[INFO] updating cached repository https://github.com/steshaw/rustlings
[INFO] running `"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"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 06b46229ca0dd5b5fb874746d6ace8665151b11f
[INFO] checking steshaw/rustlings against try#13f916f63bc6575d5ff1f989237dfabe88981368 for pr-69880
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteshaw%2Frustlings" "/workspace/builds/worker-1/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/steshaw/rustlings on toolchain 13f916f63bc6575d5ff1f989237dfabe88981368
[INFO] running `"/workspace/cargo-home/bin/cargo" "+13f916f63bc6575d5ff1f989237dfabe88981368" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-1/source/Cargo.toml
[INFO] crate git repo https://github.com/steshaw/rustlings already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+13f916f63bc6575d5ff1f989237dfabe88981368" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "/opt/rustwide/cargo-home/bin/cargo" "+13f916f63bc6575d5ff1f989237dfabe88981368" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6379b08a5f3c3b6315bfc57a96aaf3250d61e3e02bb310d5618b504766296f50
[INFO] running `"docker" "start" "-a" "6379b08a5f3c3b6315bfc57a96aaf3250d61e3e02bb310d5618b504766296f50"`
[INFO] [stderr]     Checking rustlings v2.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variant is never constructed: `Negative`
[INFO] [stderr]   --> examples/result1.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     Negative,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Zero`
[INFO] [stderr]   --> examples/result1.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     Zero,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> examples/result1.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     fn new(value: i64) -> Result<PositiveNonzeroInteger, CreationError> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0601]: `main` function not found in crate `test3`
[INFO] [stderr]   --> examples/test3.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | / pub fn times_two(num: i32) -> i32 {
[INFO] [stderr] 11 | |     num * 2
[INFO] [stderr] 12 | | }
[INFO] [stderr] 13 | |
[INFO] [stderr] ...  |
[INFO] [stderr] 26 | |     }
[INFO] [stderr] 27 | | }
[INFO] [stderr]    | |_^ consider adding a `main` function to `examples/test3.rs`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0601`.
[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] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> examples/test1.rs:12:29
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let price_per_item = if (quantity > 40) { 1 } else { 2 };
[INFO] [stderr]    |                             ^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0601]: `main` function not found in crate `test1`
[INFO] [stderr]   --> examples/test1.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | / fn calculate_apple_price(quantity: i32) -> i32 {
[INFO] [stderr] 12 | |     let price_per_item = if (quantity > 40) { 1 } else { 2 };
[INFO] [stderr] 13 | |     price_per_item * quantity
[INFO] [stderr] 14 | | }
[INFO] [stderr] ...  |
[INFO] [stderr] 27 | |     assert_eq!(65, price2);
[INFO] [stderr] 28 | | }
[INFO] [stderr]    | |_^ consider adding a `main` function to `examples/test1.rs`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0601`.
[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] [stderr] error: build failed
[INFO] running `"docker" "inspect" "6379b08a5f3c3b6315bfc57a96aaf3250d61e3e02bb310d5618b504766296f50"`
[INFO] running `"docker" "rm" "-f" "6379b08a5f3c3b6315bfc57a96aaf3250d61e3e02bb310d5618b504766296f50"`
[INFO] [stdout] 6379b08a5f3c3b6315bfc57a96aaf3250d61e3e02bb310d5618b504766296f50