[INFO] cloning repository https://github.com/FloydHsiu/learn-rust-notebook
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/FloydHsiu/learn-rust-notebook" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFloydHsiu%2Flearn-rust-notebook", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFloydHsiu%2Flearn-rust-notebook'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 83d93b0c367d2d06020180a6db3ce334b6e2e2c9
[INFO] testing FloydHsiu/learn-rust-notebook against beta-2026-03-05 for beta-1.95-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFloydHsiu%2Flearn-rust-notebook" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/FloydHsiu/learn-rust-notebook
[INFO] finished tweaking git repo https://github.com/FloydHsiu/learn-rust-notebook
[INFO] tweaked toml for git repo https://github.com/FloydHsiu/learn-rust-notebook written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/FloydHsiu/learn-rust-notebook on toolchain beta-2026-03-05
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-03-05" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/FloydHsiu/learn-rust-notebook already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-03-05" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ee9bf24be18865e20f7838b50e141fe82a7aa58aea4e1f53e95fff7d44cfd80d
[INFO] running `Command { std: "docker" "start" "-a" "ee9bf24be18865e20f7838b50e141fe82a7aa58aea4e1f53e95fff7d44cfd80d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ee9bf24be18865e20f7838b50e141fe82a7aa58aea4e1f53e95fff7d44cfd80d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee9bf24be18865e20f7838b50e141fe82a7aa58aea4e1f53e95fff7d44cfd80d", kill_on_drop: false }`
[INFO] [stdout] ee9bf24be18865e20f7838b50e141fe82a7aa58aea4e1f53e95fff7d44cfd80d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] df237dbdc5de05ff65526f5f01f03644d5d1cfd8e34b79102e6bf596d98722ca
[INFO] running `Command { std: "docker" "start" "-a" "df237dbdc5de05ff65526f5f01f03644d5d1cfd8e34b79102e6bf596d98722ca", kill_on_drop: false }`
[INFO] [stderr]    Compiling learn-rust-notebook v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::q0000_sample::solution`
[INFO] [stdout]  --> src/q0008_reverse_linked_list/solution.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::q0000_sample::solution;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start`
[INFO] [stdout]   --> src/q0006_finding_number_of_visible_mounains/solution.rs:86:18
[INFO] [stdout]    |
[INFO] [stdout] 86 |             let (start, end) = intervals[i];
[INFO] [stdout]    |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/q0008_reverse_linked_list/solution.rs:24:25
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn reverse_list(mut head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stdout]    |                         ----^^^^
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Draft` is never constructed
[INFO] [stdout]  --> src/q0000_sample/solution.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Draft;
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]  --> src/q0000_sample/solution.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Draft` is never constructed
[INFO] [stdout]  --> src/q0006_finding_number_of_visible_mounains/solution.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Draft;
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]  --> src/q0006_finding_number_of_visible_mounains/solution.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `is_covered` and `visible_mountains` are never used
[INFO] [stdout]   --> src/q0006_finding_number_of_visible_mounains/solution.rs:5:12
[INFO] [stdout]    |
[INFO] [stdout]  4 | impl Draft {
[INFO] [stdout]    | ---------- associated functions in this implementation
[INFO] [stdout]  5 |     pub fn is_covered(peak_a: &(i32, i32), peak_b: &(i32, i32)) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 33 |     pub fn visible_mountains(peaks: Vec<Vec<i32>>) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `visible_mountains` is never used
[INFO] [stdout]   --> src/q0006_finding_number_of_visible_mounains/solution.rs:61:12
[INFO] [stdout]    |
