[INFO] cloning repository https://github.com/samchristywork/knowledge-graph
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/samchristywork/knowledge-graph" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsamchristywork%2Fknowledge-graph", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsamchristywork%2Fknowledge-graph'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 36f14cc0fc8055e750926913cd7347524f8f48a1
[INFO] checking samchristywork/knowledge-graph against master#9f48dedc9763334a587c66558974635807a113ed for pr-137394
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsamchristywork%2Fknowledge-graph" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/samchristywork/knowledge-graph on toolchain 9f48dedc9763334a587c66558974635807a113ed
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9f48dedc9763334a587c66558974635807a113ed" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/samchristywork/knowledge-graph
[INFO] finished tweaking git repo https://github.com/samchristywork/knowledge-graph
[INFO] tweaked toml for git repo https://github.com/samchristywork/knowledge-graph written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/samchristywork/knowledge-graph 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" "+9f48dedc9763334a587c66558974635807a113ed" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+9f48dedc9763334a587c66558974635807a113ed" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8bd9e997c0769d621538e61ac1d100b6e10a996e18c58b0d850ff43a8049e497
[INFO] running `Command { std: "docker" "start" "-a" "8bd9e997c0769d621538e61ac1d100b6e10a996e18c58b0d850ff43a8049e497", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8bd9e997c0769d621538e61ac1d100b6e10a996e18c58b0d850ff43a8049e497", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8bd9e997c0769d621538e61ac1d100b6e10a996e18c58b0d850ff43a8049e497", kill_on_drop: false }`
[INFO] [stdout] 8bd9e997c0769d621538e61ac1d100b6e10a996e18c58b0d850ff43a8049e497
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+9f48dedc9763334a587c66558974635807a113ed" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0e2bc4a56267b791d35d8d964d3b989b3d99dce9d3d65478efaa497d32829c74
[INFO] running `Command { std: "docker" "start" "-a" "0e2bc4a56267b791d35d8d964d3b989b3d99dce9d3d65478efaa497d32829c74", kill_on_drop: false }`
[INFO] [stderr]     Checking knowledge-graph v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `path`
[INFO] [stdout]   --> src/graph.rs:12:26
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn new_from_file(path: &Path) -> Self {
[INFO] [stdout]    |                          ^^^^ help: if this is intentional, prefix it with an underscore: `_path`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `path`
[INFO] [stdout]   --> src/graph.rs:12:26
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn new_from_file(path: &Path) -> Self {
[INFO] [stdout]    |                          ^^^^ help: if this is intentional, prefix it with an underscore: `_path`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `path`
[INFO] [stdout]   --> src/graph.rs:20:27
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn to_file(&self, path: &Path) {}
[INFO] [stdout]    |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_path`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/graph.rs:22:32
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn add_relation(&self, a: node::Node, b: node::Node, relation: relation::Relation) {}
[INFO] [stdout]    |                                ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/graph.rs:22:47
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn add_relation(&self, a: node::Node, b: node::Node, relation: relation::Relation) {}
[INFO] [stdout]    |                                               ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `relation`
[INFO] [stdout]   --> src/graph.rs:22:62
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn add_relation(&self, a: node::Node, b: node::Node, relation: relation::Relation) {}
[INFO] [stdout]    |                                                              ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_relation`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `path`
[INFO] [stdout]   --> src/graph.rs:20:27
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn to_file(&self, path: &Path) {}
[INFO] [stdout]    |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_path`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/graph.rs:22:32
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn add_relation(&self, a: node::Node, b: node::Node, relation: relation::Relation) {}
[INFO] [stdout]    |                                ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/graph.rs:22:47
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn add_relation(&self, a: node::Node, b: node::Node, relation: relation::Relation) {}
[INFO] [stdout]    |                                               ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `relation`
[INFO] [stdout]   --> src/graph.rs:22:62
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn add_relation(&self, a: node::Node, b: node::Node, relation: relation::Relation) {}
[INFO] [stdout]    |                                                              ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_relation`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name`, `nodes`, and `relations` are never read
[INFO] [stdout]  --> src/graph.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Graph<'a> {
[INFO] [stdout]   |            ----- fields in this struct
[INFO] [stdout] 6 |     name: &'a str,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 7 |     nodes: Vec<node::Node<'a>>,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 8 |     relations: Vec<relation::Relation<'a>>,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Image` is never constructed
[INFO] [stdout]  --> src/image.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Image {}
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Markdown` is never constructed
[INFO] [stdout]  --> src/markdown.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Markdown {}
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]  --> src/node.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Node<'a> {
[INFO] [stdout]   |            ---- field in this struct
[INFO] [stdout] 2 |     name: &'a str,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]  --> src/relation.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Relation<'a> {
[INFO] [stdout]   |            -------- field in this struct
[INFO] [stdout] 2 |     name: &'a str,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Serializer` is never constructed
[INFO] [stdout]  --> src/serial.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Serializer {}
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Deserializer` is never constructed
[INFO] [stdout]  --> src/serial.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Deserializer {}
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `UI` is never constructed
[INFO] [stdout]  --> src/ui.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct UI {}
[INFO] [stdout]   |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name`, `nodes`, and `relations` are never read
[INFO] [stdout]  --> src/graph.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Graph<'a> {
[INFO] [stdout]   |            ----- fields in this struct
[INFO] [stdout] 6 |     name: &'a str,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 7 |     nodes: Vec<node::Node<'a>>,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 8 |     relations: Vec<relation::Relation<'a>>,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Image` is never constructed
[INFO] [stdout]  --> src/image.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Image {}
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Markdown` is never constructed
[INFO] [stdout]  --> src/markdown.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Markdown {}
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]  --> src/node.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Node<'a> {
[INFO] [stdout]   |            ---- field in this struct
[INFO] [stdout] 2 |     name: &'a str,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]  --> src/relation.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Relation<'a> {
[INFO] [stdout]   |            -------- field in this struct
[INFO] [stdout] 2 |     name: &'a str,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Serializer` is never constructed
[INFO] [stdout]  --> src/serial.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Serializer {}
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Deserializer` is never constructed
[INFO] [stdout]  --> src/serial.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Deserializer {}
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `UI` is never constructed
[INFO] [stdout]  --> src/ui.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct UI {}
[INFO] [stdout]   |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] running `Command { std: "docker" "inspect" "0e2bc4a56267b791d35d8d964d3b989b3d99dce9d3d65478efaa497d32829c74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e2bc4a56267b791d35d8d964d3b989b3d99dce9d3d65478efaa497d32829c74", kill_on_drop: false }`
[INFO] [stdout] 0e2bc4a56267b791d35d8d964d3b989b3d99dce9d3d65478efaa497d32829c74