[INFO] cloning repository https://github.com/TimTom2016/alphabet_recognizer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/TimTom2016/alphabet_recognizer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTimTom2016%2Falphabet_recognizer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTimTom2016%2Falphabet_recognizer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e3b7d30386a9dcee15adf0f499410981987e44ae
[INFO] checking TimTom2016/alphabet_recognizer against master#0e517d38ad0e72f93c734b14fabd4bb9b7441de6 for pr-140557-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTimTom2016%2Falphabet_recognizer" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/TimTom2016/alphabet_recognizer on toolchain 0e517d38ad0e72f93c734b14fabd4bb9b7441de6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0e517d38ad0e72f93c734b14fabd4bb9b7441de6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/TimTom2016/alphabet_recognizer
[INFO] finished tweaking git repo https://github.com/TimTom2016/alphabet_recognizer
[INFO] tweaked toml for git repo https://github.com/TimTom2016/alphabet_recognizer written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/TimTom2016/alphabet_recognizer 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" "+0e517d38ad0e72f93c734b14fabd4bb9b7441de6" "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 2024 which implies `resolver = "3"`
[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 2024 resolver, specify `workspace.resolver = "3"` 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: /workspace/builds/worker-4-tc1/source/web/Cargo.toml: `default-features` is ignored for burn, since `default-features` was not specified for `workspace.dependencies.burn`, this could become a hard error in the future
[INFO] [stderr]     Blocking waiting for file lock on package cache
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[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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+0e517d38ad0e72f93c734b14fabd4bb9b7441de6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5b7f0d3880d6a7d6ef5e2bcaebc828668421907ed54d0e182dda25407b2e4c5f
[INFO] running `Command { std: "docker" "start" "-a" "5b7f0d3880d6a7d6ef5e2bcaebc828668421907ed54d0e182dda25407b2e4c5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5b7f0d3880d6a7d6ef5e2bcaebc828668421907ed54d0e182dda25407b2e4c5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b7f0d3880d6a7d6ef5e2bcaebc828668421907ed54d0e182dda25407b2e4c5f", kill_on_drop: false }`
[INFO] [stdout] 5b7f0d3880d6a7d6ef5e2bcaebc828668421907ed54d0e182dda25407b2e4c5f
[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" "-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+0e517d38ad0e72f93c734b14fabd4bb9b7441de6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 88fc079a099461d506ac99356dabaee34e14c70d8542f08f4499b118ab6dd614
[INFO] running `Command { std: "docker" "start" "-a" "88fc079a099461d506ac99356dabaee34e14c70d8542f08f4499b118ab6dd614", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2024 which implies `resolver = "3"`
[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 2024 resolver, specify `workspace.resolver = "3"` 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: /opt/rustwide/workdir/web/Cargo.toml: `default-features` is ignored for burn, since `default-features` was not specified for `workspace.dependencies.burn`, this could become a hard error in the future
[INFO] [stderr]    Compiling unicode-ident v1.0.18
[INFO] [stderr]    Compiling proc-macro2 v1.0.94
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[INFO] [stderr]    Compiling autocfg v1.4.0
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[INFO] [stderr]     Checking once_cell v1.21.3
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[INFO] [stderr]     Checking smallvec v1.15.0
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[INFO] [stderr]    Compiling num-traits v0.2.19
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[INFO] [stderr]     Checking tracing v0.1.41
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[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]   --> train/src/train.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | use std::collections::HashMap;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]   --> train/src/train.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | use std::collections::HashMap;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `ARTIFACT_DIR` is never used
[INFO] [stdout]   --> train/src/train.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | static ARTIFACT_DIR: &str = "/tmp/alphabet_recognizer";
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> train/src/train.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl CustomDataset {
[INFO] [stdout]    | ------------------ associated function in this implementation
[INFO] [stdout] 28 |     pub fn new(items: Vec<FileItem>) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `create_artifact_dir` is never used
[INFO] [stdout]   --> train/src/train.rs:60:4
[INFO] [stdout]    |
[INFO] [stdout] 60 | fn create_artifact_dir(artifact_dir: &str) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> train/src/train.rs:65:8
[INFO] [stdout]    |
[INFO] [stdout] 65 | pub fn run<B: AutodiffBackend>(device: B::Device) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `ARTIFACT_DIR` is never used
[INFO] [stdout]   --> train/src/train.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | static ARTIFACT_DIR: &str = "/tmp/alphabet_recognizer";
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> train/src/train.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl CustomDataset {
[INFO] [stdout]    | ------------------ associated function in this implementation
[INFO] [stdout] 28 |     pub fn new(items: Vec<FileItem>) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `create_artifact_dir` is never used
[INFO] [stdout]   --> train/src/train.rs:60:4
[INFO] [stdout]    |
[INFO] [stdout] 60 | fn create_artifact_dir(artifact_dir: &str) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> train/src/train.rs:65:8
[INFO] [stdout]    |
[INFO] [stdout] 65 | pub fn run<B: AutodiffBackend>(device: B::Device) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3m 24s
[INFO] running `Command { std: "docker" "inspect" "88fc079a099461d506ac99356dabaee34e14c70d8542f08f4499b118ab6dd614", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "88fc079a099461d506ac99356dabaee34e14c70d8542f08f4499b118ab6dd614", kill_on_drop: false }`
[INFO] [stdout] 88fc079a099461d506ac99356dabaee34e14c70d8542f08f4499b118ab6dd614