[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 master#6250d56355d72264ece721e8d0dc95b16a6824b1 for pr-68350 [INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteshaw%2Frustlings" "/workspace/builds/worker-7/source"` [INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/steshaw/rustlings on toolchain 6250d56355d72264ece721e8d0dc95b16a6824b1 [INFO] running `"/workspace/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "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-7/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" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "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] 520d334aa72d92f46cda7f96652f6d8df2dfb739e09d07e889a59e7838f5d63a [INFO] running `"docker" "start" "-a" "520d334aa72d92f46cda7f96652f6d8df2dfb739e09d07e889a59e7838f5d63a"` [INFO] [stderr] Compiling parking_lot_core v0.5.0 [INFO] [stderr] Compiling parking_lot v0.8.0 [INFO] [stderr] Checking termios v0.3.1 [INFO] [stderr] Checking clicolors-control v1.0.0 [INFO] [stderr] Checking clicolors-control v0.2.0 [INFO] [stderr] Checking inotify v0.6.1 [INFO] [stderr] Checking regex v0.2.11 [INFO] [stderr] Compiling serde_derive v1.0.92 [INFO] [stderr] Checking mio-extras v2.0.5 [INFO] [stderr] Checking predicates v1.0.1 [INFO] [stderr] Checking notify v4.0.12 [INFO] [stderr] Checking console v0.7.5 [INFO] [stderr] Checking console v0.6.2 [INFO] [stderr] Checking indicatif v0.9.0 [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] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string() [INFO] [stderr] --> examples/errorsn.rs:113:49 [INFO] [stderr] | [INFO] [stderr] 113 | f.write_str((self as &dyn error::Error).description()) [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(deprecated)]` on by default [INFO] [stderr] [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 { [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] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] warning: function is never used: `fact_recursive` [INFO] [stderr] --> examples/iterators4.rs:5:4 [INFO] [stderr] | [INFO] [stderr] 5 | fn fact_recursive(n: u64) -> u64 { [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `fact_fold` [INFO] [stderr] --> examples/iterators4.rs:13:4 [INFO] [stderr] | [INFO] [stderr] 13 | fn fact_fold(n: u64) -> u64 { [INFO] [stderr] | ^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] error: build failed [INFO] running `"docker" "inspect" "520d334aa72d92f46cda7f96652f6d8df2dfb739e09d07e889a59e7838f5d63a"` [INFO] running `"docker" "rm" "-f" "520d334aa72d92f46cda7f96652f6d8df2dfb739e09d07e889a59e7838f5d63a"` [INFO] [stdout] 520d334aa72d92f46cda7f96652f6d8df2dfb739e09d07e889a59e7838f5d63a