[INFO] fetching crate fern_sim_test 0.1.0...
[INFO] testing fern_sim_test-0.1.0 against master#d98a5da813da67eb189387b8ccfb73cf481275d8+rustflags=-Copt-level=3 for pr-138759
[INFO] extracting crate fern_sim_test 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate fern_sim_test 0.1.0
[INFO] finished tweaking crates.io crate fern_sim_test 0.1.0
[INFO] tweaked toml for crates.io crate fern_sim_test 0.1.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate fern_sim_test 0.1.0 on toolchain d98a5da813da67eb189387b8ccfb73cf481275d8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate fern_sim_test 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" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1d0102c9111df59b46ea9b872deff916113cd6cf7f494807f33a3e17ea121583
[INFO] running `Command { std: "docker" "start" "-a" "1d0102c9111df59b46ea9b872deff916113cd6cf7f494807f33a3e17ea121583", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1d0102c9111df59b46ea9b872deff916113cd6cf7f494807f33a3e17ea121583", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d0102c9111df59b46ea9b872deff916113cd6cf7f494807f33a3e17ea121583", kill_on_drop: false }`
[INFO] [stdout] 1d0102c9111df59b46ea9b872deff916113cd6cf7f494807f33a3e17ea121583
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a0230a48aef69c66340700f42db875269c94b319e68eefd70b6aba9886a6e707
[INFO] running `Command { std: "docker" "start" "-a" "a0230a48aef69c66340700f42db875269c94b319e68eefd70b6aba9886a6e707", kill_on_drop: false }`
[INFO] [stderr]    Compiling fern_sim_test v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `time`
[INFO] [stdout]   --> src/simulation.rs:37:38
[INFO] [stdout]    |
[INFO] [stdout] 37 |     pub fn apply_sunlight(&mut self, time: Duration) {
[INFO] [stdout]    |                                      ^^^^ help: if this is intentional, prefix it with an underscore: `_time`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `factory`
[INFO] [stdout]  --> src/spores.rs:9:22
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn produce_spore(factory: &mut i32) -> Spore {
[INFO] [stdout]   |                      ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_factory`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `spore`
[INFO] [stdout]   --> src/spores.rs:13:21
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub(crate) fn genes(spore: &Spore) -> Vec<Gene> {
[INFO] [stdout]    |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_spore`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]   --> src/spores.rs:17:14
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn recombine(parent: &mut Cell) {
[INFO] [stdout]    |              ^^^^^^ help: if this is intentional, prefix it with an underscore: `_parent`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `size` is never read
[INFO] [stdout]  --> src/spores.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Spore {
[INFO] [stdout]   |            ----- field in this struct
[INFO] [stdout] 6 |     size: f64,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `genes` is never used
[INFO] [stdout]   --> src/spores.rs:13:15
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub(crate) fn genes(spore: &Spore) -> Vec<Gene> {
[INFO] [stdout]    |               ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `recombine` is never used
[INFO] [stdout]   --> src/spores.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn recombine(parent: &mut Cell) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cell` is never constructed
[INFO] [stdout]   --> src/spores.rs:22:16
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub struct Cell {
[INFO] [stdout]    |                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `distance_from_origin` is never used
[INFO] [stdout]   --> src/spores.rs:27:16
[INFO] [stdout]    |
[INFO] [stdout] 26 |     impl Cell {
[INFO] [stdout]    |     --------- method in this implementation
[INFO] [stdout] 27 |         pub fn distance_from_origin(&self) -> f64 {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Gene` is never constructed
[INFO] [stdout]   --> src/spores.rs:32:16
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub struct Gene;
[INFO] [stdout]    |                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.53s
[INFO] running `Command { std: "docker" "inspect" "a0230a48aef69c66340700f42db875269c94b319e68eefd70b6aba9886a6e707", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0230a48aef69c66340700f42db875269c94b319e68eefd70b6aba9886a6e707", kill_on_drop: false }`
[INFO] [stdout] a0230a48aef69c66340700f42db875269c94b319e68eefd70b6aba9886a6e707
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2e5705563fb75e9e6f9ffa20c6680d784127bd096f8f6cb6c8b7d0d86735b3e4
[INFO] running `Command { std: "docker" "start" "-a" "2e5705563fb75e9e6f9ffa20c6680d784127bd096f8f6cb6c8b7d0d86735b3e4", kill_on_drop: false }`
[INFO] [stdout] warning: unused variable: `time`
[INFO] [stdout]   --> src/simulation.rs:37:38
[INFO] [stdout]    |
[INFO] [stdout] 37 |     pub fn apply_sunlight(&mut self, time: Duration) {
[INFO] [stdout]    |                                      ^^^^ help: if this is intentional, prefix it with an underscore: `_time`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `factory`
