[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 try#6284d7b4bd27983dba388146648ab844ca7d032f for pr-152971
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAPSN4%2Flearning-rust" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/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-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/APSN4/learning-rust on toolchain 6284d7b4bd27983dba388146648ab844ca7d032f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6284d7b4bd27983dba388146648ab844ca7d032f" "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" "+6284d7b4bd27983dba388146648ab844ca7d032f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+6284d7b4bd27983dba388146648ab844ca7d032f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 078bd165e9065584a004153fb71c7bbb43778c1f6e97079254e66c6adaf5320d
[INFO] running `Command { std: "docker" "start" "-a" "078bd165e9065584a004153fb71c7bbb43778c1f6e97079254e66c6adaf5320d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "078bd165e9065584a004153fb71c7bbb43778c1f6e97079254e66c6adaf5320d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "078bd165e9065584a004153fb71c7bbb43778c1f6e97079254e66c6adaf5320d", kill_on_drop: false }`
[INFO] [stdout] 078bd165e9065584a004153fb71c7bbb43778c1f6e97079254e66c6adaf5320d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+6284d7b4bd27983dba388146648ab844ca7d032f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e0df72f8c4a3263dcddc9889c6c69de4c9725ad68066a34cf713522669b5729b
[INFO] running `Command { std: "docker" "start" "-a" "e0df72f8c4a3263dcddc9889c6c69de4c9725ad68066a34cf713522669b5729b", 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 libc v0.2.175
[INFO] [stderr]    Compiling autocfg v1.5.0
[INFO] [stderr]     Checking smallvec v1.15.1
[INFO] [stderr]    Compiling serde_json v1.0.142
[INFO] [stderr]     Checking futures-task v0.3.31
[INFO] [stderr]    Compiling rustversion v1.0.22
[INFO] [stderr]     Checking futures-channel v0.3.31
[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_slices v0.1.0 (/opt/rustwide/workdir/TicketManagement/Slices/Task)
[INFO] [stderr]     Checking task_loops_for v0.1.0 (/opt/rustwide/workdir/ABasicCalculator/LoopsFor/Task)
[INFO] [stderr]     Checking task_factorial v0.1.0 (/opt/rustwide/workdir/ABasicCalculator/Factorial/Task)
[INFO] [stderr]     Checking task_loops_while v0.1.0 (/opt/rustwide/workdir/ABasicCalculator/LoopsWhile/Task)
[INFO] [stderr]     Checking task_fallibility v0.1.0 (/opt/rustwide/workdir/TicketV2/Fallibility/Task)
[INFO] [stderr]     Checking task_nullability v0.1.0 (/opt/rustwide/workdir/TicketV2/Nullability/Task)
[INFO] [stderr]     Checking task_interior_mutability v0.1.0 (/opt/rustwide/workdir/Threads/InteriorMutability/Task)
[INFO] [stdout] error: expected type, found `{`
[INFO] [stdout]   --> TicketV2/Fallibility/Task/src/lib.rs:19:82
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl Ticket {
[INFO] [stdout]    |             - while parsing this item list starting here
[INFO] [stdout] 19 |     pub fn new(title: String, description: String, status: Status) -> /* TODO */ {
[INFO] [stdout]    |                                                                                  ^ expected type
[INFO] [stdout] ...
[INFO] [stdout] 35 | }
[INFO] [stdout]    | - the item list ends here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking task_variants_with_data v0.1.0 (/opt/rustwide/workdir/TicketV2/VariantsWithData/Task)
[INFO] [stderr]     Checking futures-util v0.3.31
[INFO] [stderr]     Checking task_visibility v0.1.0 (/opt/rustwide/workdir/TicketV1/Visibility/Task)
[INFO] [stdout] error: expected type, found `}`
[INFO] [stdout]   --> Threads/InteriorMutability/Task/src/lib.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout]  7 | pub struct DropTracker<T> {
[INFO] [stdout]    |            ----------- while parsing this struct
[INFO] [stdout] ...
[INFO] [stdout] 10 | }
[INFO] [stdout]    | ^ expected type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected type, found `)`
[INFO] [stdout]   --> Threads/InteriorMutability/Task/src/lib.rs:13:45
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn new(value: T, counter: /* TODO */) -> Self {
[INFO] [stdout]    |                                             ^ expected type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking task_unwrap v0.1.0 (/opt/rustwide/workdir/TicketV2/Unwrap/Task)
[INFO] [stderr] error: could not compile `task_fallibility` (lib) due to 1 previous error
[INFO] [stdout] error[E0425]: cannot find value `counter` in this scope
[INFO] [stdout]   --> Threads/InteriorMutability/Task/src/lib.rs:14:23
[INFO] [stdout]    |
[INFO] [stdout] 14 |         Self { value, counter }
[INFO] [stdout]    |                       ^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused import: `std::cell::RefCell`
[INFO] [stdout]  --> Threads/InteriorMutability/Task/src/lib.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::cell::RefCell;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> Threads/InteriorMutability/Task/src/lib.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `m` in this scope
[INFO] [stdout]   --> TicketV2/VariantsWithData/Task/src/lib.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |         m/* TODO */    }
[INFO] [stdout]    |         ^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `task_interior_mutability` (lib) due to 3 previous errors; 2 warnings emitted
[INFO] [stderr] error: could not compile `task_variants_with_data` (lib) due to 1 previous error
[INFO] [stdout] warning: struct `Ticket` is never constructed
[INFO] [stdout]  --> TicketV1/Visibility/Task/src/lib.rs:4:23
[INFO] [stdout]   |
[INFO] [stdout] 4 |     /* TODO */ struct Ticket {
[INFO] [stdout]   |                       ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> TicketV1/Visibility/Task/src/lib.rs:11:23
[INFO] [stdout]    |
[INFO] [stdout] 10 |     impl Ticket {
[INFO] [stdout]    |     ----------- associated function in this implementation
[INFO] [stdout] 11 |         /* TODO */ fn new(title: String, description: String, status: String) -> Ticket {
[INFO] [stdout]    |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] 
[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] [stdout] error[E0308]: mismatched types
[INFO] [stdout]  --> TicketV2/Unwrap/Task/src/lib.rs:5:75
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn easy_ticket(title: String, description: String, status: Status) -> Ticket {
[INFO] [stdout]   |        -----------                                                        ^^^^^^ expected `Ticket`, found `()`
[INFO] [stdout]   |        |
[INFO] [stdout]   |        implicitly returns `()` as its body has no tail or `return` expression
[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_unwrap` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "e0df72f8c4a3263dcddc9889c6c69de4c9725ad68066a34cf713522669b5729b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0df72f8c4a3263dcddc9889c6c69de4c9725ad68066a34cf713522669b5729b", kill_on_drop: false }`
[INFO] [stdout] e0df72f8c4a3263dcddc9889c6c69de4c9725ad68066a34cf713522669b5729b