[INFO] cloning repository https://github.com/Nandem/Rust_learning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Nandem/Rust_learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNandem%2FRust_learning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNandem%2FRust_learning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f6ba2518afb7cacb51835855bbd260bf98a628b1
[INFO] documenting Nandem/Rust_learning against 1.75.0 for beta-1.76-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNandem%2FRust_learning" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Nandem/Rust_learning on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Nandem/Rust_learning
[INFO] finished tweaking git repo https://github.com/Nandem/Rust_learning
[INFO] tweaked toml for git repo https://github.com/Nandem/Rust_learning written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Nandem/Rust_learning 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" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8808574e627f5d481850426ad8879005a181a3c205b08ba7876c78556f3684d9
[INFO] running `Command { std: "docker" "start" "-a" "8808574e627f5d481850426ad8879005a181a3c205b08ba7876c78556f3684d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8808574e627f5d481850426ad8879005a181a3c205b08ba7876c78556f3684d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8808574e627f5d481850426ad8879005a181a3c205b08ba7876c78556f3684d9", kill_on_drop: false }`
[INFO] [stdout] 8808574e627f5d481850426ad8879005a181a3c205b08ba7876c78556f3684d9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c5725231da4c166331007cf8fdb989502139c9c88ebdaaa9f2449a9b9fe377cb
[INFO] running `Command { std: "docker" "start" "-a" "c5725231da4c166331007cf8fdb989502139c9c88ebdaaa9f2449a9b9fe377cb", kill_on_drop: false }`
[INFO] [stderr]  Documenting learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `io`
[INFO] [stdout]   --> src/errors/error1.rs:39:49
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn read_username_from_file1() -> Result<String, io::Error> {
[INFO] [stdout]    |                                                 ^^ use of undeclared crate or module `io`
[INFO] [stdout]    |
[INFO] [stdout] help: a builtin type with a similar name exists
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn read_username_from_file1() -> Result<String, i8::Error> {
[INFO] [stdout]    |                                                 ~~
[INFO] [stdout] help: consider importing this module
[INFO] [stdout]    |
[INFO] [stdout] 12 + use std::io;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `io`
[INFO] [stdout]   --> src/errors/error1.rs:55:49
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn read_username_from_file2() -> Result<String, io::Error> {
[INFO] [stdout]    |                                                 ^^ use of undeclared crate or module `io`
[INFO] [stdout]    |
[INFO] [stdout] help: a builtin type with a similar name exists
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn read_username_from_file2() -> Result<String, i8::Error> {
[INFO] [stdout]    |                                                 ~~
[INFO] [stdout] help: consider importing this module
[INFO] [stdout]    |
[INFO] [stdout] 12 + use std::io;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `io`
[INFO] [stdout]   --> src/errors/error1.rs:62:49
[INFO] [stdout]    |
[INFO] [stdout] 62 | fn read_username_from_file3() -> Result<String, io::Error> {
[INFO] [stdout]    |                                                 ^^ use of undeclared crate or module `io`
[INFO] [stdout]    |
[INFO] [stdout] help: a builtin type with a similar name exists
[INFO] [stdout]    |
[INFO] [stdout] 62 | fn read_username_from_file3() -> Result<String, i8::Error> {
[INFO] [stdout]    |                                                 ~~
[INFO] [stdout] help: consider importing this module
[INFO] [stdout]    |
[INFO] [stdout] 12 + use std::io;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `learning`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.75.0-x86_64-unknown-linux-gnu/bin/rustdoc --crate-type lib --crate-name learning src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=557a2ab8957117cb -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "c5725231da4c166331007cf8fdb989502139c9c88ebdaaa9f2449a9b9fe377cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c5725231da4c166331007cf8fdb989502139c9c88ebdaaa9f2449a9b9fe377cb", kill_on_drop: false }`
