[INFO] cloning repository https://github.com/ttpss930141011/Learning-Rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ttpss930141011/Learning-Rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fttpss930141011%2FLearning-Rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fttpss930141011%2FLearning-Rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 468247cd2aea9802daa7126acd0bb5dbb1cccecb
[INFO] checking ttpss930141011/Learning-Rust against try#7df376b035b3d12ff0386ad8b45b76dbe020257b for pr-142712
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fttpss930141011%2FLearning-Rust" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ttpss930141011/Learning-Rust
[INFO] finished tweaking git repo https://github.com/ttpss930141011/Learning-Rust
[INFO] tweaked toml for git repo https://github.com/ttpss930141011/Learning-Rust written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ttpss930141011/Learning-Rust on toolchain 7df376b035b3d12ff0386ad8b45b76dbe020257b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7df376b035b3d12ff0386ad8b45b76dbe020257b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ttpss930141011/Learning-Rust 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" "+7df376b035b3d12ff0386ad8b45b76dbe020257b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+7df376b035b3d12ff0386ad8b45b76dbe020257b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0ab17943e1c5b75b2e56d6e26b17d38b7562b30526022038ceae327bb85e6fb2
[INFO] running `Command { std: "docker" "start" "-a" "0ab17943e1c5b75b2e56d6e26b17d38b7562b30526022038ceae327bb85e6fb2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0ab17943e1c5b75b2e56d6e26b17d38b7562b30526022038ceae327bb85e6fb2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ab17943e1c5b75b2e56d6e26b17d38b7562b30526022038ceae327bb85e6fb2", kill_on_drop: false }`
[INFO] [stdout] 0ab17943e1c5b75b2e56d6e26b17d38b7562b30526022038ceae327bb85e6fb2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+7df376b035b3d12ff0386ad8b45b76dbe020257b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4182690e6a11f38a0d7254293db188589f6272a9f1f59c0ddb27f9ae61c6c78c
[INFO] running `Command { std: "docker" "start" "-a" "4182690e6a11f38a0d7254293db188589f6272a9f1f59c0ddb27f9ae61c6c78c", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.86
[INFO] [stderr]    Compiling unicode-ident v1.0.13
[INFO] [stderr]    Compiling libc v0.2.158
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling syn v2.0.77
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]     Checking zerocopy v0.7.35
[INFO] [stderr]     Checking ppv-lite86 v0.2.20
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking Learning-Rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Read` and `self`
[INFO] [stdout]  --> src/variables.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::{self, Read};
[INFO] [stdout]   |               ^^^^  ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Read` and `self`
[INFO] [stdout]  --> src/variables.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::{self, Read};
[INFO] [stdout]   |               ^^^^  ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `variables` is never used
[INFO] [stdout]  --> src/variables.rs:3:15
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub(crate) fn variables() {
[INFO] [stdout]   |               ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_word` is never used
[INFO] [stdout]   --> src/variables.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn first_word(s: &String) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `variables` is never used
[INFO] [stdout]  --> src/variables.rs:3:15
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub(crate) fn variables() {
[INFO] [stdout]   |               ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_word` is never used
[INFO] [stdout]   --> src/variables.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn first_word(s: &String) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.11s
[INFO] running `Command { std: "docker" "inspect" "4182690e6a11f38a0d7254293db188589f6272a9f1f59c0ddb27f9ae61c6c78c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4182690e6a11f38a0d7254293db188589f6272a9f1f59c0ddb27f9ae61c6c78c", kill_on_drop: false }`
[INFO] [stdout] 4182690e6a11f38a0d7254293db188589f6272a9f1f59c0ddb27f9ae61c6c78c