[INFO] cloning repository https://github.com/taller-1-fiuba-rust/clases_practicas
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/taller-1-fiuba-rust/clases_practicas" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftaller-1-fiuba-rust%2Fclases_practicas", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftaller-1-fiuba-rust%2Fclases_practicas'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] aab27ea1f9459c24030c7b1f1d83210dadad5c18
[INFO] testing taller-1-fiuba-rust/clases_practicas against beta-2026-03-05 for beta-1.95-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftaller-1-fiuba-rust%2Fclases_practicas" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/taller-1-fiuba-rust/clases_practicas
[INFO] finished tweaking git repo https://github.com/taller-1-fiuba-rust/clases_practicas
[INFO] tweaked toml for git repo https://github.com/taller-1-fiuba-rust/clases_practicas written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/taller-1-fiuba-rust/clases_practicas on toolchain beta-2026-03-05
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-03-05" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/taller-1-fiuba-rust/clases_practicas 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" "+beta-2026-03-05" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr]   |
[INFO] [stderr]   = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr]   = note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr]   = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f11672b4bd4947eea5857af77a2244b90d0693d0779db4e2dbb5b8befd3eedd3
[INFO] running `Command { std: "docker" "start" "-a" "f11672b4bd4947eea5857af77a2244b90d0693d0779db4e2dbb5b8befd3eedd3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f11672b4bd4947eea5857af77a2244b90d0693d0779db4e2dbb5b8befd3eedd3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f11672b4bd4947eea5857af77a2244b90d0693d0779db4e2dbb5b8befd3eedd3", kill_on_drop: false }`
[INFO] [stdout] f11672b4bd4947eea5857af77a2244b90d0693d0779db4e2dbb5b8befd3eedd3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2e64a547fc7d036f1b7136bdbf585fe4d64496015faff57c798c1d0d7368c1a2
[INFO] running `Command { std: "docker" "start" "-a" "2e64a547fc7d036f1b7136bdbf585fe4d64496015faff57c798c1d0d7368c1a2", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr]   |
[INFO] [stderr]   = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr]   = note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr]   = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr] warning: output filename collision at /opt/rustwide/target/debug/rc
[INFO] [stderr]   |
[INFO] [stderr]   = note: the bin target `rc` in package `clase3 v0.1.0 (/opt/rustwide/workdir/clases/clase3)` has the same output filename as the bin target `rc` in package `clase2 v0.1.0 (/opt/rustwide/workdir/clases/clase2)`
[INFO] [stderr]   = note: this may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>
[INFO] [stderr]   = help: consider changing their names to be unique or compiling them separately
[INFO] [stderr] warning: output filename collision at /opt/rustwide/target/debug/rc.dwp
[INFO] [stderr]   |
[INFO] [stderr]   = note: the bin target `rc` in package `clase3 v0.1.0 (/opt/rustwide/workdir/clases/clase3)` has the same output filename as the bin target `rc` in package `clase2 v0.1.0 (/opt/rustwide/workdir/clases/clase2)`
[INFO] [stderr]   = note: this may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>
[INFO] [stderr]   = help: consider changing their names to be unique or compiling them separately
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[INFO] [stderr]    Compiling libc v0.2.159
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[INFO] [stderr]    Compiling wayland-cursor v0.29.5
[INFO] [stderr]    Compiling thiserror-impl v1.0.40
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[INFO] [stderr]    Compiling bytemuck_derive v1.7.1
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]    Compiling thiserror v1.0.40
[INFO] [stderr]    Compiling enumflags2_derive v0.7.10
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[INFO] [stderr]    Compiling bytemuck v1.18.0
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[INFO] [stderr]    Compiling regex-automata v0.3.7
