[INFO] cloning repository https://github.com/skytomo221/wentiay-word-selecter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/skytomo221/wentiay-word-selecter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fskytomo221%2Fwentiay-word-selecter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fskytomo221%2Fwentiay-word-selecter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f0a2d5da35f0d5ff107e3ea114b230341b9d2cbc
[INFO] checking skytomo221/wentiay-word-selecter against master#33fdb797f59421c7bbecaa4588ed5d7a31a9494a for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fskytomo221%2Fwentiay-word-selecter" "/workspace/builds/worker-15/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-15/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/skytomo221/wentiay-word-selecter on toolchain 33fdb797f59421c7bbecaa4588ed5d7a31a9494a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/skytomo221/wentiay-word-selecter
[INFO] finished tweaking git repo https://github.com/skytomo221/wentiay-word-selecter
[INFO] tweaked toml for git repo https://github.com/skytomo221/wentiay-word-selecter written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] crate git repo https://github.com/skytomo221/wentiay-word-selecter already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "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-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3e5d1bfd91afaa2d4b28e9418e1cd154c930e7c3b4d32d85fb4138edf4232ffc
[INFO] running `Command { std: "docker" "start" "-a" "3e5d1bfd91afaa2d4b28e9418e1cd154c930e7c3b4d32d85fb4138edf4232ffc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3e5d1bfd91afaa2d4b28e9418e1cd154c930e7c3b4d32d85fb4138edf4232ffc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e5d1bfd91afaa2d4b28e9418e1cd154c930e7c3b4d32d85fb4138edf4232ffc", kill_on_drop: false }`
[INFO] [stdout] 3e5d1bfd91afaa2d4b28e9418e1cd154c930e7c3b4d32d85fb4138edf4232ffc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5ebb9392674540fc92b5b20437748649ac85adc45c490ca2019fdbed334f60e9
[INFO] running `Command { std: "docker" "start" "-a" "5ebb9392674540fc92b5b20437748649ac85adc45c490ca2019fdbed334f60e9", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking tinyvec v1.3.1
[INFO] [stderr]     Checking unicode-normalization v0.1.19
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking bacitit-word-generator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/main.rs:222:17
[INFO] [stdout]     |
[INFO] [stdout] 222 | /                 &loan[start..end]
[INFO] [stdout] 223 | |                     .chars()
[INFO] [stdout] 224 | |                     .filter(|c| {
[INFO] [stdout] 225 | |                         if n % 2 == 0 {
[INFO] [stdout] ...   |
[INFO] [stdout] 232 | |                         set.insert(c);
[INFO] [stdout] 233 | |                     });
[INFO] [stdout]     | |______________________^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 222 |                 let _ = &loan[start..end]
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/main.rs:222:17
[INFO] [stdout]     |
[INFO] [stdout] 222 | /                 &loan[start..end]
[INFO] [stdout] 223 | |                     .chars()
[INFO] [stdout] 224 | |                     .filter(|c| {
[INFO] [stdout] 225 | |                         if n % 2 == 0 {
[INFO] [stdout] ...   |
[INFO] [stdout] 232 | |                         set.insert(c);
[INFO] [stdout] 233 | |                     });
[INFO] [stdout]     | |______________________^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 222 |                 let _ = &loan[start..end]
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/main.rs:237:17
[INFO] [stdout]     |
[INFO] [stdout] 237 | /                 &loan[start..end]
[INFO] [stdout] 238 | |                     .chars()
[INFO] [stdout] 239 | |                     .filter(|c| {
[INFO] [stdout] 240 | |                         if n % 2 == 0 {
[INFO] [stdout] ...   |
[INFO] [stdout] 247 | |                         set.insert(c);
[INFO] [stdout] 248 | |                     });
[INFO] [stdout]     | |______________________^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 237 |                 let _ = &loan[start..end]
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:443:13
[INFO] [stdout]     |
[INFO] [stdout] 443 |             serde_json::to_writer_pretty(&File::create("./data/result.json").unwrap(), &recipe);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/main.rs:237:17
[INFO] [stdout]     |
[INFO] [stdout] 237 | /                 &loan[start..end]
[INFO] [stdout] 238 | |                     .chars()
[INFO] [stdout] 239 | |                     .filter(|c| {
[INFO] [stdout] 240 | |                         if n % 2 == 0 {
[INFO] [stdout] ...   |
[INFO] [stdout] 247 | |                         set.insert(c);
[INFO] [stdout] 248 | |                     });
[INFO] [stdout]     | |______________________^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 237 |                 let _ = &loan[start..end]
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:443:13
[INFO] [stdout]     |
[INFO] [stdout] 443 |             serde_json::to_writer_pretty(&File::create("./data/result.json").unwrap(), &recipe);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 33.78s
[INFO] running `Command { std: "docker" "inspect" "5ebb9392674540fc92b5b20437748649ac85adc45c490ca2019fdbed334f60e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ebb9392674540fc92b5b20437748649ac85adc45c490ca2019fdbed334f60e9", kill_on_drop: false }`
[INFO] [stdout] 5ebb9392674540fc92b5b20437748649ac85adc45c490ca2019fdbed334f60e9