[INFO] cloning repository https://github.com/t-eckert/ctci_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/t-eckert/ctci_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ft-eckert%2Fctci_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ft-eckert%2Fctci_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4b2fcf04ee3818df8063d4c1dc24b039202e5245
[INFO] checking t-eckert/ctci_rust against master#af3c6e733a40e671550e0f0f5aeecaa13772ba56 for pr-74989
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ft-eckert%2Fctci_rust" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/t-eckert/ctci_rust on toolchain af3c6e733a40e671550e0f0f5aeecaa13772ba56
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+af3c6e733a40e671550e0f0f5aeecaa13772ba56" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/t-eckert/ctci_rust
[INFO] finished tweaking git repo https://github.com/t-eckert/ctci_rust
[INFO] tweaked toml for git repo https://github.com/t-eckert/ctci_rust written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/t-eckert/ctci_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+af3c6e733a40e671550e0f0f5aeecaa13772ba56" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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" "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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+af3c6e733a40e671550e0f0f5aeecaa13772ba56" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e2424bf677a2a218c2d7d90b3fb5321ea3b6fc1a93d22e92a4bdad1ff4a833f7
[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" "e2424bf677a2a218c2d7d90b3fb5321ea3b6fc1a93d22e92a4bdad1ff4a833f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e2424bf677a2a218c2d7d90b3fb5321ea3b6fc1a93d22e92a4bdad1ff4a833f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e2424bf677a2a218c2d7d90b3fb5321ea3b6fc1a93d22e92a4bdad1ff4a833f7", kill_on_drop: false }`
[INFO] [stdout] e2424bf677a2a218c2d7d90b3fb5321ea3b6fc1a93d22e92a4bdad1ff4a833f7
[INFO] running `Command { std: "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" "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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+af3c6e733a40e671550e0f0f5aeecaa13772ba56" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c815e74c4c4f5b1beb3e1873ffacf3a85160481fbf67c464ca12feb10e8614ff
[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" "c815e74c4c4f5b1beb3e1873ffacf3a85160481fbf67c464ca12feb10e8614ff", kill_on_drop: false }`
[INFO] [stderr]     Checking ctci_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]  --> ch01_arrays_and_strings/q01_is_unique.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     /// Returns true if a string contains no duplicate characters.
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 9 |     let input_set: HashSet<char> = HashSet::from_iter(input.chars());
[INFO] [stdout]   |     ----------------------------------------------------------------- rustdoc does not generate documentation for statements
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `is_unique`
[INFO] [stdout]   --> ch01_arrays_and_strings/q01_is_unique.rs:1:1
[INFO] [stdout]    |
[INFO] [stdout] 1  | / /// 1.1 Is Unique: 
[INFO] [stdout] 2  | | /// Implement an algorithm to determine if a string has all unique
[INFO] [stdout] 3  | | /// characters. What if you cannot use additional data structures?
[INFO] [stdout] 4  | | use std::collections::HashSet;
[INFO] [stdout] ...  |
[INFO] [stdout] 39 | |     }
[INFO] [stdout] 40 | | }
[INFO] [stdout]    | |_^ consider adding a `main` function to `ch01_arrays_and_strings/q01_is_unique.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] [stderr] error: could not compile `ctci_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] warning: unused doc comment
[INFO] [stdout]  --> ch01_arrays_and_strings/q01_is_unique.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     /// Returns true if a string contains no duplicate characters.
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 9 |     let input_set: HashSet<char> = HashSet::from_iter(input.chars());
[INFO] [stdout]   |     ----------------------------------------------------------------- rustdoc does not generate documentation for statements
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `ctci_rust`
[INFO] [stdout]   |
[INFO] [stdout]   = note: consider adding a `main` function to `src/main.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: build failed
[INFO] running `Command { std: "docker" "inspect" "c815e74c4c4f5b1beb3e1873ffacf3a85160481fbf67c464ca12feb10e8614ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c815e74c4c4f5b1beb3e1873ffacf3a85160481fbf67c464ca12feb10e8614ff", kill_on_drop: false }`
[INFO] [stdout] c815e74c4c4f5b1beb3e1873ffacf3a85160481fbf67c464ca12feb10e8614ff
