[INFO] cloning repository https://github.com/Afizullah/rustlings
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Afizullah/rustlings" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAfizullah%2Frustlings", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAfizullah%2Frustlings'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 30d2d7bb7639965c03528ada24a86af0d53c7e68
[INFO] checking Afizullah/rustlings against try#87f2ecc56b5f6032b075c8934ebc77f28d57183c for pr-148190
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAfizullah%2Frustlings" "/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/Afizullah/rustlings
[INFO] finished tweaking git repo https://github.com/Afizullah/rustlings
[INFO] tweaked toml for git repo https://github.com/Afizullah/rustlings written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Afizullah/rustlings on toolchain 87f2ecc56b5f6032b075c8934ebc77f28d57183c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+87f2ecc56b5f6032b075c8934ebc77f28d57183c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+87f2ecc56b5f6032b075c8934ebc77f28d57183c" "generate-lockfile" "--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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+87f2ecc56b5f6032b075c8934ebc77f28d57183c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+87f2ecc56b5f6032b075c8934ebc77f28d57183c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] df5eb5299a021c499af85580a10c988a4967f39b439a891bd9944db50abc5211
[INFO] running `Command { std: "docker" "start" "-a" "df5eb5299a021c499af85580a10c988a4967f39b439a891bd9944db50abc5211", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "df5eb5299a021c499af85580a10c988a4967f39b439a891bd9944db50abc5211", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df5eb5299a021c499af85580a10c988a4967f39b439a891bd9944db50abc5211", kill_on_drop: false }`
[INFO] [stdout] df5eb5299a021c499af85580a10c988a4967f39b439a891bd9944db50abc5211
[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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+87f2ecc56b5f6032b075c8934ebc77f28d57183c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6f02f67e2dbf419e74e8c2af6a30d6342b9e031e440123da05ab7e27d1054ee3
[INFO] running `Command { std: "docker" "start" "-a" "6f02f67e2dbf419e74e8c2af6a30d6342b9e031e440123da05ab7e27d1054ee3", kill_on_drop: false }`
[INFO] [stderr]     Checking exercises v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0106]: missing lifetime specifier
[INFO] [stdout]  --> exercises/16_lifetimes/lifetimes1.rs:7:33
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn longest(x: &str, y: &str) -> &str {
[INFO] [stdout]   |               ----     ----     ^ expected named lifetime parameter
[INFO] [stdout]   |
[INFO] [stdout]   = help: this function's return type contains a borrowed value, but the signature does not say whether it is borrowed from `x` or `y`
[INFO] [stdout] help: consider introducing a named lifetime parameter
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
[INFO] [stdout]   |           ++++     ++          ++          ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed for `Vec<_>`
[INFO] [stdout]   --> exercises/20_threads/threads1.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let mut results = Vec::new();
[INFO] [stdout]    |         ^^^^^^^^^^^   ---------- type must be known at this point
[INFO] [stdout]    |
[INFO] [stdout] help: consider giving `results` an explicit type, where the type for type parameter `T` is specified
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let mut results: Vec<T> = Vec::new();
[INFO] [stdout]    |                    ++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0106`.
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `my_macro` in this scope
[INFO] [stdout]   --> exercises/21_macros/macros3.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     my_macro!();
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: have you added the `#[macro_use]` on the module/import?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition: `my_macro`
[INFO] [stdout]  --> exercises/21_macros/macros3.rs:4:18
[INFO] [stdout]   |
[INFO] [stdout] 4 |     macro_rules! my_macro {
[INFO] [stdout]   |                  ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_macros)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `exercises` (bin "lifetimes1" test) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> exercises/23_conversions/from_str.rs:44:29
[INFO] [stdout]    |
[INFO] [stdout] 44 |     fn from_str(s: &str) -> Result<Self, Self::Err> {}
[INFO] [stdout]    |        --------             ^^^^^^^^^^^^^^^^^^^^^^^ expected `Result<Person, ParsePersonError>`, found `()`
[INFO] [stdout]    |        |
[INFO] [stdout]    |        implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stdout]    |
[INFO] [stdout]    = note:   expected enum `Result<Person, ParsePersonError>`
[INFO] [stdout]            found unit type `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unexpected end of macro invocation
[INFO] [stdout]   --> exercises/17_tests/tests2.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |         assert_eq!();
[INFO] [stdout]    |         ^^^^^^^^^^^^ missing tokens in macro arguments
[INFO] [stdout]    |
[INFO] [stdout] note: while trying to match meta-variable `$left:expr`
[INFO] [stdout]   --> /rustc/87f2ecc56b5f6032b075c8934ebc77f28d57183c/library/core/src/macros/mod.rs:43:5
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unexpected end of macro invocation
[INFO] [stdout]   --> exercises/17_tests/tests2.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |         assert_eq!();
[INFO] [stdout]    |         ^^^^^^^^^^^^ missing tokens in macro arguments
[INFO] [stdout]    |
[INFO] [stdout] note: while trying to match meta-variable `$left:expr`
[INFO] [stdout]   --> /rustc/87f2ecc56b5f6032b075c8934ebc77f28d57183c/library/core/src/macros/mod.rs:43:5
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unexpected end of macro invocation
[INFO] [stdout]   --> exercises/17_tests/tests2.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |         assert_eq!();
[INFO] [stdout]    |         ^^^^^^^^^^^^ missing tokens in macro arguments
[INFO] [stdout]    |
[INFO] [stdout] note: while trying to match meta-variable `$left:expr`
[INFO] [stdout]   --> /rustc/87f2ecc56b5f6032b075c8934ebc77f28d57183c/library/core/src/macros/mod.rs:43:5
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unexpected end of macro invocation
[INFO] [stdout]   --> exercises/17_tests/tests2.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |         assert_eq!();
[INFO] [stdout]    |         ^^^^^^^^^^^^ missing tokens in macro arguments
[INFO] [stdout]    |
[INFO] [stdout] note: while trying to match meta-variable `$left:expr`
[INFO] [stdout]   --> /rustc/87f2ecc56b5f6032b075c8934ebc77f28d57183c/library/core/src/macros/mod.rs:43:5
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `exercises` (bin "threads1" test) due to 1 previous error
[INFO] [stderr] error: could not compile `exercises` (bin "tests2" test) due to 4 previous errors
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `exercises` (bin "macros3" test) due to 1 previous error; 1 warning emitted
[INFO] [stderr] error: could not compile `exercises` (bin "from_str") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "6f02f67e2dbf419e74e8c2af6a30d6342b9e031e440123da05ab7e27d1054ee3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f02f67e2dbf419e74e8c2af6a30d6342b9e031e440123da05ab7e27d1054ee3", kill_on_drop: false }`
[INFO] [stdout] 6f02f67e2dbf419e74e8c2af6a30d6342b9e031e440123da05ab7e27d1054ee3