[INFO] [stdout]  --> src/spores.rs:9:22
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn produce_spore(factory: &mut i32) -> Spore {
[INFO] [stdout]   |                      ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_factory`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `spore`
[INFO] [stdout]   --> src/spores.rs:13:21
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub(crate) fn genes(spore: &Spore) -> Vec<Gene> {
[INFO] [stdout]    |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_spore`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]   --> src/spores.rs:17:14
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn recombine(parent: &mut Cell) {
[INFO] [stdout]    |              ^^^^^^ help: if this is intentional, prefix it with an underscore: `_parent`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `size` is never read
[INFO] [stdout]  --> src/spores.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Spore {
[INFO] [stdout]   |            ----- field in this struct
[INFO] [stdout] 6 |     size: f64,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `genes` is never used
[INFO] [stdout]   --> src/spores.rs:13:15
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub(crate) fn genes(spore: &Spore) -> Vec<Gene> {
[INFO] [stdout]    |               ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `recombine` is never used
[INFO] [stdout]   --> src/spores.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn recombine(parent: &mut Cell) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cell` is never constructed
[INFO] [stdout]   --> src/spores.rs:22:16
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub struct Cell {
[INFO] [stdout]    |                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `distance_from_origin` is never used
[INFO] [stdout]   --> src/spores.rs:27:16
[INFO] [stdout]    |
[INFO] [stdout] 26 |     impl Cell {
[INFO] [stdout]    |     --------- method in this implementation
[INFO] [stdout] 27 |         pub fn distance_from_origin(&self) -> f64 {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Gene` is never constructed
[INFO] [stdout]   --> src/spores.rs:32:16
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub struct Gene;
[INFO] [stdout]    |                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling fern_sim_test v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `time`
[INFO] [stdout]   --> src/simulation.rs:37:38
[INFO] [stdout]    |
[INFO] [stdout] 37 |     pub fn apply_sunlight(&mut self, time: Duration) {
[INFO] [stdout]    |                                      ^^^^ help: if this is intentional, prefix it with an underscore: `_time`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `factory`
[INFO] [stdout]  --> src/spores.rs:9:22
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn produce_spore(factory: &mut i32) -> Spore {
[INFO] [stdout]   |                      ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_factory`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `spore`
[INFO] [stdout]   --> src/spores.rs:13:21
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub(crate) fn genes(spore: &Spore) -> Vec<Gene> {
[INFO] [stdout]    |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_spore`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]   --> src/spores.rs:17:14
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn recombine(parent: &mut Cell) {
[INFO] [stdout]    |              ^^^^^^ help: if this is intentional, prefix it with an underscore: `_parent`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `size` is never read
[INFO] [stdout]  --> src/spores.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Spore {
[INFO] [stdout]   |            ----- field in this struct
[INFO] [stdout] 6 |     size: f64,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `genes` is never used
[INFO] [stdout]   --> src/spores.rs:13:15
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub(crate) fn genes(spore: &Spore) -> Vec<Gene> {
[INFO] [stdout]    |               ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `recombine` is never used
[INFO] [stdout]   --> src/spores.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn recombine(parent: &mut Cell) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cell` is never constructed
[INFO] [stdout]   --> src/spores.rs:22:16
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub struct Cell {
[INFO] [stdout]    |                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `distance_from_origin` is never used
[INFO] [stdout]   --> src/spores.rs:27:16
[INFO] [stdout]    |
[INFO] [stdout] 26 |     impl Cell {
[INFO] [stdout]    |     --------- method in this implementation
[INFO] [stdout] 27 |         pub fn distance_from_origin(&self) -> f64 {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Gene` is never constructed
[INFO] [stdout]   --> src/spores.rs:32:16
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub struct Gene;
[INFO] [stdout]    |                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.68s
