[INFO] cloning repository https://github.com/fabienbellanger/100_Exercises_to_Learn_Rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fabienbellanger/100_Exercises_to_Learn_Rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffabienbellanger%2F100_Exercises_to_Learn_Rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffabienbellanger%2F100_Exercises_to_Learn_Rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6ad1dda9de93e37a0173b7cb9f94c9baf4b3d152
[INFO] checking fabienbellanger/100_Exercises_to_Learn_Rust against try#73ffebff6f34db7eb167bf9edcf2afa19c3073e9 for pr-147841
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffabienbellanger%2F100_Exercises_to_Learn_Rust" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/fabienbellanger/100_Exercises_to_Learn_Rust
[INFO] finished tweaking git repo https://github.com/fabienbellanger/100_Exercises_to_Learn_Rust
[INFO] tweaked toml for git repo https://github.com/fabienbellanger/100_Exercises_to_Learn_Rust written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/fabienbellanger/100_Exercises_to_Learn_Rust on toolchain 73ffebff6f34db7eb167bf9edcf2afa19c3073e9
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+73ffebff6f34db7eb167bf9edcf2afa19c3073e9" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/fabienbellanger/100_Exercises_to_Learn_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" "+73ffebff6f34db7eb167bf9edcf2afa19c3073e9" "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
[ERROR] error running command: no output for 300 seconds
[INFO] checking fabienbellanger/100_Exercises_to_Learn_Rust against try#73ffebff6f34db7eb167bf9edcf2afa19c3073e9 for pr-147841
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffabienbellanger%2F100_Exercises_to_Learn_Rust" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/fabienbellanger/100_Exercises_to_Learn_Rust
[INFO] finished tweaking git repo https://github.com/fabienbellanger/100_Exercises_to_Learn_Rust
[INFO] tweaked toml for git repo https://github.com/fabienbellanger/100_Exercises_to_Learn_Rust written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/fabienbellanger/100_Exercises_to_Learn_Rust on toolchain 73ffebff6f34db7eb167bf9edcf2afa19c3073e9
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+73ffebff6f34db7eb167bf9edcf2afa19c3073e9" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/fabienbellanger/100_Exercises_to_Learn_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" "+73ffebff6f34db7eb167bf9edcf2afa19c3073e9" "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 redox_syscall v0.5.15
[INFO] [stderr]   Downloaded escargot v0.5.14
[INFO] [stderr]   Downloaded hyper-util v0.1.15
[INFO] [stderr]   Downloaded serde_json v1.0.141
[INFO] [stderr]   Downloaded tokio v1.46.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+73ffebff6f34db7eb167bf9edcf2afa19c3073e9" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3b8eb08d0c4497221e7fc8e84657c78aeec777318d5438b2b6c03071845b3f72
[INFO] running `Command { std: "docker" "start" "-a" "3b8eb08d0c4497221e7fc8e84657c78aeec777318d5438b2b6c03071845b3f72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3b8eb08d0c4497221e7fc8e84657c78aeec777318d5438b2b6c03071845b3f72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b8eb08d0c4497221e7fc8e84657c78aeec777318d5438b2b6c03071845b3f72", kill_on_drop: false }`
[INFO] [stdout] 3b8eb08d0c4497221e7fc8e84657c78aeec777318d5438b2b6c03071845b3f72
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+73ffebff6f34db7eb167bf9edcf2afa19c3073e9" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7102df8b55baac7ae5a10069ce31ffb2a8ef0c8394e11f718f5ec6fde9b659c9
[INFO] running `Command { std: "docker" "start" "-a" "7102df8b55baac7ae5a10069ce31ffb2a8ef0c8394e11f718f5ec6fde9b659c9", kill_on_drop: false }`
[INFO] [stderr]     Checking common v0.1.0 (/opt/rustwide/workdir/helpers/common)
[INFO] [stderr]    Compiling libc v0.2.174
[INFO] [stderr]    Compiling autocfg v1.5.0
[INFO] [stderr]    Compiling parking_lot_core v0.9.11
[INFO] [stderr]     Checking cfg-if v1.0.1
[INFO] [stderr]     Checking smallvec v1.15.1
[INFO] [stderr]    Compiling serde_json v1.0.141
[INFO] [stderr]     Checking memchr v2.7.5
[INFO] [stderr]     Checking futures-task v0.3.31
[INFO] [stderr]     Checking tracing-core v0.1.34
[INFO] [stderr]    Compiling syn v2.0.104
[INFO] [stderr]    Compiling rustversion v1.0.21
[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_heap v0.1.0 (/opt/rustwide/workdir/TicketV1/Heap/Task)
[INFO] [stderr]     Checking task_nullability v0.1.0 (/opt/rustwide/workdir/TicketV2/Nullability/Task)
[INFO] [stderr]     Checking task_futures_introduction v0.1.0 (/opt/rustwide/workdir/Futures/Introduction/Futures - Introduction)
[INFO] [stderr]     Checking task_branching v0.1.0 (/opt/rustwide/workdir/ABasicCalculator/BranchingIfElse/Task)
[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] [stderr]     Checking task_branching_if_let_and_let_else v0.1.0 (/opt/rustwide/workdir/TicketV2/BranchingIfLetAndLetElse/Task)
[INFO] [stderr]     Checking task_scoped_threads v0.1.0 (/opt/rustwide/workdir/Threads/ScopedThreads/Task)
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr]     Checking task_traits_outro v0.1.0 (/opt/rustwide/workdir/Traits/Outro/Task)
[INFO] [stderr] error: could not compile `task_nullability` (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]  --> 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] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `task_scoped_threads` (lib) due to 1 previous error
[INFO] [stderr] error: could not compile `task_branching_if_let_and_let_else` (lib) due to 1 previous error
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> TicketV2/BranchingIfLetAndLetElse/Task/src/lib.rs:10:29
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn radius(&self) -> f64 {
[INFO] [stdout]    |            ------           ^^^ expected `f64`, 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] running `Command { std: "docker" "inspect" "7102df8b55baac7ae5a10069ce31ffb2a8ef0c8394e11f718f5ec6fde9b659c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7102df8b55baac7ae5a10069ce31ffb2a8ef0c8394e11f718f5ec6fde9b659c9", kill_on_drop: false }`
[INFO] [stdout] 7102df8b55baac7ae5a10069ce31ffb2a8ef0c8394e11f718f5ec6fde9b659c9