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[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling crypto-common v0.1.6
[INFO] [stderr]    Compiling memmap2 v0.5.10
[INFO] [stderr]    Compiling async-channel v1.9.0
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[INFO] [stderr]    Compiling tracing v0.1.40
[INFO] [stderr]    Compiling arrayref v0.3.9
[INFO] [stderr]    Compiling strict-num v0.1.1
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[INFO] [stderr]    Compiling semver v1.0.17
[INFO] [stderr]    Compiling blocking v1.4.1
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[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling parking_lot_core v0.9.10
[INFO] [stderr]    Compiling futures-executor v0.3.28
[INFO] [stderr]    Compiling futures-lite v2.3.0
[INFO] [stderr]    Compiling socket2 v0.4.10
[INFO] [stderr]    Compiling regex v1.9.4
[INFO] [stderr]    Compiling ahash v0.8.6
[INFO] [stderr]    Compiling cpufeatures v0.2.14
[INFO] [stderr]    Compiling arrayvec v0.7.6
[INFO] [stderr]    Compiling accesskit v0.11.2
[INFO] [stderr]    Compiling gio v0.17.9
[INFO] [stderr]    Compiling tinyvec v1.8.0
[INFO] [stderr]    Compiling async-executor v1.13.1
[INFO] [stderr]    Compiling tiny-skia v0.8.4
[INFO] [stderr]    Compiling sha1 v0.10.6
[INFO] [stderr]    Compiling parking_lot v0.12.3
[INFO] [stderr]    Compiling nix v0.26.4
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling async-recursion v1.1.1
[INFO] [stderr]    Compiling serde_repr v0.1.19
[INFO] [stderr]    Compiling serde_spanned v0.6.1
[INFO] [stderr]    Compiling toml_datetime v0.6.1
[INFO] [stderr]    Compiling enumflags2 v0.7.10
[INFO] [stderr]    Compiling async-trait v0.1.83
[INFO] [stderr]    Compiling toml_edit v0.19.8
[INFO] [stderr]    Compiling winit v0.28.7
[INFO] [stderr]    Compiling xdg-home v1.3.0
[INFO] [stderr]    Compiling async-broadcast v0.5.1
[INFO] [stderr]    Compiling ordered-stream v0.2.0
[INFO] [stderr]    Compiling rustix v0.38.37
[INFO] [stderr]    Compiling raw-window-handle v0.5.2
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]    Compiling unicode-normalization v0.1.24
[INFO] [stderr]    Compiling ecolor v0.22.0
[INFO] [stderr]    Compiling emath v0.22.0
[INFO] [stderr]    Compiling atspi-macros v0.2.0
[INFO] [stderr]    Compiling glutin_egl_sys v0.5.1
[INFO] [stderr]    Compiling glutin_glx_sys v0.4.0
[INFO] [stderr]    Compiling mio v0.8.11
[INFO] [stderr]    Compiling wayland-sys v0.30.1
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[INFO] [stderr]    Compiling memoffset v0.8.0
[INFO] [stderr]    Compiling bitflags v2.6.0
[INFO] [stderr]    Compiling linux-raw-sys v0.4.14
[INFO] [stderr]    Compiling nohash-hasher v0.2.0
[INFO] [stderr]    Compiling idna v0.5.0
[INFO] [stderr]    Compiling epaint v0.22.0
[INFO] [stderr]    Compiling field-offset v0.3.5
[INFO] [stderr]    Compiling accesskit_consumer v0.15.2
[INFO] [stderr]    Compiling glutin v0.30.10
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling x11rb-protocol v0.13.1
[INFO] [stderr]    Compiling toml v0.7.3
[INFO] [stderr]    Compiling proc-macro-crate v1.3.1
[INFO] [stderr]    Compiling system-deps v6.0.5
[INFO] [stderr]    Compiling egui v0.22.0
[INFO] [stderr]    Compiling url v2.5.2
[INFO] [stderr]    Compiling glib-sys v0.17.4
[INFO] [stderr]    Compiling gobject-sys v0.17.4
[INFO] [stderr]    Compiling gio-sys v0.17.4
[INFO] [stderr]    Compiling glib-macros v0.17.9
[INFO] [stderr]    Compiling cairo-sys-rs v0.17.0
[INFO] [stderr]    Compiling zvariant_derive v3.15.2
[INFO] [stderr]    Compiling pango-sys v0.17.0
[INFO] [stderr]    Compiling gdk-sys v0.17.0
[INFO] [stderr]    Compiling atk-sys v0.17.0
[INFO] [stderr]    Compiling gdk-pixbuf-sys v0.17.0
[INFO] [stderr]    Compiling zvariant v3.15.2
[INFO] [stderr]    Compiling zbus_macros v3.15.2
[INFO] [stderr]    Compiling gtk-sys v0.17.0
[INFO] [stderr]    Compiling zbus_names v2.6.1
[INFO] [stderr]    Compiling glib v0.17.9
[INFO] [stderr]    Compiling x11rb v0.13.1
[INFO] [stderr]    Compiling glutin-winit v0.3.0
[INFO] [stderr]    Compiling gtk v0.17.1
[INFO] [stderr]    Compiling home v0.5.9
[INFO] [stderr]    Compiling webbrowser v0.8.15