[INFO] [stdout] 60 | impl Solution {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 61 |     pub fn visible_mountains(peaks: Vec<Vec<i32>>) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Draft` is never constructed
[INFO] [stdout]  --> src/q0007_odd_even_linked_list/solution.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Draft;
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]  --> src/q0007_odd_even_linked_list/solution.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/q0007_odd_even_linked_list/solution.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl ListNode {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 12 |     #[inline]
[INFO] [stdout] 13 |     fn new(val: i32) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `odd_even_list` is never used
[INFO] [stdout]   --> src/q0007_odd_even_linked_list/solution.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl Draft {
[INFO] [stdout]    | ---------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 25 |     pub fn odd_even_list(head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `odd_even_list` is never used
[INFO] [stdout]   --> src/q0007_odd_even_linked_list/solution.rs:57:12
[INFO] [stdout]    |
[INFO] [stdout] 53 | impl Solution {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 57 |     pub fn odd_even_list(mut head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Draft` is never constructed
[INFO] [stdout]  --> src/q0008_reverse_linked_list/solution.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Draft;
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]  --> src/q0008_reverse_linked_list/solution.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/q0008_reverse_linked_list/solution.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl ListNode {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 14 |     #[inline]
[INFO] [stdout] 15 |     fn new(val: i32) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `reverse_list` is never used
[INFO] [stdout]   --> src/q0008_reverse_linked_list/solution.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 23 | impl Draft {
[INFO] [stdout]    | ---------- associated function in this implementation
[INFO] [stdout] 24 |     pub fn reverse_list(mut head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `reverse_list` is never used
[INFO] [stdout]   --> src/q0008_reverse_linked_list/solution.rs:43:12
[INFO] [stdout]    |
[INFO] [stdout] 42 | impl Solution {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 43 |     pub fn reverse_list(head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.50s
[INFO] running `Command { std: "docker" "inspect" "df237dbdc5de05ff65526f5f01f03644d5d1cfd8e34b79102e6bf596d98722ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df237dbdc5de05ff65526f5f01f03644d5d1cfd8e34b79102e6bf596d98722ca", kill_on_drop: false }`
[INFO] [stdout] df237dbdc5de05ff65526f5f01f03644d5d1cfd8e34b79102e6bf596d98722ca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b080e292a865e19fbb6f1c6eef1fbfcef9c751287ec0a633be2cf9d44d23eedd
[INFO] running `Command { std: "docker" "start" "-a" "b080e292a865e19fbb6f1c6eef1fbfcef9c751287ec0a633be2cf9d44d23eedd", kill_on_drop: false }`
[INFO] [stdout] warning: unused import: `crate::q0000_sample::solution`
[INFO] [stdout]  --> src/q0008_reverse_linked_list/solution.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::q0000_sample::solution;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start`
[INFO] [stdout]   --> src/q0006_finding_number_of_visible_mounains/solution.rs:86:18
[INFO] [stdout]    |
[INFO] [stdout] 86 |             let (start, end) = intervals[i];
[INFO] [stdout]    |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/q0008_reverse_linked_list/solution.rs:24:25
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn reverse_list(mut head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stdout]    |                         ----^^^^
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Draft` is never constructed
[INFO] [stdout]  --> src/q0000_sample/solution.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Draft;
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]  --> src/q0000_sample/solution.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Draft` is never constructed
