[INFO] cloning repository https://github.com/NikitaMGrimm/rust-learning-problems
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/NikitaMGrimm/rust-learning-problems" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNikitaMGrimm%2Frust-learning-problems", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNikitaMGrimm%2Frust-learning-problems'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] aeefb4a9812508da36585c152c3a5a2fbbd38763
[INFO] checking NikitaMGrimm/rust-learning-problems against master#af4a5a13a15fa0c60e06321077ef452f769b42fd for pr-122960-4
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNikitaMGrimm%2Frust-learning-problems" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/NikitaMGrimm/rust-learning-problems on toolchain af4a5a13a15fa0c60e06321077ef452f769b42fd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/NikitaMGrimm/rust-learning-problems
[INFO] finished tweaking git repo https://github.com/NikitaMGrimm/rust-learning-problems
[INFO] tweaked toml for git repo https://github.com/NikitaMGrimm/rust-learning-problems written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/NikitaMGrimm/rust-learning-problems 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" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3722192bc672507c8820b7597414978284614ce5500bb3a02f5f75f73e24e978
[INFO] running `Command { std: "docker" "start" "-a" "3722192bc672507c8820b7597414978284614ce5500bb3a02f5f75f73e24e978", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3722192bc672507c8820b7597414978284614ce5500bb3a02f5f75f73e24e978", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3722192bc672507c8820b7597414978284614ce5500bb3a02f5f75f73e24e978", kill_on_drop: false }`
[INFO] [stdout] 3722192bc672507c8820b7597414978284614ce5500bb3a02f5f75f73e24e978
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=allow" "-e" "RUSTDOCFLAGS=--cap-lints=allow" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3693ff2b0960c3e02c424f0ee0e9b1209217e68d779896f0dd0dd25f1db401ef
[INFO] running `Command { std: "docker" "start" "-a" "3693ff2b0960c3e02c424f0ee0e9b1209217e68d779896f0dd0dd25f1db401ef", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]     Checking hello_multithread v0.1.0 (/opt/rustwide/workdir/RustBook/hello_multithread)
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking progress_bar v0.1.0 (/opt/rustwide/workdir/RustBook/progress_bar)
[INFO] [stderr]     Checking blog_testing_oop_rusty v0.1.0 (/opt/rustwide/workdir/RustBook/blog_testing_oop_rusty)
[INFO] [stderr]     Checking blog_testing_oop v0.1.0 (/opt/rustwide/workdir/RustBook/blog_testing_oop)
[INFO] [stderr]     Checking minigrep v0.1.0 (/opt/rustwide/workdir/RustBook/minigrep)
[INFO] [stderr]     Checking adder v0.1.0 (/opt/rustwide/workdir/RustBook/adder)
[INFO] [stderr]     Checking structs_testing v0.1.0 (/opt/rustwide/workdir/RustBook/structs_testing)
[INFO] [stderr]     Checking sort_and_star v0.1.0 (/opt/rustwide/workdir/Codewars/8kyu/sort_and_star)
[INFO] [stderr]     Checking fibonacci_generator v0.1.0 (/opt/rustwide/workdir/RustBook/fibonacci_generator)
[INFO] [stderr]     Checking mystery_identity v0.1.0 (/opt/rustwide/workdir/RustBook/mystery_identity)
[INFO] [stderr]     Checking string_slices v0.1.0 (/opt/rustwide/workdir/RustBook/string_slices)
[INFO] [stderr]     Checking fahrenheit_to_celsius v0.1.0 (/opt/rustwide/workdir/RustBook/fahrenheit_to_celsius)
[INFO] [stdout] error[E0599]: no method named `clone` found for type parameter `T` in the current scope
[INFO] [stdout]  --> RustBook/mystery_identity/src/main.rs:2:21
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn mystery<T>(x0: T) -> T {
[INFO] [stdout]   |            - method `clone` not found for this type parameter
[INFO] [stdout] 2 |     let mut x1 = x0.clone();
[INFO] [stdout]   |                     ^^^^^ method not found in `T`
[INFO] [stdout]   |
[INFO] [stdout]   = help: items from traits can only be used if the type parameter is bounded by the trait
[INFO] [stdout] help: the following trait defines an item `clone`, perhaps you need to restrict type parameter `T` with it:
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn mystery<T: Clone>(x0: T) -> T {
[INFO] [stdout]   |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking threadpool_testing v0.1.0 (/opt/rustwide/workdir/RustBook/threadpool_testing)
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mystery_identity` (bin "mystery_identity" test) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "3693ff2b0960c3e02c424f0ee0e9b1209217e68d779896f0dd0dd25f1db401ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3693ff2b0960c3e02c424f0ee0e9b1209217e68d779896f0dd0dd25f1db401ef", kill_on_drop: false }`
[INFO] [stdout] 3693ff2b0960c3e02c424f0ee0e9b1209217e68d779896f0dd0dd25f1db401ef