[INFO] cloning repository https://github.com/ddprrt/rust-task-lotto
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ddprrt/rust-task-lotto" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fddprrt%2Frust-task-lotto", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fddprrt%2Frust-task-lotto'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d3f3abb4987127dc1d1e5fdd5020d02623b828cb
[INFO] building ddprrt/rust-task-lotto 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%2Fddprrt%2Frust-task-lotto" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ddprrt/rust-task-lotto 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/ddprrt/rust-task-lotto
[INFO] finished tweaking git repo https://github.com/ddprrt/rust-task-lotto
[INFO] tweaked toml for git repo https://github.com/ddprrt/rust-task-lotto written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/ddprrt/rust-task-lotto 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-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 0a1f3f8daf7eb0d569d5556c5daca5bdcad5934b1a143b6eb04cf0851df11d06
[INFO] running `Command { std: "docker" "start" "-a" "0a1f3f8daf7eb0d569d5556c5daca5bdcad5934b1a143b6eb04cf0851df11d06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0a1f3f8daf7eb0d569d5556c5daca5bdcad5934b1a143b6eb04cf0851df11d06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a1f3f8daf7eb0d569d5556c5daca5bdcad5934b1a143b6eb04cf0851df11d06", kill_on_drop: false }`
[INFO] [stdout] 0a1f3f8daf7eb0d569d5556c5daca5bdcad5934b1a143b6eb04cf0851df11d06
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 26205cbb3bc115e3fafa627992a8859882bdea8571957a460e07863101519e4c
[INFO] running `Command { std: "docker" "start" "-a" "26205cbb3bc115e3fafa627992a8859882bdea8571957a460e07863101519e4c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.107
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.15
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]    Compiling rust-task-lotto v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `prelude::IteratorRandom` and `thread_rng`
[INFO] [stdout]  --> src/main.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | use rand::{prelude::IteratorRandom, thread_rng};
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `take`
[INFO] [stdout]   --> src/main.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn new(take: usize, from: usize) -> Self {
[INFO] [stdout]    |            ^^^^ help: if this is intentional, prefix it with an underscore: `_take`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `from`
[INFO] [stdout]   --> src/main.rs:12:25
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn new(take: usize, from: usize) -> Self {
[INFO] [stdout]    |                         ^^^^ help: if this is intentional, prefix it with an underscore: `_from`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lotto`
[INFO] [stdout]   --> src/main.rs:17:25
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn format_lotto_results(lotto: &Lotto) -> String {
[INFO] [stdout]    |                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_lotto`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]   --> src/main.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let args: Vec<String> = env::args().collect();
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Lotto` is never constructed
[INFO] [stdout]  --> src/main.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Lotto {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/main.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl Lotto {
[INFO] [stdout]    | ---------- associated function in this implementation
[INFO] [stdout] 12 |     fn new(take: usize, from: usize) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `format_lotto_results` is never used
[INFO] [stdout]   --> src/main.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn format_lotto_results(lotto: &Lotto) -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.55s
[INFO] running `Command { std: "docker" "inspect" "26205cbb3bc115e3fafa627992a8859882bdea8571957a460e07863101519e4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26205cbb3bc115e3fafa627992a8859882bdea8571957a460e07863101519e4c", kill_on_drop: false }`
[INFO] [stdout] 26205cbb3bc115e3fafa627992a8859882bdea8571957a460e07863101519e4c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] c286eeb5e0522cb918b6599f8fe07a07cdf4690f2f4938eeda0a4e854fc0fde3
[INFO] running `Command { std: "docker" "start" "-a" "c286eeb5e0522cb918b6599f8fe07a07cdf4690f2f4938eeda0a4e854fc0fde3", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-task-lotto v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `prelude::IteratorRandom` and `thread_rng`
[INFO] [stdout]  --> src/main.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | use rand::{prelude::IteratorRandom, thread_rng};
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `take`
[INFO] [stdout]   --> src/main.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn new(take: usize, from: usize) -> Self {
[INFO] [stdout]    |            ^^^^ help: if this is intentional, prefix it with an underscore: `_take`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `from`
[INFO] [stdout]   --> src/main.rs:12:25
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn new(take: usize, from: usize) -> Self {
[INFO] [stdout]    |                         ^^^^ help: if this is intentional, prefix it with an underscore: `_from`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lotto`
[INFO] [stdout]   --> src/main.rs:17:25
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn format_lotto_results(lotto: &Lotto) -> String {
[INFO] [stdout]    |                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_lotto`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]   --> src/main.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let args: Vec<String> = env::args().collect();
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `take` and `from` are never read
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Lotto {
[INFO] [stdout]   |        ----- fields in this struct
[INFO] [stdout] 6 |     take: usize,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 7 |     from: usize,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.17s
[INFO] running `Command { std: "docker" "inspect" "c286eeb5e0522cb918b6599f8fe07a07cdf4690f2f4938eeda0a4e854fc0fde3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c286eeb5e0522cb918b6599f8fe07a07cdf4690f2f4938eeda0a4e854fc0fde3", kill_on_drop: false }`
[INFO] [stdout] c286eeb5e0522cb918b6599f8fe07a07cdf4690f2f4938eeda0a4e854fc0fde3