[INFO] [stdout]  --> src/q0006_finding_number_of_visible_mounains/solution.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Draft;
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]  --> src/q0006_finding_number_of_visible_mounains/solution.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `is_covered` and `visible_mountains` are never used
[INFO] [stdout]   --> src/q0006_finding_number_of_visible_mounains/solution.rs:5:12
[INFO] [stdout]    |
[INFO] [stdout]  4 | impl Draft {
[INFO] [stdout]    | ---------- associated functions in this implementation
[INFO] [stdout]  5 |     pub fn is_covered(peak_a: &(i32, i32), peak_b: &(i32, i32)) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 33 |     pub fn visible_mountains(peaks: Vec<Vec<i32>>) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `visible_mountains` is never used
[INFO] [stdout]   --> src/q0006_finding_number_of_visible_mounains/solution.rs:61:12
[INFO] [stdout]    |
[INFO] [stdout] 60 | impl Solution {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 61 |     pub fn visible_mountains(peaks: Vec<Vec<i32>>) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Draft` is never constructed
[INFO] [stdout]  --> src/q0007_odd_even_linked_list/solution.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Draft;
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]  --> src/q0007_odd_even_linked_list/solution.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/q0007_odd_even_linked_list/solution.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl ListNode {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 12 |     #[inline]
[INFO] [stdout] 13 |     fn new(val: i32) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `odd_even_list` is never used
[INFO] [stdout]   --> src/q0007_odd_even_linked_list/solution.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl Draft {
[INFO] [stdout]    | ---------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 25 |     pub fn odd_even_list(head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `odd_even_list` is never used
[INFO] [stdout]   --> src/q0007_odd_even_linked_list/solution.rs:57:12
[INFO] [stdout]    |
[INFO] [stdout] 53 | impl Solution {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 57 |     pub fn odd_even_list(mut head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Draft` is never constructed
[INFO] [stdout]  --> src/q0008_reverse_linked_list/solution.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Draft;
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]  --> src/q0008_reverse_linked_list/solution.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/q0008_reverse_linked_list/solution.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl ListNode {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 14 |     #[inline]
[INFO] [stdout] 15 |     fn new(val: i32) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `reverse_list` is never used
[INFO] [stdout]   --> src/q0008_reverse_linked_list/solution.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 23 | impl Draft {
[INFO] [stdout]    | ---------- associated function in this implementation
[INFO] [stdout] 24 |     pub fn reverse_list(mut head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `reverse_list` is never used
[INFO] [stdout]   --> src/q0008_reverse_linked_list/solution.rs:43:12
[INFO] [stdout]    |
[INFO] [stdout] 42 | impl Solution {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 43 |     pub fn reverse_list(head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling learn-rust-notebook v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Draft` and `Solution`
[INFO] [stdout]   --> src/q0000_sample/solution.rs:14:17
[INFO] [stdout]    |
[INFO] [stdout] 14 |     use super::{Draft, Solution};
[INFO] [stdout]    |                 ^^^^^  ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::q0000_sample::solution`
[INFO] [stdout]  --> src/q0008_reverse_linked_list/solution.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::q0000_sample::solution;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start`
[INFO] [stdout]   --> src/q0006_finding_number_of_visible_mounains/solution.rs:86:18
[INFO] [stdout]    |
[INFO] [stdout] 86 |             let (start, end) = intervals[i];