[INFO] running `Command { std: "docker" "inspect" "2e5705563fb75e9e6f9ffa20c6680d784127bd096f8f6cb6c8b7d0d86735b3e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e5705563fb75e9e6f9ffa20c6680d784127bd096f8f6cb6c8b7d0d86735b3e4", kill_on_drop: false }`
[INFO] [stdout] 2e5705563fb75e9e6f9ffa20c6680d784127bd096f8f6cb6c8b7d0d86735b3e4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6530fe00fcc43bdb3a5f2a84b2173d2820e63d76307d9dfb41f12b52edfbda33
[INFO] running `Command { std: "docker" "start" "-a" "6530fe00fcc43bdb3a5f2a84b2173d2820e63d76307d9dfb41f12b52edfbda33", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `time`
[INFO] [stderr]   --> src/simulation.rs:37:38
[INFO] [stderr]    |
[INFO] [stderr] 37 |     pub fn apply_sunlight(&mut self, time: Duration) {
[INFO] [stdout] 
[INFO] [stderr]    |                                      ^^^^ help: if this is intentional, prefix it with an underscore: `_time`
[INFO] [stdout] running 0 tests
[INFO] [stderr]    |
[INFO] [stdout] 
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stderr] warning: unused variable: `factory`
[INFO] [stderr]  --> src/spores.rs:9:22
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub fn produce_spore(factory: &mut i32) -> Spore {
[INFO] [stderr]   |                      ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_factory`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `spore`
[INFO] [stderr]   --> src/spores.rs:13:21
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub(crate) fn genes(spore: &Spore) -> Vec<Gene> {
[INFO] [stderr]    |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_spore`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `parent`
[INFO] [stderr]   --> src/spores.rs:17:14
[INFO] [stderr]    |
[INFO] [stderr] 17 | fn recombine(parent: &mut Cell) {
[INFO] [stderr]    |              ^^^^^^ help: if this is intentional, prefix it with an underscore: `_parent`
[INFO] [stderr] 
[INFO] [stderr] warning: field `size` is never read
[INFO] [stderr]  --> src/spores.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub struct Spore {
[INFO] [stderr]   |            ----- field in this struct
[INFO] [stderr] 6 |     size: f64,
[INFO] [stderr]   |     ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `genes` is never used
[INFO] [stderr]   --> src/spores.rs:13:15
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub(crate) fn genes(spore: &Spore) -> Vec<Gene> {
[INFO] [stderr]    |               ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `recombine` is never used
[INFO] [stderr]   --> src/spores.rs:17:4
[INFO] [stderr]    |
[INFO] [stderr] 17 | fn recombine(parent: &mut Cell) {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Cell` is never constructed
[INFO] [stderr]   --> src/spores.rs:22:16
[INFO] [stderr]    |
[INFO] [stderr] 22 |     pub struct Cell {
[INFO] [stderr]    |                ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `distance_from_origin` is never used
[INFO] [stderr]   --> src/spores.rs:27:16
[INFO] [stderr]    |
[INFO] [stderr] 26 |     impl Cell {
[INFO] [stderr]    |     --------- method in this implementation
[INFO] [stderr] 27 |         pub fn distance_from_origin(&self) -> f64 {
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Gene` is never constructed
[INFO] [stderr]   --> src/spores.rs:32:16
[INFO] [stderr]    |
[INFO] [stderr] 32 |     pub struct Gene;
[INFO] [stderr]    |                ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `fern_sim_test` (lib) generated 10 warnings
[INFO] [stderr] warning: `fern_sim_test` (lib test) generated 10 warnings (10 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/fern_sim_test-557289786e152593)
[INFO] [stderr]      Running unittests src/bin/efern.rs (/opt/rustwide/target/debug/deps/efern-6aca65713ab124e7)
[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] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test test_fiddlehead_unfurling ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/unfurl.rs (/opt/rustwide/target/debug/deps/unfurl-6150b58dfb18da63)
[INFO] [stderr]    Doc-tests fern_sim_test
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/simulation.rs - simulation::Terrarium::apply_sunlight (line 32) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/simulation.rs - simulation::Terrarium::apply_sunlight (line 32) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `fern_sim`
[INFO] [stdout]  --> src/simulation.rs:33:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use fern_sim::Terrarium;
[INFO] [stdout]   |     ^^^^^^^^ use of unresolved module or unlinked crate `fern_sim`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `fern_sim`, use `cargo add fern_sim` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/simulation.rs - simulation::Terrarium::apply_sunlight (line 32)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.15s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "6530fe00fcc43bdb3a5f2a84b2173d2820e63d76307d9dfb41f12b52edfbda33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6530fe00fcc43bdb3a5f2a84b2173d2820e63d76307d9dfb41f12b52edfbda33", kill_on_drop: false }`
[INFO] [stdout] 6530fe00fcc43bdb3a5f2a84b2173d2820e63d76307d9dfb41f12b52edfbda33
