[INFO] cloning repository https://github.com/hlhfootball/rust-work3
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hlhfootball/rust-work3" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhlhfootball%2Frust-work3", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhlhfootball%2Frust-work3'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3360ad7591958807526722736836381e394ca3de
[INFO] checking hlhfootball/rust-work3 against master#00bfd6b2734d9c28a147bf237490995731781fdd for pr-117984
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhlhfootball%2Frust-work3" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hlhfootball/rust-work3 on toolchain 00bfd6b2734d9c28a147bf237490995731781fdd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+00bfd6b2734d9c28a147bf237490995731781fdd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hlhfootball/rust-work3
[INFO] finished tweaking git repo https://github.com/hlhfootball/rust-work3
[INFO] tweaked toml for git repo https://github.com/hlhfootball/rust-work3 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/hlhfootball/rust-work3 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" "+00bfd6b2734d9c28a147bf237490995731781fdd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking hlhfootball/rust-work3 against try#aa7c6ba69acce8b10a275eabfe6157ea72c8b599 for pr-117984
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhlhfootball%2Frust-work3" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hlhfootball/rust-work3 on toolchain aa7c6ba69acce8b10a275eabfe6157ea72c8b599
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+aa7c6ba69acce8b10a275eabfe6157ea72c8b599" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hlhfootball/rust-work3
[INFO] finished tweaking git repo https://github.com/hlhfootball/rust-work3
[INFO] tweaked toml for git repo https://github.com/hlhfootball/rust-work3 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/hlhfootball/rust-work3 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" "+aa7c6ba69acce8b10a275eabfe6157ea72c8b599" "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
[ERROR] error running command: no output for 300 seconds
[INFO] checking hlhfootball/rust-work3 against try#aa7c6ba69acce8b10a275eabfe6157ea72c8b599 for pr-117984
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhlhfootball%2Frust-work3" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hlhfootball/rust-work3 on toolchain aa7c6ba69acce8b10a275eabfe6157ea72c8b599
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+aa7c6ba69acce8b10a275eabfe6157ea72c8b599" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hlhfootball/rust-work3
[INFO] finished tweaking git repo https://github.com/hlhfootball/rust-work3
[INFO] tweaked toml for git repo https://github.com/hlhfootball/rust-work3 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/hlhfootball/rust-work3 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" "+aa7c6ba69acce8b10a275eabfe6157ea72c8b599" "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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+aa7c6ba69acce8b10a275eabfe6157ea72c8b599" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 30e351d1f20b65baf858d98c4f4337f135e971464947ebc97a6f6dea635c1f68
[INFO] running `Command { std: "docker" "start" "-a" "30e351d1f20b65baf858d98c4f4337f135e971464947ebc97a6f6dea635c1f68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "30e351d1f20b65baf858d98c4f4337f135e971464947ebc97a6f6dea635c1f68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "30e351d1f20b65baf858d98c4f4337f135e971464947ebc97a6f6dea635c1f68", kill_on_drop: false }`
[INFO] [stdout] 30e351d1f20b65baf858d98c4f4337f135e971464947ebc97a6f6dea635c1f68
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+aa7c6ba69acce8b10a275eabfe6157ea72c8b599" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2334c026a162915a459dbb4c8ac810535280dde5ed681b39ad0c4365dc1273ac
[INFO] running `Command { std: "docker" "start" "-a" "2334c026a162915a459dbb4c8ac810535280dde5ed681b39ad0c4365dc1273ac", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-work3 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `name` and `class_id` are never read
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Student {
[INFO] [stdout]   |            ------- fields in this struct
[INFO] [stdout] 5 |     id: u32,
[INFO] [stdout] 6 |     name: String,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 7 |     class_id: u32,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Student` 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: fields `id`, `name`, and `member_ids` are never read
[INFO] [stdout]   --> src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Club {
[INFO] [stdout]    |            ---- fields in this struct
[INFO] [stdout] 11 |     id: u32,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 12 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 13 |     member_ids: Vec<u32>,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id`, `name`, and `student_ids` are never read
[INFO] [stdout]   --> src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub struct Class {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 17 |     id: u32,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 18 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 19 |     student_ids: Vec<u32>,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id`, `name`, and `class_id` are never read
[INFO] [stdout]   --> src/main.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub struct Course {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] 23 |     id: u32,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 24 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 25 |     class_id: u32,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `clubs`, `classes`, and `courses` are never read
[INFO] [stdout]   --> src/main.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct StudentManagementSystem {
[INFO] [stdout]    |            ----------------------- fields in this struct
[INFO] [stdout] 29 |     students: HashMap<u32, Student>,
[INFO] [stdout] 30 |     clubs: HashMap<u32, Club>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 31 |     classes: HashMap<u32, Class>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 32 |     courses: HashMap<u32, Course>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `class_id` are never read
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Student {
[INFO] [stdout]   |            ------- fields in this struct
[INFO] [stdout] 5 |     id: u32,
[INFO] [stdout] 6 |     name: String,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 7 |     class_id: u32,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Student` 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: fields `id`, `name`, and `member_ids` are never read
[INFO] [stdout]   --> src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Club {
[INFO] [stdout]    |            ---- fields in this struct
[INFO] [stdout] 11 |     id: u32,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 12 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 13 |     member_ids: Vec<u32>,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id`, `name`, and `student_ids` are never read
[INFO] [stdout]   --> src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub struct Class {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 17 |     id: u32,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 18 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 19 |     student_ids: Vec<u32>,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id`, `name`, and `class_id` are never read
[INFO] [stdout]   --> src/main.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub struct Course {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] 23 |     id: u32,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 24 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 25 |     class_id: u32,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `clubs`, `classes`, and `courses` are never read
[INFO] [stdout]   --> src/main.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct StudentManagementSystem {
[INFO] [stdout]    |            ----------------------- fields in this struct
[INFO] [stdout] 29 |     students: HashMap<u32, Student>,
[INFO] [stdout] 30 |     clubs: HashMap<u32, Club>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 31 |     classes: HashMap<u32, Class>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 32 |     courses: HashMap<u32, Course>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] running `Command { std: "docker" "inspect" "2334c026a162915a459dbb4c8ac810535280dde5ed681b39ad0c4365dc1273ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2334c026a162915a459dbb4c8ac810535280dde5ed681b39ad0c4365dc1273ac", kill_on_drop: false }`
[INFO] [stdout] 2334c026a162915a459dbb4c8ac810535280dde5ed681b39ad0c4365dc1273ac