[INFO] [stdout]    |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/q0008_reverse_linked_list/solution.rs:24:25
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn reverse_list(mut head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stdout]    |                         ----^^^^
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Draft` is never constructed
[INFO] [stdout]  --> src/q0000_sample/solution.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Draft;
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]  --> src/q0000_sample/solution.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.91s
[INFO] running `Command { std: "docker" "inspect" "b080e292a865e19fbb6f1c6eef1fbfcef9c751287ec0a633be2cf9d44d23eedd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b080e292a865e19fbb6f1c6eef1fbfcef9c751287ec0a633be2cf9d44d23eedd", kill_on_drop: false }`
[INFO] [stdout] b080e292a865e19fbb6f1c6eef1fbfcef9c751287ec0a633be2cf9d44d23eedd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] efad8b0e157e1b575de6da3cb0965db9f619bfdffffc11e2cc366c0322ac9e05
[INFO] running `Command { std: "docker" "start" "-a" "efad8b0e157e1b575de6da3cb0965db9f619bfdffffc11e2cc366c0322ac9e05", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `crate::q0000_sample::solution`
[INFO] [stderr]  --> src/q0008_reverse_linked_list/solution.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use crate::q0000_sample::solution;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `start`
[INFO] [stderr]   --> src/q0006_finding_number_of_visible_mounains/solution.rs:86:18
[INFO] [stderr]    |
[INFO] [stderr] 86 |             let (start, end) = intervals[i];
[INFO] [stderr]    |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/q0008_reverse_linked_list/solution.rs:24:25
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn reverse_list(mut head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stderr]    |                         ----^^^^
[INFO] [stderr]    |                         |
[INFO] [stderr]    |                         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Draft` is never constructed
[INFO] [stderr]  --> src/q0000_sample/solution.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Draft;
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Solution` is never constructed
[INFO] [stderr]  --> src/q0000_sample/solution.rs:2:8
[INFO] [stderr]   |
[INFO] [stderr] 2 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Draft` is never constructed
[INFO] [stderr]  --> src/q0006_finding_number_of_visible_mounains/solution.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Draft;
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Solution` is never constructed
[INFO] [stderr]  --> src/q0006_finding_number_of_visible_mounains/solution.rs:2:8
[INFO] [stderr]   |
[INFO] [stderr] 2 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated functions `is_covered` and `visible_mountains` are never used
[INFO] [stderr]   --> src/q0006_finding_number_of_visible_mounains/solution.rs:5:12
[INFO] [stderr]    |
[INFO] [stderr]  4 | impl Draft {
[INFO] [stderr]    | ---------- associated functions in this implementation
[INFO] [stderr]  5 |     pub fn is_covered(peak_a: &(i32, i32), peak_b: &(i32, i32)) -> bool {
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 33 |     pub fn visible_mountains(peaks: Vec<Vec<i32>>) -> i32 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `visible_mountains` is never used
[INFO] [stderr]   --> src/q0006_finding_number_of_visible_mounains/solution.rs:61:12
[INFO] [stderr]    |
[INFO] [stderr] 60 | impl Solution {
[INFO] [stderr]    | ------------- associated function in this implementation
[INFO] [stderr] 61 |     pub fn visible_mountains(peaks: Vec<Vec<i32>>) -> i32 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Draft` is never constructed
[INFO] [stderr]  --> src/q0007_odd_even_linked_list/solution.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Draft;
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Solution` is never constructed
[INFO] [stderr]  --> src/q0007_odd_even_linked_list/solution.rs:2:8
[INFO] [stderr]   |
