[INFO] cloning repository https://github.com/haoxue-tutor/haoxue-ai
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/haoxue-tutor/haoxue-ai" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhaoxue-tutor%2Fhaoxue-ai", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhaoxue-tutor%2Fhaoxue-ai'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9fc730afa06e3531d8287bc31a6d789bafc4a501
[INFO] building haoxue-tutor/haoxue-ai 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%2Fhaoxue-tutor%2Fhaoxue-ai" "/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/haoxue-tutor/haoxue-ai 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/haoxue-tutor/haoxue-ai
[INFO] finished tweaking git repo https://github.com/haoxue-tutor/haoxue-ai
[INFO] tweaked toml for git repo https://github.com/haoxue-tutor/haoxue-ai written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/haoxue-tutor/haoxue-ai 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded unicode-blocks v0.1.8
[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] fddacd22444ed1c8f0431d4691d0cf2f7864cee3ec59283c35485fe6c59c85f8
[INFO] running `Command { std: "docker" "start" "-a" "fddacd22444ed1c8f0431d4691d0cf2f7864cee3ec59283c35485fe6c59c85f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fddacd22444ed1c8f0431d4691d0cf2f7864cee3ec59283c35485fe6c59c85f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fddacd22444ed1c8f0431d4691d0cf2f7864cee3ec59283c35485fe6c59c85f8", kill_on_drop: false }`
[INFO] [stdout] fddacd22444ed1c8f0431d4691d0cf2f7864cee3ec59283c35485fe6c59c85f8
[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] c6cc05447c0976eb45aadfd88b20e7782722d54a374c8183f97816b506b676df
[INFO] running `Command { std: "docker" "start" "-a" "c6cc05447c0976eb45aadfd88b20e7782722d54a374c8183f97816b506b676df", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-blocks v0.1.8
[INFO] [stderr]    Compiling base64 v0.21.5
[INFO] [stderr]    Compiling haoxue-ai v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `hsk3`
[INFO] [stdout]   --> src/main.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let hsk3 = word_set("HSK 3.txt");
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_hsk3`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hsk4`
[INFO] [stdout]   --> src/main.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let hsk4 = word_set("HSK 4.txt");
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_hsk4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hsk5`
[INFO] [stdout]   --> src/main.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let hsk5 = word_set("HSK 5.txt");
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_hsk5`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hsk6`
[INFO] [stdout]   --> src/main.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let hsk6 = word_set("HSK 6.txt");
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_hsk6`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `good_set`
[INFO] [stdout]   --> src/main.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let good_set: HashSet<char> = HashSet::from_iter(
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_good_set`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.93s
[INFO] running `Command { std: "docker" "inspect" "c6cc05447c0976eb45aadfd88b20e7782722d54a374c8183f97816b506b676df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c6cc05447c0976eb45aadfd88b20e7782722d54a374c8183f97816b506b676df", kill_on_drop: false }`
[INFO] [stdout] c6cc05447c0976eb45aadfd88b20e7782722d54a374c8183f97816b506b676df
[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] 873c43d570123cf322e956e63725bb61464117637ddcc1a15c6c88e11bc02223
[INFO] running `Command { std: "docker" "start" "-a" "873c43d570123cf322e956e63725bb61464117637ddcc1a15c6c88e11bc02223", kill_on_drop: false }`
[INFO] [stderr]    Compiling haoxue-ai v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `hsk3`
[INFO] [stdout]   --> src/main.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let hsk3 = word_set("HSK 3.txt");
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_hsk3`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hsk4`
[INFO] [stdout]   --> src/main.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let hsk4 = word_set("HSK 4.txt");
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_hsk4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hsk5`
[INFO] [stdout]   --> src/main.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let hsk5 = word_set("HSK 5.txt");
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_hsk5`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hsk6`
[INFO] [stdout]   --> src/main.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let hsk6 = word_set("HSK 6.txt");
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_hsk6`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `good_set`
[INFO] [stdout]   --> src/main.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let good_set: HashSet<char> = HashSet::from_iter(
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_good_set`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.30s
[INFO] running `Command { std: "docker" "inspect" "873c43d570123cf322e956e63725bb61464117637ddcc1a15c6c88e11bc02223", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "873c43d570123cf322e956e63725bb61464117637ddcc1a15c6c88e11bc02223", kill_on_drop: false }`
[INFO] [stdout] 873c43d570123cf322e956e63725bb61464117637ddcc1a15c6c88e11bc02223