[INFO] cloning repository https://github.com/t-desmond/file_system_simulation
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/t-desmond/file_system_simulation" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ft-desmond%2Ffile_system_simulation", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ft-desmond%2Ffile_system_simulation'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 21101e119c48876e204e909d55f6033a22d3aed0
[INFO] checking t-desmond/file_system_simulation against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ft-desmond%2Ffile_system_simulation" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/t-desmond/file_system_simulation
[INFO] finished tweaking git repo https://github.com/t-desmond/file_system_simulation
[INFO] tweaked toml for git repo https://github.com/t-desmond/file_system_simulation written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/t-desmond/file_system_simulation on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/t-desmond/file_system_simulation 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" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b20e79fb87d264f8cb1c3daafd05205d14c191132d5a9690b2942b53eb6bc72a
[INFO] running `Command { std: "docker" "start" "-a" "b20e79fb87d264f8cb1c3daafd05205d14c191132d5a9690b2942b53eb6bc72a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b20e79fb87d264f8cb1c3daafd05205d14c191132d5a9690b2942b53eb6bc72a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b20e79fb87d264f8cb1c3daafd05205d14c191132d5a9690b2942b53eb6bc72a", kill_on_drop: false }`
[INFO] [stdout] b20e79fb87d264f8cb1c3daafd05205d14c191132d5a9690b2942b53eb6bc72a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 449264501f58877c57a58acb7d6ea8aeb968a537f6468f875cfa6933b282f963
[INFO] running `Command { std: "docker" "start" "-a" "449264501f58877c57a58acb7d6ea8aeb968a537f6468f875cfa6933b282f963", kill_on_drop: false }`
[INFO] [stderr]     Checking file_system v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: enum `FileSystemItem` is never used
[INFO] [stdout]  --> src/enums.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub enum FileSystemItem {
[INFO] [stdout]   |          ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_size` is never used
[INFO] [stdout]  --> src/traits/file_system_item.rs:4:6
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub trait FileSystemItem: Debug {
[INFO] [stdout]   |           -------------- method in this trait
[INFO] [stdout] 4 |   fn get_size(&self) -> usize;
[INFO] [stdout]   |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/folder.rs:20:17
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn iter(&self) -> FolderIterator {
[INFO] [stdout]    |                 ^^^^^     -------------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn iter(&self) -> FolderIterator<'_> {
[INFO] [stdout]    |                                         ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `FileSystemItem` is never used
[INFO] [stdout]  --> src/enums.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub enum FileSystemItem {
[INFO] [stdout]   |          ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_size` is never used
[INFO] [stdout]  --> src/traits/file_system_item.rs:4:6
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub trait FileSystemItem: Debug {
[INFO] [stdout]   |           -------------- method in this trait
[INFO] [stdout] 4 |   fn get_size(&self) -> usize;
[INFO] [stdout]   |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/folder.rs:20:17
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn iter(&self) -> FolderIterator {
[INFO] [stdout]    |                 ^^^^^     -------------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn iter(&self) -> FolderIterator<'_> {
[INFO] [stdout]    |                                         ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.20s
[INFO] running `Command { std: "docker" "inspect" "449264501f58877c57a58acb7d6ea8aeb968a537f6468f875cfa6933b282f963", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "449264501f58877c57a58acb7d6ea8aeb968a537f6468f875cfa6933b282f963", kill_on_drop: false }`
[INFO] [stdout] 449264501f58877c57a58acb7d6ea8aeb968a537f6468f875cfa6933b282f963