[INFO] fetching crate tributary 0.1.0...
[INFO] testing tributary-0.1.0 against 1.90.0 for beta-1.91-3
[INFO] extracting crate tributary 0.1.0 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate tributary 0.1.0
[INFO] finished tweaking crates.io crate tributary 0.1.0
[INFO] tweaked toml for crates.io crate tributary 0.1.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate tributary 0.1.0 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate tributary 0.1.0 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" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded scratch v1.0.3
[INFO] [stderr]   Downloaded uuid v1.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cd64b7ce8143e58ea273b645770980381688945053dc8681f644e210e00d14fe
[INFO] running `Command { std: "docker" "start" "-a" "cd64b7ce8143e58ea273b645770980381688945053dc8681f644e210e00d14fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cd64b7ce8143e58ea273b645770980381688945053dc8681f644e210e00d14fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd64b7ce8143e58ea273b645770980381688945053dc8681f644e210e00d14fe", kill_on_drop: false }`
[INFO] [stdout] cd64b7ce8143e58ea273b645770980381688945053dc8681f644e210e00d14fe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a393b950ada080dd654cda4947471c1781b46e58d696548a2ebbc8b93d560e65
[INFO] running `Command { std: "docker" "start" "-a" "a393b950ada080dd654cda4947471c1781b46e58d696548a2ebbc8b93d560e65", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.51
[INFO] [stderr]    Compiling unicode-ident v1.0.6
[INFO] [stderr]    Compiling quote v1.0.23
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling serde_derive v1.0.152
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling serde v1.0.152
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling iana-time-zone v0.1.53
[INFO] [stderr]    Compiling getrandom v0.2.8
[INFO] [stderr]    Compiling time v0.1.45
[INFO] [stderr]    Compiling uuid v1.3.0
[INFO] [stderr]    Compiling chrono v0.4.23
[INFO] [stderr]    Compiling tributary v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/lib.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     n: &Node<'a, T, U>,
[INFO] [stdout]    |     ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `callable` is never read
[INFO] [stdout]   --> src/lib.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct NodeInst<'a, T, U> {
[INFO] [stdout]    |            -------- field in this struct
[INFO] [stdout] 16 |     callable: Callable<'a, T, U>,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `inst` is never read
[INFO] [stdout]   --> src/lib.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct Node<'a, T, U> {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 20 |     inst: RefCell<NodeInst<'a, T, U>>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `Print` should have a snake case name
[INFO] [stdout]   --> src/lib.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub fn Print<'a, T, U: std::fmt::Display>(
[INFO] [stdout]    |        ^^^^^ help: convert the identifier to snake case: `print`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around pattern
[INFO] [stdout]   --> src/main.rs:23:26
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let n4 = Node::from(|(x)| -> (u32, u32) {
[INFO] [stdout]    |                          ^ ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 23 -     let n4 = Node::from(|(x)| -> (u32, u32) {
[INFO] [stdout] 23 +     let n4 = Node::from(|x| -> (u32, u32) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n4`
[INFO] [stdout]  --> src/main.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let n4 = Node::from(|x: u32| -> () {});
[INFO] [stdout]   |         ^^ help: if this is intentional, prefix it with an underscore: `_n4`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n4`
[INFO] [stdout]   --> src/main.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let n4 = Node::from(|x: u32| -> u32 {
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_n4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n4`
[INFO] [stdout]   --> src/main.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let n4 = Node::from(|(x, y)| -> (u32, u32) {
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_n4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n4`
[INFO] [stdout]   --> src/main.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let n4 = Node::from(|(x)| -> (u32, u32) {
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_n4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n4`
[INFO] [stdout]   --> src/main.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let n4 = Node::from(|()| -> (u32, u32) {
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_n4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]  --> src/main.rs:6:26
