[INFO] fetching crate quarkrs 0.1.1...
[INFO] checking quarkrs-0.1.1 against try#0611f7de057c584b8771102fde7aed6c70c71d3b for pr-146440
[INFO] extracting crate quarkrs 0.1.1 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate quarkrs 0.1.1
[INFO] finished tweaking crates.io crate quarkrs 0.1.1
[INFO] tweaked toml for crates.io crate quarkrs 0.1.1 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate quarkrs 0.1.1 on toolchain 0611f7de057c584b8771102fde7aed6c70c71d3b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 23940d252d83767870f113273ba2b5bf20fed93a57e03a21da29484346635ecf
[INFO] running `Command { std: "docker" "start" "-a" "23940d252d83767870f113273ba2b5bf20fed93a57e03a21da29484346635ecf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "23940d252d83767870f113273ba2b5bf20fed93a57e03a21da29484346635ecf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "23940d252d83767870f113273ba2b5bf20fed93a57e03a21da29484346635ecf", kill_on_drop: false }`
[INFO] [stdout] 23940d252d83767870f113273ba2b5bf20fed93a57e03a21da29484346635ecf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=forbid" "-e" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ad20b57fc1e4149f79b853ef6512449b0d2b3ef1d63949261a6774b18d4df969
[INFO] running `Command { std: "docker" "start" "-a" "ad20b57fc1e4149f79b853ef6512449b0d2b3ef1d63949261a6774b18d4df969", kill_on_drop: false }`
[INFO] [stderr]     Checking quarkrs v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]   --> src/structures/graph.rs:24:28
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn get_node(&self, val: T){todo!()}
[INFO] [stdout]    |                            ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/structures/graph.rs:47:30
[INFO] [stdout]    |
[INFO] [stdout] 47 |     pub fn insert(&mut self, value: T, parent: T) {todo!()}
[INFO] [stdout]    |                              ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]   --> src/structures/graph.rs:47:40
[INFO] [stdout]    |
[INFO] [stdout] 47 |     pub fn insert(&mut self, value: T, parent: T) {todo!()}
[INFO] [stdout]    |                                        ^^^^^^ help: if this is intentional, prefix it with an underscore: `_parent`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `link_a`
[INFO] [stdout]   --> src/structures/graph.rs:49:38
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn add_undirected_arc(&self, link_a: T, link_b: T) {todo!()}
[INFO] [stdout]    |                                      ^^^^^^ help: if this is intentional, prefix it with an underscore: `_link_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `link_b`
[INFO] [stdout]   --> src/structures/graph.rs:49:49
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn add_undirected_arc(&self, link_a: T, link_b: T) {todo!()}
[INFO] [stdout]    |                                                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_link_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `from`
[INFO] [stdout]   --> src/structures/graph.rs:51:36
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn add_directed_arc(&self, from: T, to: T) {todo!()}
[INFO] [stdout]    |                                    ^^^^ help: if this is intentional, prefix it with an underscore: `_from`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `to`
[INFO] [stdout]   --> src/structures/graph.rs:51:45
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn add_directed_arc(&self, from: T, to: T) {todo!()}
[INFO] [stdout]    |                                             ^^ help: if this is intentional, prefix it with an underscore: `_to`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/structures/graph.rs:53:28
[INFO] [stdout]    |
[INFO] [stdout] 53 |     pub fn contains(&self, value: T) -> bool {todo!()}
[INFO] [stdout]    |                            ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/structures/graph.rs:55:26
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn remove(&self, value: T) -> bool {todo!()}
[INFO] [stdout]    |                          ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `old`
[INFO] [stdout]   --> src/structures/graph.rs:57:26
[INFO] [stdout]    |
[INFO] [stdout] 57 |     pub fn update(&self, old: T, new: T) -> bool {todo!()}
[INFO] [stdout]    |                          ^^^ help: if this is intentional, prefix it with an underscore: `_old`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `new`
[INFO] [stdout]   --> src/structures/graph.rs:57:34
[INFO] [stdout]    |
[INFO] [stdout] 57 |     pub fn update(&self, old: T, new: T) -> bool {todo!()}
[INFO] [stdout]    |                                  ^^^ help: if this is intentional, prefix it with an underscore: `_new`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `UnweightedGraph` is never constructed
[INFO] [stdout]   --> src/structures/graph.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct UnweightedGraph<T> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]    = note: `#[deny(unused_unconstructable_pub_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `value` and `arcs` are never read
[INFO] [stdout]  --> src/structures/graph.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct GraphNode<T> {
[INFO] [stdout]   |        --------- fields in this struct
[INFO] [stdout] 4 |     value: T,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 5 |     arcs: Vec<ThreadData<GraphNode<T>>>
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `new_struct`, `add_arc`, and `get_node` are never used
[INFO] [stdout]   --> src/structures/graph.rs:9:12
[INFO] [stdout]    |
[INFO] [stdout]  8 | impl<T> GraphNode<T> {
[INFO] [stdout]    | -------------------- associated items in this implementation
[INFO] [stdout]  9 |     pub fn new(val: T) -> GraphNode<T> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     fn new_struct(val: T) -> ThreadData<GraphNode<T>> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 20 |     pub fn add_arc(&mut self, val: T) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 24 |     pub fn get_node(&self, val: T){todo!()}
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `entry` is never read
[INFO] [stdout]   --> src/structures/graph.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct UnweightedGraph<T> {
[INFO] [stdout]    |            --------------- field in this struct
[INFO] [stdout] 30 |     entry: ThreadData<GraphNode<T>>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `add_subtree` is never used
[INFO] [stdout]   --> src/structures/tree.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl<T> TreeNode<T> {
[INFO] [stdout]    | ------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 28 |     fn add_subtree(&mut self, tree: TreeNode<T>) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `to_string` is never used