[INFO] [stderr] 2 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> src/q0007_odd_even_linked_list/solution.rs:13:8
[INFO] [stderr]    |
[INFO] [stderr] 11 | impl ListNode {
[INFO] [stderr]    | ------------- associated function in this implementation
[INFO] [stderr] 12 |     #[inline]
[INFO] [stderr] 13 |     fn new(val: i32) -> Self {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `odd_even_list` is never used
[INFO] [stderr]   --> src/q0007_odd_even_linked_list/solution.rs:25:12
[INFO] [stderr]    |
[INFO] [stderr] 21 | impl Draft {
[INFO] [stderr]    | ---------- associated function in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 25 |     pub fn odd_even_list(head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stderr]    |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `odd_even_list` is never used
[INFO] [stderr]   --> src/q0007_odd_even_linked_list/solution.rs:57:12
[INFO] [stderr]    |
[INFO] [stderr] 53 | impl Solution {
[INFO] [stderr]    | ------------- associated function in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 57 |     pub fn odd_even_list(mut head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stderr]    |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Draft` is never constructed
[INFO] [stderr]  --> src/q0008_reverse_linked_list/solution.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | struct Draft;
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Solution` is never constructed
[INFO] [stderr]  --> src/q0008_reverse_linked_list/solution.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> src/q0008_reverse_linked_list/solution.rs:15:8
[INFO] [stderr]    |
[INFO] [stderr] 13 | impl ListNode {
[INFO] [stderr]    | ------------- associated function in this implementation
[INFO] [stderr] 14 |     #[inline]
[INFO] [stderr] 15 |     fn new(val: i32) -> Self {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `reverse_list` is never used
[INFO] [stderr]   --> src/q0008_reverse_linked_list/solution.rs:24:12
[INFO] [stderr]    |
[INFO] [stderr] 23 | impl Draft {
[INFO] [stderr]    | ---------- associated function in this implementation
[INFO] [stderr] 24 |     pub fn reverse_list(mut head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stderr]    |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `reverse_list` is never used
[INFO] [stderr]   --> src/q0008_reverse_linked_list/solution.rs:43:12
[INFO] [stderr]    |
[INFO] [stderr] 42 | impl Solution {
[INFO] [stderr]    | ------------- associated function in this implementation
[INFO] [stderr] 43 |     pub fn reverse_list(head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stderr]    |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `learn-rust-notebook` (lib) generated 19 warnings (run `cargo fix --lib -p learn-rust-notebook` to apply 3 suggestions)
[INFO] [stderr] warning: unused imports: `Draft` and `Solution`
[INFO] [stderr]   --> src/q0000_sample/solution.rs:14:17
[INFO] [stderr]    |
[INFO] [stderr] 14 |     use super::{Draft, Solution};
[INFO] [stderr]    |                 ^^^^^  ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::q0000_sample::solution`
[INFO] [stderr]  --> src/q0008_reverse_linked_list/solution.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use crate::q0000_sample::solution;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `learn-rust-notebook` (lib test) generated 6 warnings (4 duplicates) (run `cargo fix --lib -p learn-rust-notebook --tests` to apply 2 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/learn_rust_notebook-dbcef0a7ebe4e968)
[INFO] [stdout] 
[INFO] [stdout] running 21 tests
[INFO] [stdout] test q0000_sample::solution::tests::solution_works ... ok
[INFO] [stdout] test q0001_repeated_substr_pattern::draft::tests::it_works ... ok
[INFO] [stdout] test q0002_rotate_string::solution::tests::test_different_lengths ... ok
[INFO] [stdout] test q0002_rotate_string::draft::tests::it_works ... ok
[INFO] [stdout] test q0000_sample::solution::tests::draft_works ... ok
[INFO] [stdout] test q0002_rotate_string::solution::tests::test_empty_strings ... ok
[INFO] [stdout] test q0001_repeated_substr_pattern::solution::tests::test_repeated_substring_pattern ... ok
[INFO] [stdout] test q0002_rotate_string::solution::tests::test_rotate_string_success ... ok
