[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] b4b75e6ab46a7b528a2b69e5508689f47e706f69
[INFO] fixing FloydHsiu/learn-rust-notebook against try#622891a4e29178280638a6b63a8908bde2c0c854+cargoflags=-Zfix-edition=start=2015 for pr-157817-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFloydHsiu%2Flearn-rust-notebook" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/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-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/FloydHsiu/learn-rust-notebook on toolchain 622891a4e29178280638a6b63a8908bde2c0c854
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "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" "+622891a4e29178280638a6b63a8908bde2c0c854" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3a6becf2bc8dde7f3fa57ede90e4f284e72d296796fc446bbb1e2c7cc0530151" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 137b697c669f4becfcae35af6ffe3d3c0b91345b7c3325649976ba0ae94bf46d
[INFO] running `Command { std: "docker" "start" "137b697c669f4becfcae35af6ffe3d3c0b91345b7c3325649976ba0ae94bf46d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "137b697c669f4becfcae35af6ffe3d3c0b91345b7c3325649976ba0ae94bf46d" "/opt/rustwide/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "137b697c669f4becfcae35af6ffe3d3c0b91345b7c3325649976ba0ae94bf46d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=" "-e" "RUSTDOCFLAGS=" "-w" "/opt/rustwide/workdir" "--user" "0:0" "137b697c669f4becfcae35af6ffe3d3c0b91345b7c3325649976ba0ae94bf46d" "/opt/rustwide/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "fix" "--allow-no-vcs" "--allow-dirty" "--frozen" "--all" "--all-targets" "--message-format=json" "-Zfix-edition=start=2015", kill_on_drop: false }`
[INFO] [stderr]     Checking learn-rust-notebook v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0583]: file not found for module `draft`
[INFO] [stdout]  --> src/q0014_reverse_pairs/mod.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub mod draft;
[INFO] [stdout]   | ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: to create the module `draft`, create file "src/q0014_reverse_pairs/draft.rs" or "src/q0014_reverse_pairs/draft/mod.rs"
[INFO] [stdout]   = note: if there is a `mod draft` elsewhere in the crate already, import it with `use crate::...` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0583]: file not found for module `draft`
[INFO] [stdout]  --> src/q0015_merge_sorted_array/mod.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub mod draft;
[INFO] [stdout]   | ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: to create the module `draft`, create file "src/q0015_merge_sorted_array/draft.rs" or "src/q0015_merge_sorted_array/draft/mod.rs"
[INFO] [stdout]   = note: if there is a `mod draft` elsewhere in the crate already, import it with `use crate::...` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/q0010_kth_largest_element_in_array/solution.rs:13:18
[INFO] [stdout]    |
[INFO] [stdout] 13 |         for i in (l + 1..r) {
[INFO] [stdout]    |                  ^        ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 13 -         for i in (l + 1..r) {
[INFO] [stdout] 13 +         for i in l + 1..r  {
[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:19:25
[INFO] [stdout]    |
[INFO] [stdout] 19 |     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] error[E0583]: file not found for module `draft`
[INFO] [stdout]  --> src/q0014_reverse_pairs/mod.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub mod draft;
[INFO] [stdout]   | ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: to create the module `draft`, create file "src/q0014_reverse_pairs/draft.rs" or "src/q0014_reverse_pairs/draft/mod.rs"
[INFO] [stdout]   = note: if there is a `mod draft` elsewhere in the crate already, import it with `use crate::...` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0583]: file not found for module `draft`
[INFO] [stdout]  --> src/q0015_merge_sorted_array/mod.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub mod draft;
[INFO] [stdout]   | ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: to create the module `draft`, create file "src/q0015_merge_sorted_array/draft.rs" or "src/q0015_merge_sorted_array/draft/mod.rs"
[INFO] [stdout]   = note: if there is a `mod draft` elsewhere in the crate already, import it with `use crate::...` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `*cursor` as mutable more than once at a time
[INFO] [stdout]   --> src/q0012_insertion_sort_list/solution.rs:49:33
[INFO] [stdout]    |
[INFO] [stdout] 45 |                 Some(curr) if curr.val <= node.val => {
[INFO] [stdout]    |                      ---- first mutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 49 |                     node.next = cursor.take();
[INFO] [stdout]    |                                 ^^^^^^
[INFO] [stdout]    |                                 |
[INFO] [stdout]    |                                 second mutable borrow occurs here
[INFO] [stdout]    |                                 first borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0506]: cannot assign to `*cursor` because it is borrowed
[INFO] [stdout]   --> src/q0012_insertion_sort_list/solution.rs:50:21
[INFO] [stdout]    |
[INFO] [stdout] 45 |                 Some(curr) if curr.val <= node.val => {
[INFO] [stdout]    |                      ---- `*cursor` is borrowed here
[INFO] [stdout] ...
[INFO] [stdout] 50 |                     *cursor = Some(node);
[INFO] [stdout]    |                     ^^^^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     `*cursor` is assigned to here but it was already borrowed
[INFO] [stdout]    |                     borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0499, E0506, E0583.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0499`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `learn-rust-notebook` (lib) due to 4 previous errors; 3 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/q0010_kth_largest_element_in_array/solution.rs:13:18
[INFO] [stdout]    |
[INFO] [stdout] 13 |         for i in (l + 1..r) {
[INFO] [stdout]    |                  ^        ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 13 -         for i in (l + 1..r) {
[INFO] [stdout] 13 +         for i in l + 1..r  {
[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:19:25
[INFO] [stdout]    |
[INFO] [stdout] 19 |     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] error[E0499]: cannot borrow `*cursor` as mutable more than once at a time
[INFO] [stdout]   --> src/q0012_insertion_sort_list/solution.rs:49:33
[INFO] [stdout]    |
[INFO] [stdout] 45 |                 Some(curr) if curr.val <= node.val => {
[INFO] [stdout]    |                      ---- first mutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 49 |                     node.next = cursor.take();
[INFO] [stdout]    |                                 ^^^^^^
[INFO] [stdout]    |                                 |
[INFO] [stdout]    |                                 second mutable borrow occurs here
[INFO] [stdout]    |                                 first borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0506]: cannot assign to `*cursor` because it is borrowed
[INFO] [stdout]   --> src/q0012_insertion_sort_list/solution.rs:50:21
[INFO] [stdout]    |
[INFO] [stdout] 45 |                 Some(curr) if curr.val <= node.val => {
[INFO] [stdout]    |                      ---- `*cursor` is borrowed here
[INFO] [stdout] ...
[INFO] [stdout] 50 |                     *cursor = Some(node);
[INFO] [stdout]    |                     ^^^^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     `*cursor` is assigned to here but it was already borrowed
[INFO] [stdout]    |                     borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0499, E0506, E0583.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0499`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `learn-rust-notebook` (lib test) due to 4 previous errors; 4 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "137b697c669f4becfcae35af6ffe3d3c0b91345b7c3325649976ba0ae94bf46d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "137b697c669f4becfcae35af6ffe3d3c0b91345b7c3325649976ba0ae94bf46d", kill_on_drop: false }`
[INFO] [stdout] 137b697c669f4becfcae35af6ffe3d3c0b91345b7c3325649976ba0ae94bf46d
