[INFO] cloning repository https://github.com/juwonk1018/rust-practice
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/juwonk1018/rust-practice" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjuwonk1018%2Frust-practice", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjuwonk1018%2Frust-practice'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4c90812c0ffa600d3bb25921c457954e36ba7e5f
[INFO] checking juwonk1018/rust-practice against try#51de2e90f91fdec6cf64ff542a4e15b9c177a797 for pr-147294
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjuwonk1018%2Frust-practice" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/juwonk1018/rust-practice
[INFO] finished tweaking git repo https://github.com/juwonk1018/rust-practice
[INFO] tweaked toml for git repo https://github.com/juwonk1018/rust-practice written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/juwonk1018/rust-practice on toolchain 51de2e90f91fdec6cf64ff542a4e15b9c177a797
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+51de2e90f91fdec6cf64ff542a4e15b9c177a797" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/juwonk1018/rust-practice 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" "+51de2e90f91fdec6cf64ff542a4e15b9c177a797" "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-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+51de2e90f91fdec6cf64ff542a4e15b9c177a797" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e1634fafb2b1c847b3286c7ff225aba04fea202f80023a28e15639035b66bb75
[INFO] running `Command { std: "docker" "start" "-a" "e1634fafb2b1c847b3286c7ff225aba04fea202f80023a28e15639035b66bb75", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e1634fafb2b1c847b3286c7ff225aba04fea202f80023a28e15639035b66bb75", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e1634fafb2b1c847b3286c7ff225aba04fea202f80023a28e15639035b66bb75", kill_on_drop: false }`
[INFO] [stdout] e1634fafb2b1c847b3286c7ff225aba04fea202f80023a28e15639035b66bb75
[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=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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+51de2e90f91fdec6cf64ff542a4e15b9c177a797" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d39fa62c2fc0be4e65525dfb9ec3de386890ca8db1d1e72bd2df3dc52c5bde4f
[INFO] running `Command { std: "docker" "start" "-a" "d39fa62c2fc0be4e65525dfb9ec3de386890ca8db1d1e72bd2df3dc52c5bde4f", kill_on_drop: false }`
[INFO] [stderr]     Checking library-practice-1 v0.1.0 (/opt/rustwide/workdir/library-practice-1)
[INFO] [stderr]     Checking rust-practice v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `thread_control::*`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use thread_control::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `thread_control::*`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use thread_control::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `drop` is never used
[INFO] [stdout]   --> src/ownership/ownership.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout]  6 | impl User {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 38 |     fn drop(self) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `drop` is never used
[INFO] [stdout]   --> src/ownership/ownership.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout]  6 | impl User {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 38 |     fn drop(self) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.12s
[INFO] running `Command { std: "docker" "inspect" "d39fa62c2fc0be4e65525dfb9ec3de386890ca8db1d1e72bd2df3dc52c5bde4f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d39fa62c2fc0be4e65525dfb9ec3de386890ca8db1d1e72bd2df3dc52c5bde4f", kill_on_drop: false }`
[INFO] [stdout] d39fa62c2fc0be4e65525dfb9ec3de386890ca8db1d1e72bd2df3dc52c5bde4f