[INFO] updating cached repository rikshot/testbed
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/rikshot/testbed
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/rikshot/testbed" "work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/rikshot/testbed"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/rikshot/testbed'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/rikshot/testbed" "work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/rikshot/testbed"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/rikshot/testbed'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4677de644f3313e5cc0d8c7bf85a6b7d02c06b72
[INFO] sha for GitHub repo rikshot/testbed: 4677de644f3313e5cc0d8c7bf85a6b7d02c06b72
[INFO] validating manifest of rikshot/testbed on toolchain master#0f88167f89fffe321590c5148f21b7d51d44388d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of rikshot/testbed on toolchain try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing rikshot/testbed
[INFO] finished frobbing rikshot/testbed
[INFO] frobbed toml for rikshot/testbed written to work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/rikshot/testbed/Cargo.toml
[INFO] started frobbing rikshot/testbed
[INFO] finished frobbing rikshot/testbed
[INFO] frobbed toml for rikshot/testbed written to work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/rikshot/testbed/Cargo.toml
[INFO] crate rikshot/testbed already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking rikshot/testbed against try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b for pr-58948
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58948/worker-4/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/rikshot/testbed:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 30eb4ecee9769087833c0b7baa38dc136808138bf35283d42c9d04a92183be6f
[INFO] running `"docker" "start" "-a" "30eb4ecee9769087833c0b7baa38dc136808138bf35283d42c9d04a92183be6f"`
[INFO] [stderr]     Checking num-traits v0.2.0
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking serde_json v1.0.9
[INFO] [stderr]     Checking mandelbrot v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `CString`
[INFO] [stderr]   --> src/rs/mandelbrot.rs:11:16
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::ffi::{CString, CStr};
[INFO] [stderr]    |                ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `config`
[INFO] [stderr]    --> src/rs/mandelbrot.rs:135:9
[INFO] [stderr]     |
[INFO] [stderr] 135 |     let config: Config = serde_json::from_str(config_json.to_str().unwrap()).unwrap();
[INFO] [stderr]     |         ^^^^^^ help: consider prefixing with an underscore: `_config`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `raw_chunk_config`
[INFO] [stderr]    --> src/rs/mandelbrot.rs:133:66
[INFO] [stderr]     |
[INFO] [stderr] 133 | pub unsafe extern "C" fn iterateChunk(raw_config: *const c_char, raw_chunk_config: *const c_char) -> u32 {
[INFO] [stderr]     |                                                                  ^^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_raw_chunk_config`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `config`
[INFO] [stderr]    --> src/rs/mandelbrot.rs:209:9
[INFO] [stderr]     |
[INFO] [stderr] 209 |     let config: Config = serde_json::from_str(config_json.to_str().unwrap()).unwrap();
[INFO] [stderr]     |         ^^^^^^ help: consider prefixing with an underscore: `_config`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `chunk_config`
[INFO] [stderr]    --> src/rs/mandelbrot.rs:212:9
[INFO] [stderr]     |
[INFO] [stderr] 212 |     let chunk_config: ChunkConfig = serde_json::from_str(chunk_config_json.to_str().unwrap()).unwrap();
[INFO] [stderr]     |         ^^^^^^^^^^^^ help: consider prefixing with an underscore: `_chunk_config`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `buffers`
[INFO] [stderr]    --> src/rs/mandelbrot.rs:207:97
[INFO] [stderr]     |
[INFO] [stderr] 207 | pub unsafe extern "C" fn colorChunk(raw_config: *const c_char, raw_chunk_config: *const c_char, buffers: Buffers, total: u32) {
[INFO] [stderr]     |                                                                                                 ^^^^^^^ help: consider prefixing with an underscore: `_buffers`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `total`
[INFO] [stderr]    --> src/rs/mandelbrot.rs:207:115
[INFO] [stderr]     |
[INFO] [stderr] 207 | pub unsafe extern "C" fn colorChunk(raw_config: *const c_char, raw_chunk_config: *const c_char, buffers: Buffers, total: u32) {
[INFO] [stderr]     |                                                                                                                   ^^^^^ help: consider prefixing with an underscore: `_total`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `config`
[INFO] [stderr]    --> src/rs/mandelbrot.rs:135:9
[INFO] [stderr]     |
[INFO] [stderr] 135 |     let config: Config = serde_json::from_str(config_json.to_str().unwrap()).unwrap();
[INFO] [stderr]     |         ^^^^^^ help: consider prefixing with an underscore: `_config`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `raw_chunk_config`
[INFO] [stderr]    --> src/rs/mandelbrot.rs:133:66
