[INFO] cloning repository https://github.com/APSN4/learning-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/APSN4/learning-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAPSN4%2Flearning-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAPSN4%2Flearning-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 79f984923df34e696cb58a3d0dab740632c2a853
[INFO] checking APSN4/learning-rust against master#568b11762723b001bfa693d0f21c5dad01d4e813 for pr-148190
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAPSN4%2Flearning-rust" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/APSN4/learning-rust
[INFO] finished tweaking git repo https://github.com/APSN4/learning-rust
[INFO] tweaked toml for git repo https://github.com/APSN4/learning-rust written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/APSN4/learning-rust on toolchain 568b11762723b001bfa693d0f21c5dad01d4e813
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+568b11762723b001bfa693d0f21c5dad01d4e813" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/APSN4/learning-rust 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" "+568b11762723b001bfa693d0f21c5dad01d4e813" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded proc-macro2 v1.0.96
[INFO] [stderr]   Downloaded escargot v0.5.14
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+568b11762723b001bfa693d0f21c5dad01d4e813" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c75e25047dc160ee5a523ca39f341047d99cbe9db8600bd47b745d938309c4db
[INFO] running `Command { std: "docker" "start" "-a" "c75e25047dc160ee5a523ca39f341047d99cbe9db8600bd47b745d938309c4db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c75e25047dc160ee5a523ca39f341047d99cbe9db8600bd47b745d938309c4db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c75e25047dc160ee5a523ca39f341047d99cbe9db8600bd47b745d938309c4db", kill_on_drop: false }`
[INFO] [stdout] c75e25047dc160ee5a523ca39f341047d99cbe9db8600bd47b745d938309c4db
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+568b11762723b001bfa693d0f21c5dad01d4e813" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ba9cf088b126dabebaae39a409520ba87b49f7943eed29f5baa2864168ba9bd6
[INFO] running `Command { std: "docker" "start" "-a" "ba9cf088b126dabebaae39a409520ba87b49f7943eed29f5baa2864168ba9bd6", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.96
[INFO] [stderr]     Checking common v0.1.0 (/opt/rustwide/workdir/helpers/common)
[INFO] [stderr]    Compiling serde_json v1.0.142
[INFO] [stderr]    Compiling thiserror v2.0.12
[INFO] [stderr]     Checking anyhow v1.0.98
[INFO] [stderr]     Checking sync_wrapper v1.0.2
[INFO] [stderr]     Checking parking_lot_core v0.9.11
[INFO] [stderr]     Checking socket2 v0.6.0
[INFO] [stderr]     Checking mio v1.0.4
[INFO] [stderr]     Checking signal-hook-registry v1.4.6
[INFO] [stderr]     Checking tracing v0.1.41
[INFO] [stderr]     Checking matchit v0.8.4
[INFO] [stderr]    Compiling escargot v0.5.14
[INFO] [stderr]     Checking task_packages v0.1.0 (/opt/rustwide/workdir/TicketV2/Packages/Task)
[INFO] [stderr]     Checking task_saturating_arithmetic v0.1.0 (/opt/rustwide/workdir/ABasicCalculator/SaturatingArithmetic/Task)
[INFO] [stderr]     Checking task_nullability v0.1.0 (/opt/rustwide/workdir/TicketV2/Nullability/Task)
[INFO] [stderr]     Checking task_slices v0.1.0 (/opt/rustwide/workdir/TicketManagement/Slices/Task)
[INFO] [stderr]     Checking task_destructors v0.1.0 (/opt/rustwide/workdir/TicketV1/Destructors/Task)
[INFO] [stderr]     Checking task_drop_trait v0.1.0 (/opt/rustwide/workdir/Traits/DropTrait/Task)
[INFO] [stderr]     Checking task_ownership v0.1.0 (/opt/rustwide/workdir/TicketV1/Ownership/Task)
[INFO] [stderr]     Checking task_heap v0.1.0 (/opt/rustwide/workdir/TicketV1/Heap/Task)
[INFO] [stdout] error: unexpected closing delimiter: `}`
[INFO] [stdout]   --> TicketV1/Ownership/Task/src/lib.rs:45:6
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl Ticket {
[INFO] [stdout]    |             - this delimiter might not be properly closed...
[INFO] [stdout] ...
[INFO] [stdout] 40 |     }}
[INFO] [stdout]    |      - ...as it matches this but it has different indentation
[INFO] [stdout] ...
[INFO] [stdout] 45 |     }}
[INFO] [stdout]    |      ^ unexpected closing delimiter
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking task_ticket_v2_intro v0.1.0 (/opt/rustwide/workdir/TicketV2/Introduction/Ticket v2 - Introduction)
[INFO] [stderr]     Checking task_loops_for v0.1.0 (/opt/rustwide/workdir/ABasicCalculator/LoopsFor/Task)
[INFO] [stderr] error: could not compile `task_ownership` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> TicketV2/Nullability/Task/src/lib.rs:38:34
[INFO] [stdout]    |
[INFO] [stdout] 38 |     pub fn assigned_to(&self) -> Option<&String> {
[INFO] [stdout]    |            -----------           ^^^^^^^^^^^^^^^ expected `Option<&String>`, found `()`
[INFO] [stdout]    |            |
[INFO] [stdout]    |            implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stdout]    |
[INFO] [stdout]    = note:   expected enum `Option<&String>`
[INFO] [stdout]            found unit type `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `task_nullability` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "ba9cf088b126dabebaae39a409520ba87b49f7943eed29f5baa2864168ba9bd6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba9cf088b126dabebaae39a409520ba87b49f7943eed29f5baa2864168ba9bd6", kill_on_drop: false }`
[INFO] [stdout] ba9cf088b126dabebaae39a409520ba87b49f7943eed29f5baa2864168ba9bd6