[INFO] [stdout] test q0003_repeated_string_match::draft::tests::it_works ... ok
[INFO] [stdout] test q0004_number_of_valid_subarrays::draft::tests::it_works ... ok
[INFO] [stdout] test q0005_buildings_with_an_ocean_view::draft::tests::it_works ... ok
[INFO] [stdout] test q0007_odd_even_linked_list::solution::tests::draft_works ... ok
[INFO] [stdout] test q0006_finding_number_of_visible_mounains::solution::tests::draft_works ... ok
[INFO] [stdout] test q0006_finding_number_of_visible_mounains::solution::tests::solution_works ... ok
[INFO] [stdout] test q0002_rotate_string::solution::tests::test_rotate_string_failure ... ok
[INFO] [stdout] test q0004_number_of_valid_subarrays::solution::tests::it_works ... ok
[INFO] [stdout] test q0005_buildings_with_an_ocean_view::solution::tests::it_works ... ok
[INFO] [stdout] test q0008_reverse_linked_list::solution::tests::draft_works ... ok
[INFO] [stdout] test q0008_reverse_linked_list::solution::tests::solution_works ... ok
[INFO] [stdout] test q0007_odd_even_linked_list::solution::tests::solution_works ... ok
[INFO] [stdout] test q0003_repeated_string_match::solution::tests::it_works ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- q0003_repeated_string_match::solution::tests::it_works stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'q0003_repeated_string_match::solution::tests::it_works' (27) panicked at src/q0003_repeated_string_match/solution.rs:39:9:
[INFO] [stdout] assertion `left == right` failed
[INFO] [stdout]   left: 4
[INFO] [stdout]  right: 3
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x597ab75cfb1a - std[b80a194dd3c418bb]::backtrace_rs::backtrace::libunwind::trace
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x597ab75cfb1a - std[b80a194dd3c418bb]::backtrace_rs::backtrace::trace_unsynchronized::<std[b80a194dd3c418bb]::sys::backtrace::_print_fmt::{closure#1}>
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x597ab75cfb1a - std[b80a194dd3c418bb]::sys::backtrace::_print_fmt
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/sys/backtrace.rs:74:9
[INFO] [stdout]    3:     0x597ab75cfb1a - <<std[b80a194dd3c418bb]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[10b6fa85044e1869]::fmt::Display>::fmt
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/sys/backtrace.rs:44:26
[INFO] [stdout]    4:     0x597ab75e37ea - <core[10b6fa85044e1869]::fmt::rt::Argument>::fmt
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/core/src/fmt/rt.rs:152:76
[INFO] [stdout]    5:     0x597ab75e37ea - core[10b6fa85044e1869]::fmt::write
[INFO] [stdout]    6:     0x597ab75d43a2 - std[b80a194dd3c418bb]::io::default_write_fmt::<alloc[dd269455e567d8e9]::vec::Vec<u8>>
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x597ab75d43a2 - <alloc[dd269455e567d8e9]::vec::Vec<u8> as std[b80a194dd3c418bb]::io::Write>::write_fmt
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/io/mod.rs:1994:13
[INFO] [stdout]    8:     0x597ab75aed2f - <std[b80a194dd3c418bb]::sys::backtrace::BacktraceLock>::print
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/sys/backtrace.rs:47:9
[INFO] [stdout]    9:     0x597ab75aed2f - std[b80a194dd3c418bb]::panicking::default_hook::{closure#0}
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/panicking.rs:292:27
[INFO] [stdout]   10:     0x597ab75c8089 - std[b80a194dd3c418bb]::panicking::default_hook
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/panicking.rs:316:9
[INFO] [stdout]   11:     0x597ab75650ec - <alloc[dd269455e567d8e9]::boxed::Box<dyn for<'a, 'b> core[10b6fa85044e1869]::ops::function::Fn<(&'a std[b80a194dd3c418bb]::panic::PanicHookInfo<'b>,), Output = ()> + core[10b6fa85044e1869]::marker::Sync + core[10b6fa85044e1869]::marker::Send> as core[10b6fa85044e1869]::ops::function::Fn<(&std[b80a194dd3c418bb]::panic::PanicHookInfo,)>>::call
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/alloc/src/boxed.rs:2254:9
[INFO] [stdout]   12:     0x597ab75650ec - test[826cbc6ef54ab466]::test_main_with_exit_callback::<test[826cbc6ef54ab466]::test_main::{closure#0}>::{closure#0}
