[INFO] cloning repository https://github.com/malloc-man/ray-tracer [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/malloc-man/ray-tracer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmalloc-man%2Fray-tracer", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmalloc-man%2Fray-tracer'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 4d76fb1df633995b7a7bdf7e227a0b8bc34f34f9 [INFO] checking malloc-man/ray-tracer against master#18a6d911caba59605eb03db1452848a85d2e5879 for pr-112743 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmalloc-man%2Fray-tracer" "/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/malloc-man/ray-tracer on toolchain 18a6d911caba59605eb03db1452848a85d2e5879 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+18a6d911caba59605eb03db1452848a85d2e5879" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/malloc-man/ray-tracer [INFO] finished tweaking git repo https://github.com/malloc-man/ray-tracer [INFO] tweaked toml for git repo https://github.com/malloc-man/ray-tracer written to /workspace/builds/worker-5-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/malloc-man/ray-tracer 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" "+18a6d911caba59605eb03db1452848a85d2e5879" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded num_enum v0.5.6 [INFO] [stderr] Downloaded wayland-cursor v0.29.2 [INFO] [stderr] Downloaded wayland-sys v0.29.2 [INFO] [stderr] Downloaded num_enum_derive v0.5.6 [INFO] [stderr] Downloaded ab_glyph v0.2.13 [INFO] [stderr] Downloaded wayland-scanner v0.29.2 [INFO] [stderr] Downloaded wayland-client v0.29.2 [INFO] [stderr] Downloaded ttf-parser v0.14.0 [INFO] [stderr] Downloaded wayland-commons v0.29.2 [INFO] [stderr] Downloaded gif v0.11.3 [INFO] [stderr] Downloaded wayland-protocols v0.29.2 [INFO] [stderr] Downloaded weezl v0.1.5 [INFO] [stderr] Downloaded owned_ttf_parser v0.14.0 [INFO] [stderr] Downloaded wayland-egl v0.29.2 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+18a6d911caba59605eb03db1452848a85d2e5879" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 67d8cc94328a349c5359e58629fcd09d5397101cb6f4f407e44bab48080b34ad [INFO] running `Command { std: "docker" "start" "-a" "67d8cc94328a349c5359e58629fcd09d5397101cb6f4f407e44bab48080b34ad", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "67d8cc94328a349c5359e58629fcd09d5397101cb6f4f407e44bab48080b34ad", kill_on_drop: false }` [INFO] running `Command { std: "docker" 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"ghcr.io/rust-lang/crates-build-env/linux@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+18a6d911caba59605eb03db1452848a85d2e5879" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 0ba32e2484119f6f9e30dd8ecb31441506113c23b76e25676d4cd5541b4c9efb [INFO] running `Command { std: "docker" "start" "-a" "0ba32e2484119f6f9e30dd8ecb31441506113c23b76e25676d4cd5541b4c9efb", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.112 [INFO] [stderr] Compiling xml-rs v0.8.4 [INFO] [stderr] Compiling memoffset v0.6.5 [INFO] [stderr] Compiling log v0.4.14 [INFO] [stderr] Compiling pkg-config v0.3.24 [INFO] [stderr] Compiling proc-macro2 v1.0.36 [INFO] [stderr] Checking once_cell v1.9.0 [INFO] [stderr] Compiling memchr v2.4.1 [INFO] [stderr] Compiling khronos_api v3.1.0 [INFO] [stderr] Checking libloading v0.7.2 [INFO] [stderr] Compiling nom v7.1.0 [INFO] [stderr] Checking 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Checking miniz_oxide v0.3.7 [INFO] [stderr] Checking nix v0.22.0 [INFO] [stderr] Checking memmap2 v0.3.1 [INFO] [stderr] Checking owned_ttf_parser v0.14.0 [INFO] [stderr] Checking getrandom v0.2.3 [INFO] [stderr] Checking parking_lot_core v0.8.5 [INFO] [stderr] Checking ab_glyph v0.2.13 [INFO] [stderr] Checking mio v0.8.0 [INFO] [stderr] Compiling backtrace v0.3.63 [INFO] [stderr] Checking parking_lot v0.11.2 [INFO] [stderr] Checking num_cpus v1.13.1 [INFO] [stderr] Checking shared_library v0.1.9 [INFO] [stderr] Checking epaint v0.16.0 [INFO] [stderr] Checking osmesa-sys v0.1.2 [INFO] [stderr] Checking color_quant v1.1.0 [INFO] [stderr] Checking png v0.16.8 [INFO] [stderr] Checking bytemuck v1.7.3 [INFO] [stderr] Checking xcursor v0.3.4 [INFO] [stderr] Checking gif v0.11.3 [INFO] [stderr] Compiling wayland-client v0.29.2 [INFO] [stderr] Compiling wayland-protocols v0.29.2 [INFO] [stderr] Checking egui v0.16.1 [INFO] [stderr] Checking addr2line v0.17.0 [INFO] [stderr] Checking jpeg-decoder v0.1.22 [INFO] [stderr] Checking epi v0.16.0 [INFO] [stderr] Checking x11-clipboard v0.5.3 [INFO] [stderr] Checking tiff v0.6.1 [INFO] [stderr] Checking wayland-commons v0.29.2 [INFO] [stderr] Checking calloop v0.9.3 [INFO] [stderr] Checking image v0.23.14 [INFO] [stderr] Checking wayland-cursor v0.29.2 [INFO] [stderr] Checking wayland-egl v0.29.2 [INFO] [stderr] Checking smithay-clipboard v0.6.5 [INFO] [stderr] Checking copypasta v0.7.1 [INFO] [stderr] Checking glutin v0.28.0 [INFO] [stderr] Checking egui-winit v0.16.0 [INFO] [stderr] Checking egui_glium v0.16.0 [INFO] [stderr] Checking eframe v0.16.0 [INFO] [stderr] Checking ray-tracer v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/app.rs:66:13 [INFO] [stdout] | [INFO] [stdout] 66 | let mut preview = new.preview_camera.clone(); [INFO] [stdout] | ----^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `img` [INFO] [stdout] --> src/app.rs:184:30 [INFO] [stdout] | [INFO] [stdout] 184 | if let Some((img, tex)) = self.last_preview { [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_img` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `arc_object` [INFO] [stdout] --> src/app.rs:336:21 [INFO] [stdout] | [INFO] [stdout] 336 | if let Some(arc_object) = self.get_active_object() { [INFO] [stdout] | ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_arc_object` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `ui` [INFO] [stdout] --> src/app.rs:391:41 [INFO] [stdout] | [INFO] [stdout] 391 | ui.menu_button("Edit", |ui| { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_ui` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `ui` [INFO] [stdout] --> src/app.rs:394:41 [INFO] [stdout] | [INFO] [stdout] 394 | ui.menu_button("View", |ui| { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_ui` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/app.rs:445:33 [INFO] [stdout] | [INFO] [stdout] 445 | ... let mut world_objects = self.world.mut_objects(); [INFO] [stdout] | ----^^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `t_value`, `point`, and `inside` are never read [INFO] [stdout] --> src/scenes/world.rs:198:5 [INFO] [stdout] | [INFO] [stdout] 196 | struct Computations { [INFO] [stdout] | ------------ fields in this struct [INFO] [stdout] 197 | object: Object, [INFO] [stdout] 198 | t_value: f64, [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] 199 | point: Tuple, [INFO] [stdout] | ^^^^^ [INFO] [stdout] ... [INFO] [stdout] 202 | inside: bool, [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Computations` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `light` is never read [INFO] [stdout] --> src/scenes/lights.rs:7:5 [INFO] [stdout] | [INFO] [stdout] 4 | pub struct Light { [INFO] [stdout] | ----- field in this struct [INFO] [stdout] ... [INFO] [stdout] 7 | light: LightType [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Light` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `Option::::insert` that must be used [INFO] [stdout] --> src/app.rs:105:25 [INFO] [stdout] | [INFO] [stdout] 105 | img_lock.insert(image); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: if you intended to set a value, consider assignment instead [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 105 | let _ = img_lock.insert(image); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/app.rs:113:9 [INFO] [stdout] | [INFO] [stdout] 113 | self.world_sender.send(world); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 113 | let _ = self.world_sender.send(world); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/app.rs:200:9 [INFO] [stdout] | [INFO] [stdout] 200 | self.world_sender.send(wd); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 200 | let _ = self.world_sender.send(wd); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/app.rs:434:37 [INFO] [stdout] | [INFO] [stdout] 434 | ... group_lock.add_object_holder(object.clone()); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 434 | let _ = group_lock.add_object_holder(object.clone()); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/app.rs:456:33 [INFO] [stdout] | [INFO] [stdout] 456 | ... active_group.remove_from_group(remove); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 456 | let _ = active_group.remove_from_group(remove); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 13 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/scenes/world.rs:405:13 [INFO] [stdout] | [INFO] [stdout] 405 | let mut w = World::new_default(); [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/scenes/world.rs:457:13 [INFO] [stdout] | [INFO] [stdout] 457 | let mut w = World::new_default(); [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/scenes/world.rs:571:13 [INFO] [stdout] | [INFO] [stdout] 571 | let mut w = World::new_default(); [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/scenes/world.rs:619:13 [INFO] [stdout] | [INFO] [stdout] 619 | let mut w = World::new_default(); [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/app.rs:66:13 [INFO] [stdout] | [INFO] [stdout] 66 | let mut preview = new.preview_camera.clone(); [INFO] [stdout] | ----^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `img` [INFO] [stdout] --> src/app.rs:184:30 [INFO] [stdout] | [INFO] [stdout] 184 | if let Some((img, tex)) = self.last_preview { [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_img` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `arc_object` [INFO] [stdout] --> src/app.rs:336:21 [INFO] [stdout] | [INFO] [stdout] 336 | if let Some(arc_object) = self.get_active_object() { [INFO] [stdout] | ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_arc_object` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `ui` [INFO] [stdout] --> src/app.rs:391:41 [INFO] [stdout] | [INFO] [stdout] 391 | ui.menu_button("Edit", |ui| { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_ui` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `ui` [INFO] [stdout] --> src/app.rs:394:41 [INFO] [stdout] | [INFO] [stdout] 394 | ui.menu_button("View", |ui| { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_ui` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/app.rs:445:33 [INFO] [stdout] | [INFO] [stdout] 445 | ... let mut world_objects = self.world.mut_objects(); [INFO] [stdout] | ----^^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `t_value` is never read [INFO] [stdout] --> src/scenes/world.rs:198:5 [INFO] [stdout] | [INFO] [stdout] 196 | struct Computations { [INFO] [stdout] | ------------ field in this struct [INFO] [stdout] 197 | object: Object, [INFO] [stdout] 198 | t_value: f64, [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Computations` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `light` is never read [INFO] [stdout] --> src/scenes/lights.rs:7:5 [INFO] [stdout] | [INFO] [stdout] 4 | pub struct Light { [INFO] [stdout] | ----- field in this struct [INFO] [stdout] ... [INFO] [stdout] 7 | light: LightType [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Light` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/shapes/groups.rs:187:9 [INFO] [stdout] | [INFO] [stdout] 187 | g.add_object(s); [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 187 | let _ = g.add_object(s); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `Option::::insert` that must be used [INFO] [stdout] --> src/app.rs:105:25 [INFO] [stdout] | [INFO] [stdout] 105 | img_lock.insert(image); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: if you intended to set a value, consider assignment instead [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 105 | let _ = img_lock.insert(image); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/app.rs:113:9 [INFO] [stdout] | [INFO] [stdout] 113 | self.world_sender.send(world); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 113 | let _ = self.world_sender.send(world); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/app.rs:200:9 [INFO] [stdout] | [INFO] [stdout] 200 | self.world_sender.send(wd); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 200 | let _ = self.world_sender.send(wd); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/app.rs:434:37 [INFO] [stdout] | [INFO] [stdout] 434 | ... group_lock.add_object_holder(object.clone()); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 434 | let _ = group_lock.add_object_holder(object.clone()); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/app.rs:456:33 [INFO] [stdout] | [INFO] [stdout] 456 | ... active_group.remove_from_group(remove); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 456 | let _ = active_group.remove_from_group(remove); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 18 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 24.05s [INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: quick-xml v0.22.0 [INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2` [INFO] running `Command { std: "docker" "inspect" "0ba32e2484119f6f9e30dd8ecb31441506113c23b76e25676d4cd5541b4c9efb", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "0ba32e2484119f6f9e30dd8ecb31441506113c23b76e25676d4cd5541b4c9efb", kill_on_drop: false }` [INFO] [stdout] 0ba32e2484119f6f9e30dd8ecb31441506113c23b76e25676d4cd5541b4c9efb