ac88914acb