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let n4 = Node::from(|x: u32| -> () {});
[INFO] [stdout]   |                          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.01s
[INFO] running `Command { std: "docker" "inspect" "a393b950ada080dd654cda4947471c1781b46e58d696548a2ebbc8b93d560e65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a393b950ada080dd654cda4947471c1781b46e58d696548a2ebbc8b93d560e65", kill_on_drop: false }`
[INFO] [stdout] a393b950ada080dd654cda4947471c1781b46e58d696548a2ebbc8b93d560e65
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5e65095ccd993765c6867416c2db6c7ff256308751cd0628446fdb553578a9b3
[INFO] running `Command { std: "docker" "start" "-a" "5e65095ccd993765c6867416c2db6c7ff256308751cd0628446fdb553578a9b3", kill_on_drop: false }`
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/lib.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     n: &Node<'a, T, U>,
[INFO] [stdout]    |     ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `callable` is never read
[INFO] [stdout]   --> src/lib.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct NodeInst<'a, T, U> {
[INFO] [stdout]    |            -------- field in this struct
[INFO] [stdout] 16 |     callable: Callable<'a, T, U>,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `inst` is never read
[INFO] [stdout]   --> src/lib.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct Node<'a, T, U> {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 20 |     inst: RefCell<NodeInst<'a, T, U>>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `Print` should have a snake case name
[INFO] [stdout]   --> src/lib.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub fn Print<'a, T, U: std::fmt::Display>(
[INFO] [stdout]    |        ^^^^^ help: convert the identifier to snake case: `print`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling tributary v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/lib.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     n: &Node<'a, T, U>,
[INFO] [stdout]    |     ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `callable` is never read
[INFO] [stdout]   --> src/lib.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct NodeInst<'a, T, U> {
[INFO] [stdout]    |            -------- field in this struct
[INFO] [stdout] 16 |     callable: Callable<'a, T, U>,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `inst` is never read
[INFO] [stdout]   --> src/lib.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct Node<'a, T, U> {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 20 |     inst: RefCell<NodeInst<'a, T, U>>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `Print` should have a snake case name
[INFO] [stdout]   --> src/lib.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub fn Print<'a, T, U: std::fmt::Display>(
[INFO] [stdout]    |        ^^^^^ help: convert the identifier to snake case: `print`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around pattern
[INFO] [stdout]   --> src/main.rs:23:26
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let n4 = Node::from(|(x)| -> (u32, u32) {
[INFO] [stdout]    |                          ^ ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 23 -     let n4 = Node::from(|(x)| -> (u32, u32) {
[INFO] [stdout] 23 +     let n4 = Node::from(|x| -> (u32, u32) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n4`
[INFO] [stdout]  --> src/main.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let n4 = Node::from(|x: u32| -> () {});
[INFO] [stdout]   |         ^^ help: if this is intentional, prefix it with an underscore: `_n4`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n4`
[INFO] [stdout]   --> src/main.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let n4 = Node::from(|x: u32| -> u32 {
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_n4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n4`
[INFO] [stdout]   --> src/main.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let n4 = Node::from(|(x, y)| -> (u32, u32) {
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_n4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n4`
[INFO] [stdout]   --> src/main.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let n4 = Node::from(|(x)| -> (u32, u32) {
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_n4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n4`
[INFO] [stdout]   --> src/main.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let n4 = Node::from(|()| -> (u32, u32) {
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_n4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]  --> src/main.rs:6:26
