[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#cf8a95590a1b768b7711f2631d5b5e3ead464de7 for pr-149389
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAPSN4%2Flearning-rust" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-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-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/APSN4/learning-rust on toolchain cf8a95590a1b768b7711f2631d5b5e3ead464de7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf8a95590a1b768b7711f2631d5b5e3ead464de7" "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" "+cf8a95590a1b768b7711f2631d5b5e3ead464de7" "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] [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-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+cf8a95590a1b768b7711f2631d5b5e3ead464de7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ba1614294aeeff8a400a0fdefeca2a74ad7bbf484c104184fc86999d6f0e53e9
[INFO] running `Command { std: "docker" "start" "-a" "ba1614294aeeff8a400a0fdefeca2a74ad7bbf484c104184fc86999d6f0e53e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ba1614294aeeff8a400a0fdefeca2a74ad7bbf484c104184fc86999d6f0e53e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba1614294aeeff8a400a0fdefeca2a74ad7bbf484c104184fc86999d6f0e53e9", kill_on_drop: false }`
[INFO] [stdout] ba1614294aeeff8a400a0fdefeca2a74ad7bbf484c104184fc86999d6f0e53e9
[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" "-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" "+cf8a95590a1b768b7711f2631d5b5e3ead464de7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 706e4ced6931cf86b7563223863d8fde255dbc9627a8d708651ea316a001d991
[INFO] running `Command { std: "docker" "start" "-a" "706e4ced6931cf86b7563223863d8fde255dbc9627a8d708651ea316a001d991", 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 anyhow v1.0.98
[INFO] [stderr]    Compiling serde_json v1.0.142
[INFO] [stderr]    Compiling rustversion v1.0.22
[INFO] [stderr]     Checking sync_wrapper v1.0.2
[INFO] [stderr]     Checking signal-hook-registry v1.4.6
[INFO] [stderr]     Checking tracing v0.1.41
[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_nullability v0.1.0 (/opt/rustwide/workdir/TicketV2/Nullability/Task)
[INFO] [stderr]     Checking task_copy_trait v0.1.0 (/opt/rustwide/workdir/Traits/CopyTrait/Task)
[INFO] [stderr]     Checking task_enums v0.1.0 (/opt/rustwide/workdir/TicketV2/Enums/Task)
[INFO] [stderr]     Checking task_references_in_memory v0.1.0 (/opt/rustwide/workdir/TicketV1/ReferencesInMemory/Task)
[INFO] [stderr]     Checking task_saturating_arithmetic v0.1.0 (/opt/rustwide/workdir/ABasicCalculator/SaturatingArithmetic/Task)
[INFO] [stderr]     Checking task_scoped_threads v0.1.0 (/opt/rustwide/workdir/Threads/ScopedThreads/Task)
[INFO] [stderr]     Checking task_trait v0.1.0 (/opt/rustwide/workdir/Traits/Trait/Task)
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]  --> Threads/ScopedThreads/Task/src/lib.rs:5:28
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn sum(v: Vec<i32>) -> i32 {
[INFO] [stdout]   |        ---                 ^^^ expected `i32`, found `()`
[INFO] [stdout]   |        |
[INFO] [stdout]   |        implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking task_mutable_slices v0.1.0 (/opt/rustwide/workdir/TicketManagement/MutableSlices/Task)
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr]     Checking task_variables v0.1.0 (/opt/rustwide/workdir/ABasicCalculator/Variables/Task)
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]  --> Traits/CopyTrait/Task/src/lib.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct WrappingU32 {
[INFO] [stdout]   |            ----------- field in this struct
[INFO] [stdout] 4 |     value: u32,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `task_scoped_threads` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: mismatched closing delimiter: `}`
[INFO] [stdout]   --> TicketV2/Enums/Task/src/lib.rs:18:15
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl Ticket {
[INFO] [stdout]    |             - closing delimiter possibly meant for this
[INFO] [stdout] 18 |     pub fn new(title: String, description: String, status: St/* TODO */-> Ticket {
[INFO] [stdout]    |               ^ unclosed delimiter
[INFO] [stdout] ...
[INFO] [stdout] 50 | }
[INFO] [stdout]    | ^ mismatched closing delimiter
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this file contains an unclosed delimiter
[INFO] [stdout]   --> TicketV2/Enums/Task/src/lib.rs:50:3
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub enum Status {
[INFO] [stdout]    |                 - unclosed delimiter
[INFO] [stdout] ...
[INFO] [stdout] 50 | }
[INFO] [stdout]    |  ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `task_enums` (lib) due to 2 previous errors
[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" "706e4ced6931cf86b7563223863d8fde255dbc9627a8d708651ea316a001d991", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "706e4ced6931cf86b7563223863d8fde255dbc9627a8d708651ea316a001d991", kill_on_drop: false }`
[INFO] [stdout] 706e4ced6931cf86b7563223863d8fde255dbc9627a8d708651ea316a001d991
