[INFO] updating cached repository https://github.com/pearisgreen/cplot
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8a7b24c449fc1809e4596947a9c10cf58b26f59b
[INFO] checking pearisgreen/cplot against try#ea663bba38739867a4b75ac820991b4f5d093c3b for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpearisgreen%2Fcplot" "/workspace/builds/worker-13/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pearisgreen/cplot on toolchain ea663bba38739867a4b75ac820991b4f5d093c3b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/pearisgreen/cplot
[INFO] finished tweaking git repo https://github.com/pearisgreen/cplot
[INFO] tweaked toml for git repo https://github.com/pearisgreen/cplot written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/pearisgreen/cplot already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c3c93590984f06e756f748bbc4f5fd7b69e7f713248f5da992aca02c9bb54658
[INFO] running `"docker" "start" "-a" "c3c93590984f06e756f748bbc4f5fd7b69e7f713248f5da992aca02c9bb54658"`
[INFO] [stderr]    Compiling syn v0.15.30
[INFO] [stderr]     Checking draw_state v0.8.0
[INFO] [stderr]    Compiling libloading v0.5.0
[INFO] [stderr]    Compiling gl_generator v0.9.0
[INFO] [stderr]    Compiling wayland-scanner v0.21.12
[INFO] [stderr]     Checking num-rational v0.2.1
[INFO] [stderr]     Checking num-bigint v0.1.44
[INFO] [stderr]     Checking uuid v0.6.5
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]     Checking png v0.14.0
[INFO] [stderr]     Checking piston2d-graphics v0.30.0
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking dlib v0.4.1
[INFO] [stderr]    Compiling palette v0.2.1
[INFO] [stderr]     Checking wayland-sys v0.21.12
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]    Compiling gfx_gl v0.5.0
[INFO] [stderr]     Checking wayland-commons v0.21.12
[INFO] [stderr]    Compiling wayland-client v0.21.12
[INFO] [stderr]    Compiling wayland-protocols v0.21.12
[INFO] [stderr]     Checking smithay-client-toolkit v0.4.5
[INFO] [stderr]    Compiling serde_derive v1.0.90
[INFO] [stderr]    Compiling derivative v1.0.2
[INFO] [stderr]    Compiling num-derive v0.2.4
[INFO] [stderr]     Checking winit v0.18.1
[INFO] [stderr]     Checking tiff v0.2.2
[INFO] [stderr]     Checking gfx_core v0.8.3
[INFO] [stderr]     Checking image v0.21.0
[INFO] [stderr]     Checking glutin v0.19.0
[INFO] [stderr]     Checking pistoncore-input v0.24.0
[INFO] [stderr]     Checking pistoncore-window v0.37.0
[INFO] [stderr]     Checking piston-ai_behavior v0.27.0
[INFO] [stderr]     Checking pistoncore-event_loop v0.42.0
[INFO] [stderr]     Checking pistoncore-glutin_window v0.54.0
[INFO] [stderr]     Checking piston2d-sprite v0.50.0
[INFO] [stderr]     Checking piston v0.42.0
[INFO] [stderr]     Checking gfx v0.17.1
[INFO] [stderr]     Checking gfx_device_gl v0.15.5
[INFO] [stderr]     Checking piston-gfx_texture v0.35.0
[INFO] [stderr]     Checking piston2d-gfx_graphics v0.56.0
[INFO] [stderr]     Checking piston_window v0.89.0
[INFO] [stderr]     Checking cplot v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `std::f64::consts::PI`
[INFO] [stderr]  --> src/plot.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::f64::consts::PI;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type `Image_Buffer` should have an upper camel case name
[INFO] [stderr]   --> src/plot.rs:17:6
[INFO] [stderr]    |
[INFO] [stderr] 17 | type Image_Buffer = im::ImageBuffer<Rgba<u8>, Vec<u8>>;
[INFO] [stderr]    |      ^^^^^^^^^^^^ help: convert the identifier to upper camel case: `ImageBuffer`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `r_a`
[INFO] [stderr]   --> src/main.rs:58:21
[INFO] [stderr]    |
[INFO] [stderr] 58 |         if let Some(r_a) = e.render_args() {
[INFO] [stderr]    |                     ^^^ help: consider prefixing with an underscore: `_r_a`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `button`
[INFO] [stderr]   --> src/main.rs:65:21
[INFO] [stderr]    |