[INFO] [stderr]    Compiling arboard v3.4.1
[INFO] [stderr]    Compiling zbus v3.15.2
[INFO] [stderr]    Compiling gtk3-macros v0.17.1
[INFO] [stderr]    Compiling glow v0.12.3
[INFO] [stderr]    Compiling num_cpus v1.16.0
[INFO] [stderr]    Compiling clase1 v0.1.0 (/opt/rustwide/workdir/clases/clase1)
[INFO] [stdout] warning: unused import: `crate::saludar::saludar_nombre`
[INFO] [stdout]  --> clases/clase1/src/iteraciones.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::saludar::saludar_nombre;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> clases/clase1/src/builder_helados.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 26 | impl Helado {
[INFO] [stdout]    | ----------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 33 |     pub fn new(recipiente: Recipiente, gustos: Vec<Gusto>, cucharita: bool) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `HeladoBuilder` is never constructed
[INFO] [stdout]   --> clases/clase1/src/builder_helados.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | struct HeladoBuilder {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `build`, `with_recipiente`, `with_cucharita`, and `add_gusto` are never used
[INFO] [stdout]   --> clases/clase1/src/builder_helados.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 50 | impl HeladoBuilder {
[INFO] [stdout]    | ------------------ associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 53 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |     pub fn build(self) -> Helado {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 73 |     pub fn with_recipiente(mut self, recipiente: Recipiente) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 78 |     pub fn with_cucharita(mut self, cucharita: bool) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 83 |     pub fn add_gusto(mut self, gusto: Gusto) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Coord` is never constructed
[INFO] [stdout]  --> clases/clase1/src/coordenada.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Coord {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `modulo` are never used
[INFO] [stdout]   --> clases/clase1/src/coordenada.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl Coord {
[INFO] [stdout]    | ---------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 12 |     pub fn new(x: i32, y: i32) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 20 |     pub fn modulo(&self) -> f32 {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Carrera` is never used
[INFO] [stdout]  --> clases/clase1/src/correlativas.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub enum Carrera {
[INFO] [stdout]   |          ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_correlativas` is never used
[INFO] [stdout]   --> clases/clase1/src/correlativas.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub fn print_correlativas(carrera: &Carrera) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `saludar` is never used
[INFO] [stdout]  --> clases/clase1/src/saludar.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn saludar() {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling image v0.24.9
[INFO] [stderr]    Compiling clase3 v0.1.0 (/opt/rustwide/workdir/clases/clase3)
[INFO] [stderr]    Compiling clase2 v0.1.0 (/opt/rustwide/workdir/clases/clase2)
[INFO] [stdout] warning: unused variable: `nombre_contador_ref`
[INFO] [stdout]    --> clases/clase2/src/scopes.rs:105:9
[INFO] [stdout]     |
[INFO] [stdout] 105 |     let nombre_contador_ref = &contador_mut.clave;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_nombre_contador_ref`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m`
[INFO] [stdout]    --> clases/clase2/src/scopes.rs:107:9
[INFO] [stdout]     |
[INFO] [stdout] 107 |     let m = contador_mut.valor + 3;
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `borrow_vector` is never used
[INFO] [stdout]   --> clases/clase2/src/scopes.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn borrow_vector() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `borrow_vector_mut` is never used
[INFO] [stdout]   --> clases/clase2/src/scopes.rs:53:4
[INFO] [stdout]    |