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let n4 = Node::from(|x: u32| -> () {});
[INFO] [stdout]   |                          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.40s
[INFO] running `Command { std: "docker" "inspect" "5e65095ccd993765c6867416c2db6c7ff256308751cd0628446fdb553578a9b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e65095ccd993765c6867416c2db6c7ff256308751cd0628446fdb553578a9b3", kill_on_drop: false }`
[INFO] [stdout] 5e65095ccd993765c6867416c2db6c7ff256308751cd0628446fdb553578a9b3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 35291ea43704a3e50905be602e12753649451e157bdfa5c4e467ea1efaa401b4
[INFO] running `Command { std: "docker" "start" "-a" "35291ea43704a3e50905be602e12753649451e157bdfa5c4e467ea1efaa401b4", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]   --> src/lib.rs:48:5
[INFO] [stderr]    |
[INFO] [stderr] 48 |     n: &Node<'a, T, U>,
[INFO] [stderr]    |     ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `callable` is never read
[INFO] [stderr]   --> src/lib.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 15 | pub struct NodeInst<'a, T, U> {
[INFO] [stderr]    |            -------- field in this struct
[INFO] [stderr] 16 |     callable: Callable<'a, T, U>,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `inst` is never read
[INFO] [stderr]   --> src/lib.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub struct Node<'a, T, U> {
[INFO] [stderr]    |            ---- field in this struct
[INFO] [stderr] 20 |     inst: RefCell<NodeInst<'a, T, U>>,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `Print` should have a snake case name
[INFO] [stderr]   --> src/lib.rs:46:8
[INFO] [stderr]    |
[INFO] [stderr] 46 | pub fn Print<'a, T, U: std::fmt::Display>(
[INFO] [stderr]    |        ^^^^^ help: convert the identifier to snake case: `print`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `tributary` (lib) generated 4 warnings
[INFO] [stderr] warning: `tributary` (lib test) generated 4 warnings (4 duplicates)
[INFO] [stderr] warning: unnecessary parentheses around pattern
[INFO] [stderr]   --> src/main.rs:23:26
[INFO] [stderr]    |
[INFO] [stderr] 23 |     let n4 = Node::from(|(x)| -> (u32, u32) {
[INFO] [stderr]    |                          ^ ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 23 -     let n4 = Node::from(|(x)| -> (u32, u32) {
[INFO] [stderr] 23 +     let n4 = Node::from(|x| -> (u32, u32) {
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n4`
[INFO] [stderr]  --> src/main.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let n4 = Node::from(|x: u32| -> () {});
[INFO] [stderr]   |         ^^ help: if this is intentional, prefix it with an underscore: `_n4`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n4`
[INFO] [stderr]   --> src/main.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let n4 = Node::from(|x: u32| -> u32 {
[INFO] [stderr]    |         ^^ help: if this is intentional, prefix it with an underscore: `_n4`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n4`
[INFO] [stderr]   --> src/main.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 20 |     let n4 = Node::from(|(x, y)| -> (u32, u32) {
[INFO] [stderr]    |         ^^ help: if this is intentional, prefix it with an underscore: `_n4`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n4`
[INFO] [stderr]   --> src/main.rs:23:9
[INFO] [stderr]    |
[INFO] [stderr] 23 |     let n4 = Node::from(|(x)| -> (u32, u32) {
[INFO] [stderr]    |         ^^ help: if this is intentional, prefix it with an underscore: `_n4`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n4`
[INFO] [stderr]   --> src/main.rs:26:9
[INFO] [stderr]    |
[INFO] [stderr] 26 |     let n4 = Node::from(|()| -> (u32, u32) {
[INFO] [stderr]    |         ^^ help: if this is intentional, prefix it with an underscore: `_n4`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]  --> src/main.rs:6:26
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let n4 = Node::from(|x: u32| -> () {});
[INFO] [stderr]   |                          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: `tributary` (bin "tributary" test) generated 7 warnings (run `cargo fix --bin "tributary" --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/tributary-46b194b78e21e419)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/tributary-f12545211bb34d53)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests tributary
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "35291ea43704a3e50905be602e12753649451e157bdfa5c4e467ea1efaa401b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35291ea43704a3e50905be602e12753649451e157bdfa5c4e467ea1efaa401b4", kill_on_drop: false }`
[INFO] [stdout] 35291ea43704a3e50905be602e12753649451e157bdfa5c4e467ea1efaa401b4