[INFO] [stderr] 65 |         if let Some(button) = e.press_args() {
[INFO] [stderr]    |                     ^^^^^^ help: consider prefixing with an underscore: `_button`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `u_a`
[INFO] [stderr]   --> src/main.rs:68:21
[INFO] [stderr]    |
[INFO] [stderr] 68 |         if let Some(u_a) = e.update_args() {
[INFO] [stderr]    |                     ^^^ help: consider prefixing with an underscore: `_u_a`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `val` is never read
[INFO] [stderr]   --> src/plot.rs:34:17
[INFO] [stderr]    |
[INFO] [stderr] 34 |         let mut val: f64 = 0.0;
[INFO] [stderr]    |                 ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `canvas`
[INFO] [stderr]   --> src/plot.rs:60:25
[INFO] [stderr]    |
[INFO] [stderr] 60 |     fn draw_grid(&self, canvas: &mut Image_Buffer) {
[INFO] [stderr]    |                         ^^^^^^ help: consider prefixing with an underscore: `_canvas`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `sin`
[INFO] [stderr]   --> src/complex.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 |     pub fn sin(n: Cpx) -> Cpx {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `tan`
[INFO] [stderr]   --> src/complex.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     pub fn tan(n: Cpx) -> Option<Cpx> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::f64::consts::PI`
[INFO] [stderr]  --> src/plot.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::f64::consts::PI;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type `Image_Buffer` should have an upper camel case name
[INFO] [stderr]   --> src/plot.rs:17:6
[INFO] [stderr]    |
[INFO] [stderr] 17 | type Image_Buffer = im::ImageBuffer<Rgba<u8>, Vec<u8>>;
[INFO] [stderr]    |      ^^^^^^^^^^^^ help: convert the identifier to upper camel case: `ImageBuffer`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `r_a`
[INFO] [stderr]   --> src/main.rs:58:21
[INFO] [stderr]    |
[INFO] [stderr] 58 |         if let Some(r_a) = e.render_args() {
[INFO] [stderr]    |                     ^^^ help: consider prefixing with an underscore: `_r_a`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `button`
[INFO] [stderr]   --> src/main.rs:65:21
[INFO] [stderr]    |
[INFO] [stderr] 65 |         if let Some(button) = e.press_args() {
[INFO] [stderr]    |                     ^^^^^^ help: consider prefixing with an underscore: `_button`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `u_a`
[INFO] [stderr]   --> src/main.rs:68:21
[INFO] [stderr]    |
[INFO] [stderr] 68 |         if let Some(u_a) = e.update_args() {
[INFO] [stderr]    |                     ^^^ help: consider prefixing with an underscore: `_u_a`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `val` is never read
[INFO] [stderr]   --> src/plot.rs:34:17
[INFO] [stderr]    |
[INFO] [stderr] 34 |         let mut val: f64 = 0.0;
[INFO] [stderr]    |                 ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `canvas`
[INFO] [stderr]   --> src/plot.rs:60:25
[INFO] [stderr]    |
[INFO] [stderr] 60 |     fn draw_grid(&self, canvas: &mut Image_Buffer) {
[INFO] [stderr]    |                         ^^^^^^ help: consider prefixing with an underscore: `_canvas`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `sin`
[INFO] [stderr]   --> src/complex.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 |     pub fn sin(n: Cpx) -> Cpx {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `tan`
[INFO] [stderr]   --> src/complex.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     pub fn tan(n: Cpx) -> Option<Cpx> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 37s
[INFO] running `"docker" "inspect" "c3c93590984f06e756f748bbc4f5fd7b69e7f713248f5da992aca02c9bb54658"`
[INFO] running `"docker" "rm" "-f" "c3c93590984f06e756f748bbc4f5fd7b69e7f713248f5da992aca02c9bb54658"`
[INFO] [stdout] c3c93590984f06e756f748bbc4f5fd7b69e7f713248f5da992aca02c9bb54658