[INFO] cloning repository https://github.com/ciuncan/hackerrank-solutions
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ciuncan/hackerrank-solutions" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fciuncan%2Fhackerrank-solutions", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fciuncan%2Fhackerrank-solutions'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dea775eb9113286f0ccbc4361c27acc5af9a483e
[INFO] checking ciuncan/hackerrank-solutions against master#3aedcf06b73fc36feeebca3d579e1d2a6c40acc5 for pr-65819
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fciuncan%2Fhackerrank-solutions" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ciuncan/hackerrank-solutions on toolchain 3aedcf06b73fc36feeebca3d579e1d2a6c40acc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ciuncan/hackerrank-solutions
[INFO] finished tweaking git repo https://github.com/ciuncan/hackerrank-solutions
[INFO] tweaked toml for git repo https://github.com/ciuncan/hackerrank-solutions written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/ciuncan/hackerrank-solutions already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/jobserver:/tmp/crater-runner-fifo:rw,Z" "-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" "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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 25d9bfe2d3746ebeddbb575329663e9f7b3a6935ee883ca86a617dac663d26d2
[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" "25d9bfe2d3746ebeddbb575329663e9f7b3a6935ee883ca86a617dac663d26d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "25d9bfe2d3746ebeddbb575329663e9f7b3a6935ee883ca86a617dac663d26d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25d9bfe2d3746ebeddbb575329663e9f7b3a6935ee883ca86a617dac663d26d2", kill_on_drop: false }`
[INFO] [stdout] 25d9bfe2d3746ebeddbb575329663e9f7b3a6935ee883ca86a617dac663d26d2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/jobserver:/tmp/crater-runner-fifo:rw,Z" "-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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTUP_TOOLCHAIN=3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "-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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/tmp/crater-runner-fifo/jobserver-crater-fwd" "/opt/rustwide/cargo-home/bin/cargo" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 60781af2f68b1e18e0e0e68485f15ffa3b278121abdf955d76fbe2e8dcf4ff5f
[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" "60781af2f68b1e18e0e0e68485f15ffa3b278121abdf955d76fbe2e8dcf4ff5f", kill_on_drop: false }`
[INFO] [stderr]     Checking hackerrank-solutions v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/lib.rs:16:36
[INFO] [stdout]    |
[INFO] [stdout] 16 |         .unwrap_or_else(|_| panic!(message.unwrap_or("Line expected!")));
[INFO] [stdout]    |                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 16 |         .unwrap_or_else(|_| panic!("{}", message.unwrap_or("Line expected!")));
[INFO] [stdout]    |                                    ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 16 |         .unwrap_or_else(|_| std::panic::panic_any(message.unwrap_or("Line expected!")));
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/lib.rs:16:36
[INFO] [stdout]    |
[INFO] [stdout] 16 |         .unwrap_or_else(|_| panic!(message.unwrap_or("Line expected!")));
[INFO] [stdout]    |                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 16 |         .unwrap_or_else(|_| panic!("{}", message.unwrap_or("Line expected!")));
[INFO] [stdout]    |                                    ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 16 |         .unwrap_or_else(|_| std::panic::panic_any(message.unwrap_or("Line expected!")));
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/arrays/two_d_array/mod.rs:23:20
[INFO] [stdout]    |
[INFO] [stdout] 23 |               panic!(format!(
[INFO] [stdout]    |  ____________________^
[INFO] [stdout] 24 | |                 "Hourglass at {:}, {:} is undefined for matrix {:}x{:}!",
[INFO] [stdout] 25 | |                 i, j, w, h
[INFO] [stdout] 26 | |             ));
[INFO] [stdout]    | |_____________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout]    = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 23 |             panic!(
[INFO] [stdout] 24 |                 "Hourglass at {:}, {:} is undefined for matrix {:}x{:}!",
[INFO] [stdout] 25 |                 i, j, w, h
[INFO] [stdout] 26 |             );
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/lib.rs:16:36
[INFO] [stdout]    |
[INFO] [stdout] 16 |         .unwrap_or_else(|_| panic!(message.unwrap_or("Line expected!")));
[INFO] [stdout]    |                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 16 |         .unwrap_or_else(|_| panic!("{}", message.unwrap_or("Line expected!")));
[INFO] [stdout]    |                                    ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 16 |         .unwrap_or_else(|_| std::panic::panic_any(message.unwrap_or("Line expected!")));
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/arrays/two_d_array/mod.rs:23:20
[INFO] [stdout]    |
[INFO] [stdout] 23 |               panic!(format!(
[INFO] [stdout]    |  ____________________^
[INFO] [stdout] 24 | |                 "Hourglass at {:}, {:} is undefined for matrix {:}x{:}!",
[INFO] [stdout] 25 | |                 i, j, w, h
[INFO] [stdout] 26 | |             ));
[INFO] [stdout]    | |_____________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout]    = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 23 |             panic!(
[INFO] [stdout] 24 |                 "Hourglass at {:}, {:} is undefined for matrix {:}x{:}!",
[INFO] [stdout] 25 |                 i, j, w, h
[INFO] [stdout] 26 |             );
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/lib.rs:16:36
[INFO] [stdout]    |
[INFO] [stdout] 16 |         .unwrap_or_else(|_| panic!(message.unwrap_or("Line expected!")));
[INFO] [stdout]    |                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 16 |         .unwrap_or_else(|_| panic!("{}", message.unwrap_or("Line expected!")));
[INFO] [stdout]    |                                    ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 16 |         .unwrap_or_else(|_| std::panic::panic_any(message.unwrap_or("Line expected!")));
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.26s
[INFO] running `Command { std: "docker" "inspect" "60781af2f68b1e18e0e0e68485f15ffa3b278121abdf955d76fbe2e8dcf4ff5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60781af2f68b1e18e0e0e68485f15ffa3b278121abdf955d76fbe2e8dcf4ff5f", kill_on_drop: false }`
[INFO] [stdout] 60781af2f68b1e18e0e0e68485f15ffa3b278121abdf955d76fbe2e8dcf4ff5f