[INFO] cloning repository https://github.com/googlercolin/Rust_program_optimization [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/googlercolin/Rust_program_optimization" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgooglercolin%2FRust_program_optimization", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgooglercolin%2FRust_program_optimization'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 67d4c75b8df987640dd599ff883d8904fb071fd3 [INFO] building googlercolin/Rust_program_optimization against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgooglercolin%2FRust_program_optimization" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/googlercolin/Rust_program_optimization on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/googlercolin/Rust_program_optimization [INFO] finished tweaking git repo https://github.com/googlercolin/Rust_program_optimization [INFO] tweaked toml for git repo https://github.com/googlercolin/Rust_program_optimization written to /workspace/builds/worker-4-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/googlercolin/Rust_program_optimization 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 49e2a47d391a76adbe5c6e4fa068acd72666d4fb10605b47e8532689a3b0f2d8 [INFO] running `Command { std: "docker" "start" "-a" "49e2a47d391a76adbe5c6e4fa068acd72666d4fb10605b47e8532689a3b0f2d8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "49e2a47d391a76adbe5c6e4fa068acd72666d4fb10605b47e8532689a3b0f2d8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "49e2a47d391a76adbe5c6e4fa068acd72666d4fb10605b47e8532689a3b0f2d8", kill_on_drop: false }` [INFO] [stdout] 49e2a47d391a76adbe5c6e4fa068acd72666d4fb10605b47e8532689a3b0f2d8 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 9dd1a07ade10eb0f3a1689f7a3ac03eba7bc33183401f2e2bebfdf2079dccbaf [INFO] running `Command { std: "docker" "start" "-a" "9dd1a07ade10eb0f3a1689f7a3ac03eba7bc33183401f2e2bebfdf2079dccbaf", kill_on_drop: false }` [INFO] [stderr] Compiling autocfg v1.0.0 [INFO] [stderr] Compiling cfg-if v0.1.10 [INFO] [stderr] Compiling lazy_static v1.4.0 [INFO] [stderr] Compiling typenum v1.12.0 [INFO] [stderr] Compiling version_check v0.9.2 [INFO] [stderr] Compiling maybe-uninit v2.0.0 [INFO] [stderr] Compiling scopeguard v1.1.0 [INFO] [stderr] Compiling opaque-debug v0.3.0 [INFO] [stderr] Compiling cpuid-bool v0.1.2 [INFO] [stderr] Compiling hex v0.4.2 [INFO] [stderr] Compiling generic-array v0.14.4 [INFO] [stderr] Compiling crossbeam-utils v0.7.2 [INFO] [stderr] Compiling memoffset v0.5.5 [INFO] [stderr] Compiling crossbeam-epoch v0.8.2 [INFO] [stderr] Compiling crossbeam-queue v0.2.3 [INFO] [stderr] Compiling crossbeam-channel v0.4.3 [INFO] [stderr] Compiling crossbeam-deque v0.7.3 [INFO] [stderr] Compiling digest v0.9.0 [INFO] [stderr] Compiling block-buffer v0.9.0 [INFO] [stderr] Compiling crossbeam v0.7.3 [INFO] [stderr] Compiling sha2 v0.9.1 [INFO] [stderr] Compiling lab4 v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: field `num_pkgs` is never read [INFO] [stdout] --> src/idea.rs:17:5 [INFO] [stdout] | [INFO] [stdout] 13 | pub struct IdeaGenerator { [INFO] [stdout] | ------------- field in this struct [INFO] [stdout] ... [INFO] [stdout] 17 | num_pkgs: usize, [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `id` is never read [INFO] [stdout] --> src/student.rs:6:5 [INFO] [stdout] | [INFO] [stdout] 5 | pub struct Student { [INFO] [stdout] | ------- field in this struct [INFO] [stdout] 6 | id: usize, [INFO] [stdout] | ^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:153:9 [INFO] [stdout] | [INFO] [stdout] 153 | idea_send.send(Event::OutOfIdeas); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 153 | let _ = idea_send.send(Event::OutOfIdeas); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.32s [INFO] running `Command { std: "docker" "inspect" "9dd1a07ade10eb0f3a1689f7a3ac03eba7bc33183401f2e2bebfdf2079dccbaf", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "9dd1a07ade10eb0f3a1689f7a3ac03eba7bc33183401f2e2bebfdf2079dccbaf", kill_on_drop: false }` [INFO] [stdout] 9dd1a07ade10eb0f3a1689f7a3ac03eba7bc33183401f2e2bebfdf2079dccbaf [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] c6bc66a8c1e4c7e9ccef44de4576dc6f93cdd31de471b5fa13d0f5d78c1eab37 [INFO] running `Command { std: "docker" "start" "-a" "c6bc66a8c1e4c7e9ccef44de4576dc6f93cdd31de471b5fa13d0f5d78c1eab37", kill_on_drop: false }` [INFO] [stderr] Compiling lab4 v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: field `num_pkgs` is never read [INFO] [stdout] --> src/idea.rs:17:5 [INFO] [stdout] | [INFO] [stdout] 13 | pub struct IdeaGenerator { [INFO] [stdout] | ------------- field in this struct [INFO] [stdout] ... [INFO] [stdout] 17 | num_pkgs: usize, [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `id` is never read [INFO] [stdout] --> src/student.rs:6:5 [INFO] [stdout] | [INFO] [stdout] 5 | pub struct Student { [INFO] [stdout] | ------- field in this struct [INFO] [stdout] 6 | id: usize, [INFO] [stdout] | ^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `num_pkgs` is never read [INFO] [stdout] --> src/idea.rs:17:5 [INFO] [stdout] | [INFO] [stdout] 13 | pub struct IdeaGenerator { [INFO] [stdout] | ------------- field in this struct [INFO] [stdout] ... [INFO] [stdout] 17 | num_pkgs: usize, [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:153:9 [INFO] [stdout] | [INFO] [stdout] 153 | idea_send.send(Event::OutOfIdeas); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 153 | let _ = idea_send.send(Event::OutOfIdeas); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `id` is never read [INFO] [stdout] --> src/student.rs:6:5 [INFO] [stdout] | [INFO] [stdout] 5 | pub struct Student { [INFO] [stdout] | ------- field in this struct [INFO] [stdout] 6 | id: usize, [INFO] [stdout] | ^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.42s [INFO] running `Command { std: "docker" "inspect" "c6bc66a8c1e4c7e9ccef44de4576dc6f93cdd31de471b5fa13d0f5d78c1eab37", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c6bc66a8c1e4c7e9ccef44de4576dc6f93cdd31de471b5fa13d0f5d78c1eab37", kill_on_drop: false }` [INFO] [stdout] c6bc66a8c1e4c7e9ccef44de4576dc6f93cdd31de471b5fa13d0f5d78c1eab37