[INFO] cloning repository https://github.com/dmidem/merkle_tree
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dmidem/merkle_tree" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdmidem%2Fmerkle_tree", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdmidem%2Fmerkle_tree'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2363908751c7591d56b01fca1560dc217beb1340
[INFO] checking dmidem/merkle_tree against try#a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399 for pr-145770
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdmidem%2Fmerkle_tree" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/dmidem/merkle_tree
[INFO] finished tweaking git repo https://github.com/dmidem/merkle_tree
[INFO] tweaked toml for git repo https://github.com/dmidem/merkle_tree written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/dmidem/merkle_tree on toolchain a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/dmidem/merkle_tree 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" "+a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] df22c0715d557fe4037eaa9b217d3cea0106b6146557c6fef7003aff94d5ba20
[INFO] running `Command { std: "docker" "start" "-a" "df22c0715d557fe4037eaa9b217d3cea0106b6146557c6fef7003aff94d5ba20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "df22c0715d557fe4037eaa9b217d3cea0106b6146557c6fef7003aff94d5ba20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df22c0715d557fe4037eaa9b217d3cea0106b6146557c6fef7003aff94d5ba20", kill_on_drop: false }`
[INFO] [stdout] df22c0715d557fe4037eaa9b217d3cea0106b6146557c6fef7003aff94d5ba20
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7d7d6670a9b2d0c2c5b607ed809b85e9bc8604e1ad0bcc44bc75ec2145e4fb07
[INFO] running `Command { std: "docker" "start" "-a" "7d7d6670a9b2d0c2c5b607ed809b85e9bc8604e1ad0bcc44bc75ec2145e4fb07", kill_on_drop: false }`
[INFO] [stderr]     Checking merkle_tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `name`, `size`, and `chunk_size` are never read
[INFO] [stdout]   --> examples/src/file_server.rs:73:9
[INFO] [stdout]    |
[INFO] [stdout] 72 | pub struct FileInfo<'a> {
[INFO] [stdout]    |            -------- fields in this struct
[INFO] [stdout] 73 |     pub name: &'a std::ffi::OsStr,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 74 |     pub size: u64,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 75 |     pub root_hash: &'a Hash,
[INFO] [stdout] 76 |     pub chunk_size: usize,
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `FileInfo` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> examples/src/file_server.rs:161:23
[INFO] [stdout]     |
[INFO] [stdout] 161 |     pub fn list_files(&self) -> impl Iterator<Item = FileInfo> {
[INFO] [stdout]     |                       ^^^^^                          -------- the same lifetime is hidden here
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 161 |     pub fn list_files(&self) -> impl Iterator<Item = FileInfo<'_>> {
[INFO] [stdout]     |                                                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.69s
[INFO] running `Command { std: "docker" "inspect" "7d7d6670a9b2d0c2c5b607ed809b85e9bc8604e1ad0bcc44bc75ec2145e4fb07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d7d6670a9b2d0c2c5b607ed809b85e9bc8604e1ad0bcc44bc75ec2145e4fb07", kill_on_drop: false }`
[INFO] [stdout] 7d7d6670a9b2d0c2c5b607ed809b85e9bc8604e1ad0bcc44bc75ec2145e4fb07