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x597ab75c8242 - <alloc[dd269455e567d8e9]::boxed::Box<dyn for<'a, 'b> core[10b6fa85044e1869]::ops::function::Fn<(&'a std[b80a194dd3c418bb]::panic::PanicHookInfo<'b>,), Output = ()> + core[10b6fa85044e1869]::marker::Sync + core[10b6fa85044e1869]::marker::Send> as core[10b6fa85044e1869]::ops::function::Fn<(&std[b80a194dd3c418bb]::panic::PanicHookInfo,)>>::call
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/alloc/src/boxed.rs:2254:9
[INFO] [stdout]   14:     0x597ab75c8242 - std[b80a194dd3c418bb]::panicking::panic_with_hook
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/panicking.rs:833:13
[INFO] [stdout]   15:     0x597ab75aede8 - std[b80a194dd3c418bb]::panicking::panic_handler::{closure#0}
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/panicking.rs:698:13
[INFO] [stdout]   16:     0x597ab75a6789 - std[b80a194dd3c418bb]::sys::backtrace::__rust_end_short_backtrace::<std[b80a194dd3c418bb]::panicking::panic_handler::{closure#0}, !>
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/sys/backtrace.rs:182:18
[INFO] [stdout]   17:     0x597ab75afafd - __rustc[9698a3e60dd14283]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/panicking.rs:689:5
[INFO] [stdout]   18:     0x597ab75e405c - core[10b6fa85044e1869]::panicking::panic_fmt
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/core/src/panicking.rs:80:14
[INFO] [stdout]   19:     0x597ab75e3f13 - core[10b6fa85044e1869]::panicking::assert_failed_inner
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/core/src/panicking.rs:439:17
[INFO] [stdout]   20:     0x597ab75a3275 - core[10b6fa85044e1869]::panicking::assert_failed::<i32, i32>
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/core/src/panicking.rs:394:5
[INFO] [stdout]   21:     0x597ab754dd41 - learn_rust_notebook::q0003_repeated_string_match::solution::tests::it_works::hdff8e8c77ffc1ff0
[INFO] [stdout]                                at /opt/rustwide/workdir/src/q0003_repeated_string_match/solution.rs:39:9
[INFO] [stdout]   22:     0x597ab754dd67 - learn_rust_notebook::q0003_repeated_string_match::solution::tests::it_works::{{closure}}::h1eeb6b8baec26345
[INFO] [stdout]                                at /opt/rustwide/workdir/src/q0003_repeated_string_match/solution.rs:34:18
[INFO] [stdout]   23:     0x597ab7557f06 - core::ops::function::FnOnce::call_once::h955f33eadfc5979e
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x597ab75591cb - <fn() -> core[10b6fa85044e1869]::result::Result<(), alloc[dd269455e567d8e9]::string::String> as core[10b6fa85044e1869]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x597ab75591cb - test[826cbc6ef54ab466]::__rust_begin_short_backtrace::<core[10b6fa85044e1869]::result::Result<(), alloc[dd269455e567d8e9]::string::String>, fn() -> core[10b6fa85044e1869]::result::Result<(), alloc[dd269455e567d8e9]::string::String>>
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/test/src/lib.rs:663:18
[INFO] [stdout]   26:     0x597ab7565bbb - test[826cbc6ef54ab466]::run_test_in_process::{closure#0}
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/test/src/lib.rs:686:74
[INFO] [stdout]   27:     0x597ab7565bbb - <core[10b6fa85044e1869]::panic::unwind_safe::AssertUnwindSafe<test[826cbc6ef54ab466]::run_test_in_process::{closure#0}> as core[10b6fa85044e1869]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   28:     0x597ab7565bbb - std[b80a194dd3c418bb]::panicking::catch_unwind::do_call::<core[10b6fa85044e1869]::panic::unwind_safe::AssertUnwindSafe<test[826cbc6ef54ab466]::run_test_in_process::{closure#0}>, core[10b6fa85044e1869]::result::Result<(), alloc[dd269455e567d8e9]::string::String>>
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/panicking.rs:581:40
[INFO] [stdout]   29:     0x597ab7565bbb - std[b80a194dd3c418bb]::panicking::catch_unwind::<core[10b6fa85044e1869]::result::Result<(), alloc[dd269455e567d8e9]::string::String>, core[10b6fa85044e1869]::panic::unwind_safe::AssertUnwindSafe<test[826cbc6ef54ab466]::run_test_in_process::{closure#0}>>
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/panicking.rs:544:19
[INFO] [stdout]   30:     0x597ab7565bbb - std[b80a194dd3c418bb]::panic::catch_unwind::<core[10b6fa85044e1869]::panic::unwind_safe::AssertUnwindSafe<test[826cbc6ef54ab466]::run_test_in_process::{closure#0}>, core[10b6fa85044e1869]::result::Result<(), alloc[dd269455e567d8e9]::string::String>>
