[INFO] cloning repository https://github.com/raagnair/leetcrab
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/raagnair/leetcrab" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fraagnair%2Fleetcrab", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fraagnair%2Fleetcrab'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2cd2419486187e0da3ac28f16659e7abef27572a
[INFO] testing raagnair/leetcrab against 1.90.0 for beta-1.91-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fraagnair%2Fleetcrab" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/raagnair/leetcrab
[INFO] finished tweaking git repo https://github.com/raagnair/leetcrab
[INFO] tweaked toml for git repo https://github.com/raagnair/leetcrab written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/raagnair/leetcrab on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/raagnair/leetcrab 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" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 257f99ec5dcb5e707336c8e137718fc96a841d7556b545a6731165efb6a7628b
[INFO] running `Command { std: "docker" "start" "-a" "257f99ec5dcb5e707336c8e137718fc96a841d7556b545a6731165efb6a7628b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "257f99ec5dcb5e707336c8e137718fc96a841d7556b545a6731165efb6a7628b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "257f99ec5dcb5e707336c8e137718fc96a841d7556b545a6731165efb6a7628b", kill_on_drop: false }`
[INFO] [stdout] 257f99ec5dcb5e707336c8e137718fc96a841d7556b545a6731165efb6a7628b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] da3443948e08693995d9746ce3864021f1fad5194ea73c032030d7f473807e91
[INFO] running `Command { std: "docker" "start" "-a" "da3443948e08693995d9746ce3864021f1fad5194ea73c032030d7f473807e91", kill_on_drop: false }`
[INFO] [stderr]    Compiling leetcrab v0.71.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `last_iter` is never read
[INFO] [stdout]   --> src/solutions/s0017_letter_combinations.rs:33:13
[INFO] [stdout]    |
[INFO] [stdout] 33 |     let mut last_iter = vec![];
[INFO] [stdout]    |             ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.38s
[INFO] running `Command { std: "docker" "inspect" "da3443948e08693995d9746ce3864021f1fad5194ea73c032030d7f473807e91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "da3443948e08693995d9746ce3864021f1fad5194ea73c032030d7f473807e91", kill_on_drop: false }`
[INFO] [stdout] da3443948e08693995d9746ce3864021f1fad5194ea73c032030d7f473807e91
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0ef725e21bb5233dae86ba5fef5a99b620f7e067395a634ce186cb3036121965
[INFO] running `Command { std: "docker" "start" "-a" "0ef725e21bb5233dae86ba5fef5a99b620f7e067395a634ce186cb3036121965", kill_on_drop: false }`
[INFO] [stderr]    Compiling leetcrab v0.71.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `last_iter` is never read
[INFO] [stdout]   --> src/solutions/s0017_letter_combinations.rs:33:13
[INFO] [stdout]    |
[INFO] [stdout] 33 |     let mut last_iter = vec![];
[INFO] [stdout]    |             ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.25s
[INFO] running `Command { std: "docker" "inspect" "0ef725e21bb5233dae86ba5fef5a99b620f7e067395a634ce186cb3036121965", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ef725e21bb5233dae86ba5fef5a99b620f7e067395a634ce186cb3036121965", kill_on_drop: false }`
[INFO] [stdout] 0ef725e21bb5233dae86ba5fef5a99b620f7e067395a634ce186cb3036121965
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 8b757488977bc56b6e3b0fd84617e8a6864d196fb6ac074a45483d1660d71e1d
[INFO] running `Command { std: "docker" "start" "-a" "8b757488977bc56b6e3b0fd84617e8a6864d196fb6ac074a45483d1660d71e1d", kill_on_drop: false }`
[INFO] [stderr] warning: value assigned to `last_iter` is never read
[INFO] [stderr]   --> src/solutions/s0017_letter_combinations.rs:33:13
[INFO] [stderr]    |
[INFO] [stderr] 33 |     let mut last_iter = vec![];
[INFO] [stderr]    |             ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `leetcrab` (bin "leetcrab" test) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/leetcrab-9c9adbcf6b2203bb)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "8b757488977bc56b6e3b0fd84617e8a6864d196fb6ac074a45483d1660d71e1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b757488977bc56b6e3b0fd84617e8a6864d196fb6ac074a45483d1660d71e1d", kill_on_drop: false }`
[INFO] [stdout] 8b757488977bc56b6e3b0fd84617e8a6864d196fb6ac074a45483d1660d71e1d