[INFO] cloning repository https://github.com/vlaship/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/vlaship/learning-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvlaship%2Flearning-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvlaship%2Flearning-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 054b2e5b5144d1afe58a7006c3a5301c4d4cdf21
[INFO] checking vlaship/learning-rust against try#9053a8ad740a9e131b53ea98acecf68cf79134fe for pr-137045
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvlaship%2Flearning-rust" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] [stderr] error: Unable to create '/workspace/builds/worker-2-tc2/source/.git/refs/remotes/origin/HEAD.lock': No such file or directory
[INFO] [stderr] fatal: unable to update refs/remotes/origin/HEAD
[INFO] checking vlaship/learning-rust against try#9053a8ad740a9e131b53ea98acecf68cf79134fe for pr-137045
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvlaship%2Flearning-rust" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/vlaship/learning-rust on toolchain 9053a8ad740a9e131b53ea98acecf68cf79134fe
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9053a8ad740a9e131b53ea98acecf68cf79134fe" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/vlaship/learning-rust
[INFO] finished tweaking git repo https://github.com/vlaship/learning-rust
[INFO] tweaked toml for git repo https://github.com/vlaship/learning-rust written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/vlaship/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" "+9053a8ad740a9e131b53ea98acecf68cf79134fe" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+9053a8ad740a9e131b53ea98acecf68cf79134fe" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 79917f7ad0c3677923d05587d6446c1b6ce4002e244800bc169882f8d8c52cd7
[INFO] running `Command { std: "docker" "start" "-a" "79917f7ad0c3677923d05587d6446c1b6ce4002e244800bc169882f8d8c52cd7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "79917f7ad0c3677923d05587d6446c1b6ce4002e244800bc169882f8d8c52cd7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79917f7ad0c3677923d05587d6446c1b6ce4002e244800bc169882f8d8c52cd7", kill_on_drop: false }`
[INFO] [stdout] 79917f7ad0c3677923d05587d6446c1b6ce4002e244800bc169882f8d8c52cd7
[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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+9053a8ad740a9e131b53ea98acecf68cf79134fe" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1a10946da3908dc1849f7000f3d38799ca306713ef58d6b2e99708242cd37de0
[INFO] running `Command { std: "docker" "start" "-a" "1a10946da3908dc1849f7000f3d38799ca306713ef58d6b2e99708242cd37de0", kill_on_drop: false }`
[INFO] [stderr]     Checking app1 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `aa`
[INFO] [stdout]   --> src/main.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let aa = Person {
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_aa`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pep`
[INFO] [stdout]   --> src/main.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let pep = ManyPersons {};
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_pep`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `aa`
[INFO] [stdout]   --> src/main.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let aa = Person {
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_aa`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pep`
[INFO] [stdout]   --> src/main.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let pep = ManyPersons {};
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_pep`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `first_name` and `last_name` are never read
[INFO] [stdout]  --> src/person.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Person {
[INFO] [stdout]   |            ------ fields in this struct
[INFO] [stdout] 2 |     pub first_name: String,
[INFO] [stdout]   |         ^^^^^^^^^^
[INFO] [stdout] 3 |     pub last_name: String,
[INFO] [stdout]   |         ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `first_name` and `last_name` are never read
[INFO] [stdout]  --> src/person.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Person {
[INFO] [stdout]   |            ------ fields in this struct
[INFO] [stdout] 2 |     pub first_name: String,
[INFO] [stdout]   |         ^^^^^^^^^^
[INFO] [stdout] 3 |     pub last_name: String,
[INFO] [stdout]   |         ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] running `Command { std: "docker" "inspect" "1a10946da3908dc1849f7000f3d38799ca306713ef58d6b2e99708242cd37de0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a10946da3908dc1849f7000f3d38799ca306713ef58d6b2e99708242cd37de0", kill_on_drop: false }`
[INFO] [stdout] 1a10946da3908dc1849f7000f3d38799ca306713ef58d6b2e99708242cd37de0