[INFO] [stdout] 53 | fn borrow_vector_mut() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling egui_glow v0.22.0
[INFO] [stderr]    Compiling clase4 v0.1.0 (/opt/rustwide/workdir/clases/clase4)
[INFO] [stdout] warning: unused import: `TcpStream`
[INFO] [stdout]  --> clases/clase4/src/01_bin_protocol_srv.rs:7:29
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::net::{TcpListener, TcpStream};
[INFO] [stdout]   |                             ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `nombre` and `padron` are never read
[INFO] [stdout]  --> clases/clase4/src/alumno.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Alumno {
[INFO] [stdout]   |            ------ fields in this struct
[INFO] [stdout] 5 |     pub nombre: String,
[INFO] [stdout]   |         ^^^^^^
[INFO] [stdout] 6 |     pub padron: u32
[INFO] [stdout]   |         ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Alumno` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `write_to` is never used
[INFO] [stdout]   --> clases/clase4/src/alumno.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl Alumno {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] 10 |     pub fn write_to(&self, stream: &mut dyn Write) -> std::io::Result<()> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling clase-testing v0.1.0 (/opt/rustwide/workdir/clases/clase6)
[INFO] [stdout] warning: unused import: `core::num`
[INFO] [stdout]  --> clases/clase4/src/02_open_ports.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use core::num;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TcpStream`
[INFO] [stdout]  --> clases/clase4/src/00_server.rs:6:29
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::net::{TcpListener, TcpStream};
[INFO] [stdout]   |                             ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `padron` is never read
[INFO] [stdout]  --> clases/clase2/src/closure_borrow.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Alumno {
[INFO] [stdout]   |        ------ field in this struct
[INFO] [stdout] 4 |     padron: u32,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Alumno` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `nombre` and `docente` are never read
[INFO] [stdout]  --> clases/clase2/src/lifetime.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Curso<'a> {
[INFO] [stdout]   |        ----- fields in this struct
[INFO] [stdout] 7 |     nombre: String,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 8 |     docente: &'a Docente,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Curso` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `legajo`, `nombre`, and `regular` are never read
[INFO] [stdout]   --> clases/clase2/src/lifetime.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct Docente {
[INFO] [stdout]    |        ------- fields in this struct
[INFO] [stdout] 13 |     legajo: u32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 14 |     nombre: String,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 15 |     regular: bool,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Docente` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling cairo-rs v0.17.0
[INFO] [stderr]    Compiling atk v0.17.1
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> clases/clase2/src/poly.rs:88:23
[INFO] [stdout]    |
[INFO] [stdout] 88 | fn presentar(animal: &(dyn PuedeHablar)) {
[INFO] [stdout]    |                       ^               ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 88 - fn presentar(animal: &(dyn PuedeHablar)) {
[INFO] [stdout] 88 + fn presentar(animal: &dyn PuedeHablar) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vector_de_vacas`
[INFO] [stdout]   --> clases/clase2/src/poly.rs:72:9
[INFO] [stdout]    |
[INFO] [stdout] 72 |     let vector_de_vacas = vec![
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_vector_de_vacas`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `imprimir` is never used
[INFO] [stdout]  --> clases/clase2/src/poly.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn imprimir<T>(algo: T) where T: std::fmt::Debug + Clone {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hacer_hablar` is never used