[INFO] [stdout]   --> src/structures/linked_list.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout]  9 | / impl<T> ListNode<T> 
[INFO] [stdout] 10 | |     where T: Debug {
[INFO] [stdout]    | |__________________- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 35 |       fn to_string(&self) -> String {format!("{:?}", self.value)}
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]   --> src/structures/graph.rs:24:28
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn get_node(&self, val: T){todo!()}
[INFO] [stdout]    |                            ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/structures/graph.rs:47:30
[INFO] [stdout]    |
[INFO] [stdout] 47 |     pub fn insert(&mut self, value: T, parent: T) {todo!()}
[INFO] [stdout]    |                              ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]   --> src/structures/graph.rs:47:40
[INFO] [stdout]    |
[INFO] [stdout] 47 |     pub fn insert(&mut self, value: T, parent: T) {todo!()}
[INFO] [stdout]    |                                        ^^^^^^ help: if this is intentional, prefix it with an underscore: `_parent`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `link_a`
[INFO] [stdout]   --> src/structures/graph.rs:49:38
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn add_undirected_arc(&self, link_a: T, link_b: T) {todo!()}
[INFO] [stdout]    |                                      ^^^^^^ help: if this is intentional, prefix it with an underscore: `_link_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `link_b`
[INFO] [stdout]   --> src/structures/graph.rs:49:49
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn add_undirected_arc(&self, link_a: T, link_b: T) {todo!()}
[INFO] [stdout]    |                                                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_link_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `from`
[INFO] [stdout]   --> src/structures/graph.rs:51:36
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn add_directed_arc(&self, from: T, to: T) {todo!()}
[INFO] [stdout]    |                                    ^^^^ help: if this is intentional, prefix it with an underscore: `_from`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `to`
[INFO] [stdout]   --> src/structures/graph.rs:51:45
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn add_directed_arc(&self, from: T, to: T) {todo!()}
[INFO] [stdout]    |                                             ^^ help: if this is intentional, prefix it with an underscore: `_to`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/structures/graph.rs:53:28
[INFO] [stdout]    |
[INFO] [stdout] 53 |     pub fn contains(&self, value: T) -> bool {todo!()}
[INFO] [stdout]    |                            ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/structures/graph.rs:55:26
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn remove(&self, value: T) -> bool {todo!()}
[INFO] [stdout]    |                          ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `old`
[INFO] [stdout]   --> src/structures/graph.rs:57:26
[INFO] [stdout]    |
[INFO] [stdout] 57 |     pub fn update(&self, old: T, new: T) -> bool {todo!()}
[INFO] [stdout]    |                          ^^^ help: if this is intentional, prefix it with an underscore: `_old`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `new`
[INFO] [stdout]   --> src/structures/graph.rs:57:34
[INFO] [stdout]    |
[INFO] [stdout] 57 |     pub fn update(&self, old: T, new: T) -> bool {todo!()}
[INFO] [stdout]    |                                  ^^^ help: if this is intentional, prefix it with an underscore: `_new`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `quarkrs` (lib) due to 1 previous error; 16 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: struct `UnweightedGraph` is never constructed
[INFO] [stdout]   --> src/structures/graph.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct UnweightedGraph<T> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]    = note: `#[deny(unused_unconstructable_pub_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `value` and `arcs` are never read
[INFO] [stdout]  --> src/structures/graph.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct GraphNode<T> {
[INFO] [stdout]   |        --------- fields in this struct
[INFO] [stdout] 4 |     value: T,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 5 |     arcs: Vec<ThreadData<GraphNode<T>>>
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `new_struct`, `add_arc`, and `get_node` are never used
[INFO] [stdout]   --> src/structures/graph.rs:9:12
[INFO] [stdout]    |
[INFO] [stdout]  8 | impl<T> GraphNode<T> {
[INFO] [stdout]    | -------------------- associated items in this implementation
[INFO] [stdout]  9 |     pub fn new(val: T) -> GraphNode<T> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     fn new_struct(val: T) -> ThreadData<GraphNode<T>> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 20 |     pub fn add_arc(&mut self, val: T) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 24 |     pub fn get_node(&self, val: T){todo!()}
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `entry` is never read
[INFO] [stdout]   --> src/structures/graph.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct UnweightedGraph<T> {
[INFO] [stdout]    |            --------------- field in this struct
[INFO] [stdout] 30 |     entry: ThreadData<GraphNode<T>>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `add_subtree` is never used
[INFO] [stdout]   --> src/structures/tree.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl<T> TreeNode<T> {
[INFO] [stdout]    | ------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 28 |     fn add_subtree(&mut self, tree: TreeNode<T>) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `to_string` is never used
[INFO] [stdout]   --> src/structures/linked_list.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout]  9 | / impl<T> ListNode<T> 
[INFO] [stdout] 10 | |     where T: Debug {
[INFO] [stdout]    | |__________________- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 35 |       fn to_string(&self) -> String {format!("{:?}", self.value)}
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `quarkrs` (lib test) due to 1 previous error; 16 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "ad20b57fc1e4149f79b853ef6512449b0d2b3ef1d63949261a6774b18d4df969", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad20b57fc1e4149f79b853ef6512449b0d2b3ef1d63949261a6774b18d4df969", kill_on_drop: false }`
[INFO] [stdout] ad20b57fc1e4149f79b853ef6512449b0d2b3ef1d63949261a6774b18d4df969
