[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 master#90b65889799733f21ebdf59d96411aa531c5900a for pr-148477
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAfizullah%2Frustlings" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/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-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Afizullah/rustlings on toolchain 90b65889799733f21ebdf59d96411aa531c5900a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+90b65889799733f21ebdf59d96411aa531c5900a" "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" "+90b65889799733f21ebdf59d96411aa531c5900a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+90b65889799733f21ebdf59d96411aa531c5900a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+90b65889799733f21ebdf59d96411aa531c5900a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 54c04702fa312f4874766160446aa22390c45c82a03978aaea2516d0ba3470c4
[INFO] running `Command { std: "docker" "start" "-a" "54c04702fa312f4874766160446aa22390c45c82a03978aaea2516d0ba3470c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "54c04702fa312f4874766160446aa22390c45c82a03978aaea2516d0ba3470c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54c04702fa312f4874766160446aa22390c45c82a03978aaea2516d0ba3470c4", kill_on_drop: false }`
[INFO] [stdout] 54c04702fa312f4874766160446aa22390c45c82a03978aaea2516d0ba3470c4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+90b65889799733f21ebdf59d96411aa531c5900a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 266aff949e516d87afb03965fedcff636122710890dcfc989495e78d1a08be30
[INFO] running `Command { std: "docker" "start" "-a" "266aff949e516d87afb03965fedcff636122710890dcfc989495e78d1a08be30", 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] For more information about this error, try `rustc --explain E0106`.
[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[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] For more information about this error, try `rustc --explain E0106`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `exercises` (bin "lifetimes1") due to 1 previous error
[INFO] [stdout] error[E0277]: cannot divide `f64` by `usize`
[INFO] [stdout]  --> exercises/23_conversions/using_as.rs:8:11
[INFO] [stdout]   |
[INFO] [stdout] 8 |     total / values.len()
[INFO] [stdout]   |           ^ no implementation for `f64 / usize`
[INFO] [stdout]   |
[INFO] [stdout]   = help: the trait `Div<usize>` is not implemented for `f64`
[INFO] [stdout] help: the following other types implement trait `Div<Rhs>`
[INFO] [stdout]  --> /rustc/90b65889799733f21ebdf59d96411aa531c5900a/library/core/src/ops/arith.rs:526:1
[INFO] [stdout]   |
[INFO] [stdout]   = note: `&f64` implements `Div<f64>`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `&f64` implements `Div`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `f64` implements `Div<&f64>`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `f64` implements `Div`
[INFO] [stdout]   = note: this error originates in the macro `div_impl_float` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `exercises` (bin "using_as") due to 1 previous error
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> exercises/17_tests/tests3.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         assert_eq!(todo!(), 10); // Check width
[INFO] [stdout]    |         ^^^^^^^^^^^-------^^^^^
[INFO] [stdout]    |         |          |
[INFO] [stdout]    |         |          any code following this expression is unreachable
[INFO] [stdout]    |         unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout]    = note: this warning originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> exercises/17_tests/tests3.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         assert_eq!(todo!(), 10); // Check width
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         unreachable expression
[INFO] [stdout]    |         any code following this expression is unreachable
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> exercises/17_tests/tests3.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         assert_eq!(todo!(), 20); // Check height
[INFO] [stdout]    |         ^^^^^^^^^^^-------^^^^^
[INFO] [stdout]    |         |          |
[INFO] [stdout]    |         |          any code following this expression is unreachable
[INFO] [stdout]    |         unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> exercises/17_tests/tests3.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         assert_eq!(todo!(), 20); // Check height
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         unreachable expression
[INFO] [stdout]    |         any code following this expression is unreachable
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: can't compare `!` with `i32`
[INFO] [stdout]   --> exercises/17_tests/tests3.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         assert_eq!(todo!(), 10); // Check width
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^ no implementation for `! == i32`
[INFO] [stdout]    |
[INFO] [stdout] help: the trait `PartialEq<i32>` is not implemented for `!`
[INFO] [stdout]       but trait `PartialEq<!>` is implemented for it
[INFO] [stdout]   --> /rustc/90b65889799733f21ebdf59d96411aa531c5900a/library/core/src/cmp.rs:2051:5
[INFO] [stdout]    = help: for that trait implementation, expected `!`, found `i32`
[INFO] [stdout]    = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: can't compare `!` with `i32`
[INFO] [stdout]   --> exercises/17_tests/tests3.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         assert_eq!(todo!(), 20); // Check height
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^ no implementation for `! == i32`
[INFO] [stdout]    |
[INFO] [stdout] help: the trait `PartialEq<i32>` is not implemented for `!`
[INFO] [stdout]       but trait `PartialEq<!>` is implemented for it
[INFO] [stdout]   --> /rustc/90b65889799733f21ebdf59d96411aa531c5900a/library/core/src/cmp.rs:2051:5
[INFO] [stdout]    = help: for that trait implementation, expected `!`, found `i32`
[INFO] [stdout]    = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `exercises` (bin "tests3" test) due to 2 previous errors; 4 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "266aff949e516d87afb03965fedcff636122710890dcfc989495e78d1a08be30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "266aff949e516d87afb03965fedcff636122710890dcfc989495e78d1a08be30", kill_on_drop: false }`
[INFO] [stdout] 266aff949e516d87afb03965fedcff636122710890dcfc989495e78d1a08be30
