[INFO] cloning repository https://github.com/takumi3488/img2epub
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/takumi3488/img2epub" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftakumi3488%2Fimg2epub", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftakumi3488%2Fimg2epub'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c62454d611970f8d94f895e03eaa5fc8e1109679
[INFO] checking takumi3488/img2epub against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftakumi3488%2Fimg2epub" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/takumi3488/img2epub on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/takumi3488/img2epub
[INFO] finished tweaking git repo https://github.com/takumi3488/img2epub
[INFO] tweaked toml for git repo https://github.com/takumi3488/img2epub written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/takumi3488/img2epub 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 725cc18a728978c5964f0cb2b3ffb4ee99a5c9d2cf5ea4541c9a263ecb6b5093
[INFO] running `Command { std: "docker" "start" "-a" "725cc18a728978c5964f0cb2b3ffb4ee99a5c9d2cf5ea4541c9a263ecb6b5093", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "725cc18a728978c5964f0cb2b3ffb4ee99a5c9d2cf5ea4541c9a263ecb6b5093", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "725cc18a728978c5964f0cb2b3ffb4ee99a5c9d2cf5ea4541c9a263ecb6b5093", kill_on_drop: false }`
[INFO] [stdout] 725cc18a728978c5964f0cb2b3ffb4ee99a5c9d2cf5ea4541c9a263ecb6b5093
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 80650b29a2b246d7ef861367d37b7a9dbbb90b3e40b1e6d034cfb3cf8510ad51
[INFO] running `Command { std: "docker" "start" "-a" "80650b29a2b246d7ef861367d37b7a9dbbb90b3e40b1e6d034cfb3cf8510ad51", kill_on_drop: false }`
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[INFO] [stderr]     Checking smallvec v1.11.2
[INFO] [stderr]     Checking rand_chacha v0.3.1
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[INFO] [stderr]    Compiling thiserror-impl v1.0.56
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[INFO] [stderr]    Compiling num-derive v0.4.2
[INFO] [stderr]    Compiling arg_enum_proc_macro v0.3.4
[INFO] [stderr]    Compiling serde_derive v1.0.197
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[INFO] [stderr]     Checking profiling v1.0.15
[INFO] [stderr]     Checking image-webp v0.1.1
[INFO] [stderr]     Checking epub v2.1.1
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[INFO] [stderr]     Checking ravif v0.11.5
[INFO] [stderr]     Checking image v0.25.0
[INFO] [stderr]     Checking img2epub v0.1.9 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Result` is imported redundantly
[INFO] [stdout]  --> src/epub/epub.rs:3:81
[INFO] [stdout]   |
[INFO] [stdout] 3 |     env, fs::{create_dir, remove_dir_all, write}, path::Path, process::Command, result::Result
[INFO] [stdout]   |                                                                                 ^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Result` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Result` is imported redundantly
[INFO] [stdout]  --> src/epub/epub.rs:3:81
[INFO] [stdout]   |
[INFO] [stdout] 3 |     env, fs::{create_dir, remove_dir_all, write}, path::Path, process::Command, result::Result
[INFO] [stdout]   |                                                                                 ^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Result` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `ext` and `id` are never read
[INFO] [stdout]   --> src/epub/images.rs:9:9
[INFO] [stdout]    |
[INFO] [stdout] 6  | pub struct Image {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 9  |     pub ext: String,
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 10 |     pub id: String,
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Image` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `ext` and `id` are never read
[INFO] [stdout]   --> src/epub/images.rs:9:9
[INFO] [stdout]    |
[INFO] [stdout] 6  | pub struct Image {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 9  |     pub ext: String,
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 10 |     pub id: String,
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Image` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.82s
[INFO] running `Command { std: "docker" "inspect" "80650b29a2b246d7ef861367d37b7a9dbbb90b3e40b1e6d034cfb3cf8510ad51", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80650b29a2b246d7ef861367d37b7a9dbbb90b3e40b1e6d034cfb3cf8510ad51", kill_on_drop: false }`
[INFO] [stdout] 80650b29a2b246d7ef861367d37b7a9dbbb90b3e40b1e6d034cfb3cf8510ad51