[INFO] cloning repository https://github.com/MozzieZhou/rust [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/MozzieZhou/rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMozzieZhou%2Frust", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMozzieZhou%2Frust'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 899a82920c6fa110489469af4ec172a8d8772bcf [INFO] checking MozzieZhou/rust against master#6a9758d4f38d4763bd437c48fa7e5246cecf8d04 for pr-124355 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMozzieZhou%2Frust" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/MozzieZhou/rust on toolchain 6a9758d4f38d4763bd437c48fa7e5246cecf8d04 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6a9758d4f38d4763bd437c48fa7e5246cecf8d04" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/MozzieZhou/rust [INFO] finished tweaking git repo https://github.com/MozzieZhou/rust [INFO] tweaked toml for git repo https://github.com/MozzieZhou/rust written to /workspace/builds/worker-2-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/MozzieZhou/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" "+6a9758d4f38d4763bd437c48fa7e5246cecf8d04" "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 MozzieZhou/rust against try#99e7531f0d1cf95a50aff9cccb24863963e6bbe2 for pr-124355 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMozzieZhou%2Frust" "/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/MozzieZhou/rust on toolchain 99e7531f0d1cf95a50aff9cccb24863963e6bbe2 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+99e7531f0d1cf95a50aff9cccb24863963e6bbe2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/MozzieZhou/rust [INFO] finished tweaking git repo https://github.com/MozzieZhou/rust [INFO] tweaked toml for git repo https://github.com/MozzieZhou/rust written to /workspace/builds/worker-2-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/MozzieZhou/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" "+99e7531f0d1cf95a50aff9cccb24863963e6bbe2" "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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+99e7531f0d1cf95a50aff9cccb24863963e6bbe2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 0563b4b0e11b20752c3c67b0687bdf4cc9eb6383dda47bbd976759affc964275 [INFO] running `Command { std: "docker" "start" "-a" "0563b4b0e11b20752c3c67b0687bdf4cc9eb6383dda47bbd976759affc964275", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "0563b4b0e11b20752c3c67b0687bdf4cc9eb6383dda47bbd976759affc964275", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "0563b4b0e11b20752c3c67b0687bdf4cc9eb6383dda47bbd976759affc964275", kill_on_drop: false }` [INFO] [stdout] 0563b4b0e11b20752c3c67b0687bdf4cc9eb6383dda47bbd976759affc964275 [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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+99e7531f0d1cf95a50aff9cccb24863963e6bbe2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 9fde54a86f43c7431e06e6f23e732a25d74a09f8958768e90e1704c3fe1798ff [INFO] running `Command { std: "docker" "start" "-a" "9fde54a86f43c7431e06e6f23e732a25d74a09f8958768e90e1704c3fe1798ff", kill_on_drop: false }` [INFO] [stderr] Checking rust_learning v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:55:13 [INFO] [stdout] | [INFO] [stdout] 55 | let mut school = School { [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `name` is never read [INFO] [stdout] --> src/main.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 3 | struct Student { [INFO] [stdout] | ------- field in this struct [INFO] [stdout] 4 | id: u32, [INFO] [stdout] 5 | name: String, [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Student` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `subject` is never read [INFO] [stdout] --> src/main.rs:26:5 [INFO] [stdout] | [INFO] [stdout] 24 | struct Course { [INFO] [stdout] | ------ field in this struct [INFO] [stdout] 25 | id: u32, [INFO] [stdout] 26 | subject: Subject, [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variants `Math`, `English`, and `Science` are never constructed [INFO] [stdout] --> src/main.rs:41:5 [INFO] [stdout] | [INFO] [stdout] 40 | enum Subject { [INFO] [stdout] | ------- variants in this enum [INFO] [stdout] 41 | Math, [INFO] [stdout] | ^^^^ [INFO] [stdout] 42 | Chinese, [INFO] [stdout] 43 | English, [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] 44 | Science, [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: methods `add_course` and `get_student_by_id` are never used [INFO] [stdout] --> src/main.rs:66:8 [INFO] [stdout] | [INFO] [stdout] 53 | impl School { [INFO] [stdout] | ----------- methods in this implementation [INFO] [stdout] ... [INFO] [stdout] 66 | fn add_course(&mut self, course: Course) { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 70 | fn get_student_by_id(&self, id: u32) -> &Student { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:55:13 [INFO] [stdout] | [INFO] [stdout] 55 | let mut school = School { [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `name` is never read [INFO] [stdout] --> src/main.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 3 | struct Student { [INFO] [stdout] | ------- field in this struct [INFO] [stdout] 4 | id: u32, [INFO] [stdout] 5 | name: String, [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Student` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `subject` is never read [INFO] [stdout] --> src/main.rs:26:5 [INFO] [stdout] | [INFO] [stdout] 24 | struct Course { [INFO] [stdout] | ------ field in this struct [INFO] [stdout] 25 | id: u32, [INFO] [stdout] 26 | subject: Subject, [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variants `Math`, `English`, and `Science` are never constructed [INFO] [stdout] --> src/main.rs:41:5 [INFO] [stdout] | [INFO] [stdout] 40 | enum Subject { [INFO] [stdout] | ------- variants in this enum [INFO] [stdout] 41 | Math, [INFO] [stdout] | ^^^^ [INFO] [stdout] 42 | Chinese, [INFO] [stdout] 43 | English, [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] 44 | Science, [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: methods `add_course` and `get_student_by_id` are never used [INFO] [stdout] --> src/main.rs:66:8 [INFO] [stdout] | [INFO] [stdout] 53 | impl School { [INFO] [stdout] | ----------- methods in this implementation [INFO] [stdout] ... [INFO] [stdout] 66 | fn add_course(&mut self, course: Course) { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 70 | fn get_student_by_id(&self, id: u32) -> &Student { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.17s [INFO] running `Command { std: "docker" "inspect" "9fde54a86f43c7431e06e6f23e732a25d74a09f8958768e90e1704c3fe1798ff", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "9fde54a86f43c7431e06e6f23e732a25d74a09f8958768e90e1704c3fe1798ff", kill_on_drop: false }` [INFO] [stdout] 9fde54a86f43c7431e06e6f23e732a25d74a09f8958768e90e1704c3fe1798ff