[INFO] [stdout] c5725231da4c166331007cf8fdb989502139c9c88ebdaaa9f2449a9b9fe377cb
[INFO] documenting Nandem/Rust_learning against beta-2023-12-22 for beta-1.76-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNandem%2FRust_learning" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Nandem/Rust_learning on toolchain beta-2023-12-22
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Nandem/Rust_learning
[INFO] finished tweaking git repo https://github.com/Nandem/Rust_learning
[INFO] tweaked toml for git repo https://github.com/Nandem/Rust_learning written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/Nandem/Rust_learning 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-2023-12-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-12-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8ea9ed88344601d508bef9253022729f9d8015602c7633e1eda6194660a64ea2
[INFO] running `Command { std: "docker" "start" "-a" "8ea9ed88344601d508bef9253022729f9d8015602c7633e1eda6194660a64ea2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8ea9ed88344601d508bef9253022729f9d8015602c7633e1eda6194660a64ea2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ea9ed88344601d508bef9253022729f9d8015602c7633e1eda6194660a64ea2", kill_on_drop: false }`
[INFO] [stdout] 8ea9ed88344601d508bef9253022729f9d8015602c7633e1eda6194660a64ea2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-12-22" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7755505ae2c54acea452065e23b890445e9d58cf0ac028ba988fbd9c5c0df30e
[INFO] running `Command { std: "docker" "start" "-a" "7755505ae2c54acea452065e23b890445e9d58cf0ac028ba988fbd9c5c0df30e", kill_on_drop: false }`
[INFO] [stderr]  Documenting learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `io`
[INFO] [stdout]   --> src/errors/error1.rs:39:49
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn read_username_from_file1() -> Result<String, io::Error> {
[INFO] [stdout]    |                                                 ^^ use of undeclared crate or module `io`
[INFO] [stdout]    |
[INFO] [stdout] help: a builtin type with a similar name exists
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn read_username_from_file1() -> Result<String, i8::Error> {
[INFO] [stdout]    |                                                 ~~
[INFO] [stdout] help: consider importing this module
[INFO] [stdout]    |
[INFO] [stdout] 12 + use std::io;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `io`
[INFO] [stdout]   --> src/errors/error1.rs:55:49
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn read_username_from_file2() -> Result<String, io::Error> {
[INFO] [stdout]    |                                                 ^^ use of undeclared crate or module `io`
[INFO] [stdout]    |
[INFO] [stdout] help: a builtin type with a similar name exists
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn read_username_from_file2() -> Result<String, i8::Error> {
[INFO] [stdout]    |                                                 ~~
[INFO] [stdout] help: consider importing this module
[INFO] [stdout]    |
[INFO] [stdout] 12 + use std::io;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `io`
[INFO] [stdout]   --> src/errors/error1.rs:62:49
[INFO] [stdout]    |
[INFO] [stdout] 62 | fn read_username_from_file3() -> Result<String, io::Error> {
[INFO] [stdout]    |                                                 ^^ use of undeclared crate or module `io`
[INFO] [stdout]    |
[INFO] [stdout] help: a builtin type with a similar name exists
[INFO] [stdout]    |
[INFO] [stdout] 62 | fn read_username_from_file3() -> Result<String, i8::Error> {
[INFO] [stdout]    |                                                 ~~
[INFO] [stdout] help: consider importing this module
[INFO] [stdout]    |
[INFO] [stdout] 12 + use std::io;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `learning`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/beta-2023-12-22-x86_64-unknown-linux-gnu/bin/rustdoc --crate-type lib --crate-name learning src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=55aedaa8516e707b -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "7755505ae2c54acea452065e23b890445e9d58cf0ac028ba988fbd9c5c0df30e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7755505ae2c54acea452065e23b890445e9d58cf0ac028ba988fbd9c5c0df30e", kill_on_drop: false }`
[INFO] [stdout] 7755505ae2c54acea452065e23b890445e9d58cf0ac028ba988fbd9c5c0df30e
