[INFO] cloning repository https://github.com/steshaw/rustlings [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/steshaw/rustlings" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteshaw%2Frustlings", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteshaw%2Frustlings'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 06b46229ca0dd5b5fb874746d6ace8665151b11f [INFO] checking steshaw/rustlings against try#f6e2f78768c57172b99c3e85892f867894dc7e30 for pr-75502 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteshaw%2Frustlings" "/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/steshaw/rustlings on toolchain f6e2f78768c57172b99c3e85892f867894dc7e30 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "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-4/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" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded console v0.7.5 [INFO] [stderr] Downloaded clicolors-control v0.2.0 [INFO] [stderr] Downloaded console v0.6.2 [INFO] [stderr] Downloaded indicatif v0.9.0 [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:e18d859f9e32a1da89bc7b2d7d51e13b57342044d1295d9fc0dd0068c58eb3d1" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] f626b77b6d2fbbdc9a0962cf7149327c837854c0f5ab4a8eab85e34a79eac093 [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" "f626b77b6d2fbbdc9a0962cf7149327c837854c0f5ab4a8eab85e34a79eac093", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "f626b77b6d2fbbdc9a0962cf7149327c837854c0f5ab4a8eab85e34a79eac093", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f626b77b6d2fbbdc9a0962cf7149327c837854c0f5ab4a8eab85e34a79eac093", kill_on_drop: false }` [INFO] [stdout] f626b77b6d2fbbdc9a0962cf7149327c837854c0f5ab4a8eab85e34a79eac093 [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:e18d859f9e32a1da89bc7b2d7d51e13b57342044d1295d9fc0dd0068c58eb3d1" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] ddc4b2924b9972855fdce18b2da26095055733580c232107dc732e66cd49dffc [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" "ddc4b2924b9972855fdce18b2da26095055733580c232107dc732e66cd49dffc", kill_on_drop: false }` [INFO] [stderr] Checking rand_core v0.4.0 [INFO] [stderr] Checking cfg-if v0.1.9 [INFO] [stderr] Checking lazy_static v1.3.0 [INFO] [stderr] Compiling syn v0.15.34 [INFO] [stderr] Compiling regex v1.1.6 [INFO] [stderr] Checking smallvec v0.6.9 [INFO] [stderr] Compiling ryu v0.2.8 [INFO] [stderr] Checking lazy_static v0.2.11 [INFO] [stderr] Checking difference v2.0.0 [INFO] [stderr] Checking glob v0.3.0 [INFO] [stderr] Checking regex-syntax v0.5.6 [INFO] [stderr] Checking lock_api v0.2.0 [INFO] [stderr] Compiling quote v0.6.12 [INFO] [stderr] Compiling parking_lot_core v0.5.0 [INFO] [stderr] Compiling parking_lot v0.8.0 [INFO] [stderr] Checking aho-corasick v0.6.10 [INFO] [stderr] Checking clap v2.33.0 [INFO] [stderr] Checking inotify v0.6.1 [INFO] [stderr] Checking log v0.4.6 [INFO] [stderr] Checking net2 v0.2.33 [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 thread_local v0.3.6 [INFO] [stderr] Checking clicolors-control v1.0.0 [INFO] [stderr] Checking rand_core v0.3.1 [INFO] [stderr] Checking rand_os v0.1.3 [INFO] [stderr] Checking rand_jitter v0.1.4 [INFO] [stderr] Checking rand_pcg v0.1.2 [INFO] [stderr] Checking rand_hc v0.1.0 [INFO] [stderr] Checking rand_isaac v0.1.1 [INFO] [stderr] Checking rand_chacha v0.1.1 [INFO] [stderr] Checking rand_xorshift v0.1.1 [INFO] [stderr] Checking mio v0.6.19 [INFO] [stderr] Checking rand v0.6.5 [INFO] [stderr] Checking mio-extras v2.0.5 [INFO] [stderr] Checking notify v4.0.12 [INFO] [stderr] Checking predicates v1.0.1 [INFO] [stderr] Checking console v0.7.5 [INFO] [stderr] Checking console v0.6.2 [INFO] [stderr] Checking regex v0.2.11 [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] 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] 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: function is never used: `fact_recursive` [INFO] [stdout] --> examples/iterators4.rs:5:4 [INFO] [stdout] | [INFO] [stdout] 5 | fn fact_recursive(n: u64) -> u64 { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `fact_fold` [INFO] [stdout] --> examples/iterators4.rs:13:4 [INFO] [stdout] | [INFO] [stdout] 13 | fn fact_fold(n: u64) -> u64 { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant is never constructed: `Negative` [INFO] [stdout] --> examples/result1.rs:11:5 [INFO] [stdout] | [INFO] [stdout] 11 | Negative, [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant is never constructed: `Zero` [INFO] [stdout] --> examples/result1.rs:12:5 [INFO] [stdout] | [INFO] [stdout] 12 | Zero, [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `new` [INFO] [stdout] --> examples/result1.rs:16:8 [INFO] [stdout] | [INFO] [stdout] 16 | fn new(value: i64) -> Result { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: build failed [INFO] running `Command { std: "docker" "inspect" "ddc4b2924b9972855fdce18b2da26095055733580c232107dc732e66cd49dffc", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "ddc4b2924b9972855fdce18b2da26095055733580c232107dc732e66cd49dffc", kill_on_drop: false }` [INFO] [stdout] ddc4b2924b9972855fdce18b2da26095055733580c232107dc732e66cd49dffc