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/panic.rs:359:14
[INFO] [stdout]   31:     0x597ab7565bbb - test[826cbc6ef54ab466]::run_test_in_process
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/test/src/lib.rs:686:27
[INFO] [stdout]   32:     0x597ab7565bbb - test[826cbc6ef54ab466]::run_test::{closure#0}
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/test/src/lib.rs:607:43
[INFO] [stdout]   33:     0x597ab75612d4 - test[826cbc6ef54ab466]::run_test::{closure#1}
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/test/src/lib.rs:637:41
[INFO] [stdout]   34:     0x597ab75612d4 - std[b80a194dd3c418bb]::sys::backtrace::__rust_begin_short_backtrace::<test[826cbc6ef54ab466]::run_test::{closure#1}, ()>
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/sys/backtrace.rs:166:18
[INFO] [stdout]   35:     0x597ab75687c2 - std[b80a194dd3c418bb]::thread::lifecycle::spawn_unchecked::<test[826cbc6ef54ab466]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/thread/lifecycle.rs:91:13
[INFO] [stdout]   36:     0x597ab75687c2 - <core[10b6fa85044e1869]::panic::unwind_safe::AssertUnwindSafe<std[b80a194dd3c418bb]::thread::lifecycle::spawn_unchecked<test[826cbc6ef54ab466]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}> as core[10b6fa85044e1869]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   37:     0x597ab75687c2 - std[b80a194dd3c418bb]::panicking::catch_unwind::do_call::<core[10b6fa85044e1869]::panic::unwind_safe::AssertUnwindSafe<std[b80a194dd3c418bb]::thread::lifecycle::spawn_unchecked<test[826cbc6ef54ab466]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>, ()>
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/panicking.rs:581:40
[INFO] [stdout]   38:     0x597ab75687c2 - std[b80a194dd3c418bb]::panicking::catch_unwind::<(), core[10b6fa85044e1869]::panic::unwind_safe::AssertUnwindSafe<std[b80a194dd3c418bb]::thread::lifecycle::spawn_unchecked<test[826cbc6ef54ab466]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>>
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/panicking.rs:544:19
[INFO] [stdout]   39:     0x597ab75687c2 - std[b80a194dd3c418bb]::panic::catch_unwind::<core[10b6fa85044e1869]::panic::unwind_safe::AssertUnwindSafe<std[b80a194dd3c418bb]::thread::lifecycle::spawn_unchecked<test[826cbc6ef54ab466]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>, ()>
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/panic.rs:359:14
[INFO] [stdout]   40:     0x597ab75687c2 - std[b80a194dd3c418bb]::thread::lifecycle::spawn_unchecked::<test[826cbc6ef54ab466]::run_test::{closure#1}, ()>::{closure#1}
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/thread/lifecycle.rs:89:26
[INFO] [stdout]   41:     0x597ab75687c2 - <std[b80a194dd3c418bb]::thread::lifecycle::spawn_unchecked<test[826cbc6ef54ab466]::run_test::{closure#1}, ()>::{closure#1} as core[10b6fa85044e1869]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x597ab75cf42f - <alloc[dd269455e567d8e9]::boxed::Box<dyn core[10b6fa85044e1869]::ops::function::FnOnce<(), Output = ()> + core[10b6fa85044e1869]::marker::Send> as core[10b6fa85044e1869]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/alloc/src/boxed.rs:2240:9
[INFO] [stdout]   43:     0x597ab75cf42f - <std[b80a194dd3c418bb]::sys::thread::unix::Thread>::new::thread_start
[INFO] [stdout]                                at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/sys/thread/unix.rs:118:17
[INFO] [stdout]   44:     0x7605fc12baa4 - <unknown>
[INFO] [stdout]   45:     0x7605fc1b8a64 - clone
[INFO] [stdout]   46:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     q0003_repeated_string_match::solution::tests::it_works
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 20 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.05s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--lib`
[INFO] running `Command { std: "docker" "inspect" "efad8b0e157e1b575de6da3cb0965db9f619bfdffffc11e2cc366c0322ac9e05", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "efad8b0e157e1b575de6da3cb0965db9f619bfdffffc11e2cc366c0322ac9e05", kill_on_drop: false }`
[INFO] [stdout] efad8b0e157e1b575de6da3cb0965db9f619bfdffffc11e2cc366c0322ac9e05