[INFO] [stdout]   --> clases/clase2/src/poly.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn hacer_hablar<T: PuedeHablar>(animales: Vec<T>) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hacer_hablar_dinamico` is never used
[INFO] [stdout]   --> clases/clase2/src/poly.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn hacer_hablar_dinamico(animales: Vec<Box<dyn PuedeHablar>>) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `padron` is never read
[INFO] [stdout]   --> clases/clase2/src/boxes.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | struct Alumno {
[INFO] [stdout]    |        ------ field in this struct
[INFO] [stdout] 10 |     padron: u32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Alumno` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `legajo` and `regular` are never read
[INFO] [stdout]   --> clases/clase2/src/boxes.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | struct Docente {
[INFO] [stdout]    |        ------- fields in this struct
[INFO] [stdout] 16 |     legajo: u32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 17 |     nombre: String,
[INFO] [stdout] 18 |     regular: bool,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Docente` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `read_from` is never used
[INFO] [stdout]   --> clases/clase4/src/alumno.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl Alumno {
[INFO] [stdout]    | ----------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 22 |     pub fn read_from(stream: &mut dyn Read) -> std::io::Result<Alumno> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling atspi v0.10.1
[INFO] [stderr]    Compiling pango v0.17.4
[INFO] [stderr]    Compiling gdk-pixbuf v0.17.0
[INFO] [stderr]    Compiling gdk v0.17.1
[INFO] [stderr]    Compiling accesskit_unix v0.5.2
[INFO] [stderr]    Compiling sctk-adwaita v0.5.4
[INFO] [stderr]    Compiling smithay-clipboard v0.6.6
[INFO] [stderr]    Compiling accesskit_winit v0.14.4
[INFO] [stderr]    Compiling egui-winit v0.22.0
[INFO] [stderr]    Compiling eframe v0.22.0
[INFO] [stderr]    Compiling clase_egui v0.1.0 (/opt/rustwide/workdir/clases/clase_egui)
[INFO] [stderr] error: could not compile `gtk` (lib)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/beta-2026-03-05-x86_64-unknown-linux-gnu/bin/rustc --crate-name gtk --edition=2021 /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/gtk-0.17.1/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("dox", "gio_v2_58", "unsafe-assume-initialized", "v3_24", "v3_24_1", "v3_24_11", "v3_24_30", "v3_24_8", "v3_24_9"))' -C metadata=6964bfe31a1b4e0f -C extra-filename=-7a3a64711633ff10 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern atk=/opt/rustwide/target/debug/deps/libatk-8c453393baa1cc88.rmeta --extern bitflags=/opt/rustwide/target/debug/deps/libbitflags-dde12b0d7d495b50.rmeta --extern cairo=/opt/rustwide/target/debug/deps/libcairo-6ecdd4c9a0ac6ee0.rmeta --extern field_offset=/opt/rustwide/target/debug/deps/libfield_offset-cbcceb231cfc2ede.rmeta --extern futures_channel=/opt/rustwide/target/debug/deps/libfutures_channel-57ffbe26c3277559.rmeta --extern gdk=/opt/rustwide/target/debug/deps/libgdk-520deebdec1b48c2.rmeta --extern gdk_pixbuf=/opt/rustwide/target/debug/deps/libgdk_pixbuf-a47f58f572e3c962.rmeta --extern gio=/opt/rustwide/target/debug/deps/libgio-c719ace470fcb350.rmeta --extern glib=/opt/rustwide/target/debug/deps/libglib-f5cf01ffa7319a93.rmeta --extern ffi=/opt/rustwide/target/debug/deps/libgtk_sys-f32894c40dac35de.rmeta --extern gtk3_macros=/opt/rustwide/target/debug/deps/libgtk3_macros-c320047d4e9e19eb.so --extern libc=/opt/rustwide/target/debug/deps/liblibc-7ce81163adfc0ba8.rmeta --extern once_cell=/opt/rustwide/target/debug/deps/libonce_cell-a4c8c5e96d5ca39e.rmeta --extern pango=/opt/rustwide/target/debug/deps/libpango-666ad8e0dca845b5.rmeta --cap-lints allow --cap-lints=warn --cfg 'gdk_backend="broadway"' --cfg 'gdk_backend="wayland"' --cfg 'gdk_backend="x11"'` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "2e64a547fc7d036f1b7136bdbf585fe4d64496015faff57c798c1d0d7368c1a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e64a547fc7d036f1b7136bdbf585fe4d64496015faff57c798c1d0d7368c1a2", kill_on_drop: false }`
[INFO] [stdout] 2e64a547fc7d036f1b7136bdbf585fe4d64496015faff57c798c1d0d7368c1a2