[INFO] [stderr]     |
[INFO] [stderr] 133 | pub unsafe extern "C" fn iterateChunk(raw_config: *const c_char, raw_chunk_config: *const c_char) -> u32 {
[INFO] [stderr]     |                                                                  ^^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_raw_chunk_config`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `config`
[INFO] [stderr]    --> src/rs/mandelbrot.rs:209:9
[INFO] [stderr]     |
[INFO] [stderr] 209 |     let config: Config = serde_json::from_str(config_json.to_str().unwrap()).unwrap();
[INFO] [stderr]     |         ^^^^^^ help: consider prefixing with an underscore: `_config`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `chunk_config`
[INFO] [stderr]    --> src/rs/mandelbrot.rs:212:9
[INFO] [stderr]     |
[INFO] [stderr] 212 |     let chunk_config: ChunkConfig = serde_json::from_str(chunk_config_json.to_str().unwrap()).unwrap();
[INFO] [stderr]     |         ^^^^^^^^^^^^ help: consider prefixing with an underscore: `_chunk_config`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `buffers`
[INFO] [stderr]    --> src/rs/mandelbrot.rs:207:97
[INFO] [stderr]     |
[INFO] [stderr] 207 | pub unsafe extern "C" fn colorChunk(raw_config: *const c_char, raw_chunk_config: *const c_char, buffers: Buffers, total: u32) {
[INFO] [stderr]     |                                                                                                 ^^^^^^^ help: consider prefixing with an underscore: `_buffers`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `total`
[INFO] [stderr]    --> src/rs/mandelbrot.rs:207:115
[INFO] [stderr]     |
[INFO] [stderr] 207 | pub unsafe extern "C" fn colorChunk(raw_config: *const c_char, raw_chunk_config: *const c_char, buffers: Buffers, total: u32) {
[INFO] [stderr]     |                                                                                                                   ^^^^^ help: consider prefixing with an underscore: `_total`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/rs/mandelbrot.rs:82:5
[INFO] [stderr]    |
[INFO] [stderr] 82 |     pub fn new(min: T, max: T) -> NumberRange<T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `scale`
[INFO] [stderr]   --> src/rs/mandelbrot.rs:90:5
[INFO] [stderr]    |
[INFO] [stderr] 90 |     pub fn scale(input: &NumberRange<T>, value: T, output: &NumberRange<T>) -> T {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Color`
[INFO] [stderr]   --> src/rs/mandelbrot.rs:96:1
[INFO] [stderr]    |
[INFO] [stderr] 96 | struct Color {
[INFO] [stderr]    | ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `black`
[INFO] [stderr]    --> src/rs/mandelbrot.rs:106:5
[INFO] [stderr]     |
[INFO] [stderr] 106 |     pub fn black() -> &'static Color {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `BLACK`
[INFO] [stderr]    --> src/rs/mandelbrot.rs:107:9
[INFO] [stderr]     |
[INFO] [stderr] 107 |         static BLACK: Color = Color {red: 0, green: 0, blue: 0, alpha: 0xFF, abgr: 0};
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/rs/mandelbrot.rs:111:5
[INFO] [stderr]     |
[INFO] [stderr] 111 |     pub fn new(red: u8, green: u8, blue: u8, alpha: u8) -> Color {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `lerp`
[INFO] [stderr]    --> src/rs/mandelbrot.rs:121:5
[INFO] [stderr]     |
[INFO] [stderr] 121 |     pub fn lerp(color1: &Color, color2: &Color, value: f64) -> Color {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/rs/mandelbrot.rs:82:5
[INFO] [stderr]    |
[INFO] [stderr] 82 |     pub fn new(min: T, max: T) -> NumberRange<T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `scale`
[INFO] [stderr]   --> src/rs/mandelbrot.rs:90:5
[INFO] [stderr]    |
[INFO] [stderr] 90 |     pub fn scale(input: &NumberRange<T>, value: T, output: &NumberRange<T>) -> T {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Color`
[INFO] [stderr]   --> src/rs/mandelbrot.rs:96:1
[INFO] [stderr]    |
[INFO] [stderr] 96 | struct Color {
[INFO] [stderr]    | ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `black`
[INFO] [stderr]    --> src/rs/mandelbrot.rs:106:5
[INFO] [stderr]     |
[INFO] [stderr] 106 |     pub fn black() -> &'static Color {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `BLACK`
[INFO] [stderr]    --> src/rs/mandelbrot.rs:107:9
[INFO] [stderr]     |
[INFO] [stderr] 107 |         static BLACK: Color = Color {red: 0, green: 0, blue: 0, alpha: 0xFF, abgr: 0};
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/rs/mandelbrot.rs:111:5
[INFO] [stderr]     |
[INFO] [stderr] 111 |     pub fn new(red: u8, green: u8, blue: u8, alpha: u8) -> Color {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `lerp`
[INFO] [stderr]    --> src/rs/mandelbrot.rs:121:5
[INFO] [stderr]     |
[INFO] [stderr] 121 |     pub fn lerp(color1: &Color, color2: &Color, value: f64) -> Color {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.27s
[INFO] running `"docker" "inspect" "30eb4ecee9769087833c0b7baa38dc136808138bf35283d42c9d04a92183be6f"`
[INFO] running `"docker" "rm" "-f" "30eb4ecee9769087833c0b7baa38dc136808138bf35283d42c9d04a92183be6f"`
[INFO] [stdout] 30eb4ecee9769087833c0b7baa38dc136808138bf35283d42c9d04a92183be6f