[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] 04b7f5673acd45db1f02a84069bfd2ad0d46f920
[INFO] checking samchristywork/knowledge-graph against master#6f40082313d8374bdf962aba943a712d5322fae6 for pr-117967
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsamchristywork%2Fknowledge-graph" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/samchristywork/knowledge-graph on toolchain 6f40082313d8374bdf962aba943a712d5322fae6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6f40082313d8374bdf962aba943a712d5322fae6" "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-5-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" "+6f40082313d8374bdf962aba943a712d5322fae6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking samchristywork/knowledge-graph against try#57fd74335bb14b59b719dc3cc5bc4257e73f33ce for pr-117967
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsamchristywork%2Fknowledge-graph" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/samchristywork/knowledge-graph on toolchain 57fd74335bb14b59b719dc3cc5bc4257e73f33ce
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+57fd74335bb14b59b719dc3cc5bc4257e73f33ce" "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-5-tc2/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" "+57fd74335bb14b59b719dc3cc5bc4257e73f33ce" "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
[ERROR] error running command: no output for 300 seconds
[INFO] checking samchristywork/knowledge-graph against try#57fd74335bb14b59b719dc3cc5bc4257e73f33ce for pr-117967
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsamchristywork%2Fknowledge-graph" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/samchristywork/knowledge-graph on toolchain 57fd74335bb14b59b719dc3cc5bc4257e73f33ce
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+57fd74335bb14b59b719dc3cc5bc4257e73f33ce" "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-5-tc2/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" "+57fd74335bb14b59b719dc3cc5bc4257e73f33ce" "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-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+57fd74335bb14b59b719dc3cc5bc4257e73f33ce" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 83fda470d3cd003d78bc38cc80f1a92cd3b98cfd33fca6385647d494867f02fa
[INFO] running `Command { std: "docker" "start" "-a" "83fda470d3cd003d78bc38cc80f1a92cd3b98cfd33fca6385647d494867f02fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "83fda470d3cd003d78bc38cc80f1a92cd3b98cfd33fca6385647d494867f02fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "83fda470d3cd003d78bc38cc80f1a92cd3b98cfd33fca6385647d494867f02fa", kill_on_drop: false }`
[INFO] [stdout] 83fda470d3cd003d78bc38cc80f1a92cd3b98cfd33fca6385647d494867f02fa
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+57fd74335bb14b59b719dc3cc5bc4257e73f33ce" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0972fff2b416768e0f4999f3044940bf1bdd4ff11d981d9a86e1cf8d0ac6acf1
[INFO] running `Command { std: "docker" "start" "-a" "0972fff2b416768e0f4999f3044940bf1bdd4ff11d981d9a86e1cf8d0ac6acf1", 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: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: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: 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: 13 warnings emitted
[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: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.08s
[INFO] running `Command { std: "docker" "inspect" "0972fff2b416768e0f4999f3044940bf1bdd4ff11d981d9a86e1cf8d0ac6acf1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0972fff2b416768e0f4999f3044940bf1bdd4ff11d981d9a86e1cf8d0ac6acf1", kill_on_drop: false }`
[INFO] [stdout] 0972fff2b416768e0f4999f3044940bf1bdd4ff11d981d9a86e1cf8d0ac6acf1