[INFO] cloning repository https://github.com/Ndeta100/Rust_linked_list
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Ndeta100/Rust_linked_list" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNdeta100%2FRust_linked_list", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNdeta100%2FRust_linked_list'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b2ed288297715492e6234714a0ee59c5d3b20c48
[INFO] checking Ndeta100/Rust_linked_list against master#818811b3cd1e0ff0d8ef20d5a4cf0b7c079929bc for pr-156114-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNdeta100%2FRust_linked_list" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Ndeta100/Rust_linked_list
[INFO] finished tweaking git repo https://github.com/Ndeta100/Rust_linked_list
[INFO] tweaked toml for git repo https://github.com/Ndeta100/Rust_linked_list written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Ndeta100/Rust_linked_list on toolchain 818811b3cd1e0ff0d8ef20d5a4cf0b7c079929bc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+818811b3cd1e0ff0d8ef20d5a4cf0b7c079929bc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Ndeta100/Rust_linked_list 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" "+818811b3cd1e0ff0d8ef20d5a4cf0b7c079929bc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+818811b3cd1e0ff0d8ef20d5a4cf0b7c079929bc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c3934817aa9bc9a40849fc3bcd452f24b75485c69a92dd7865d0430d97e3f02b
[INFO] running `Command { std: "docker" "start" "-a" "c3934817aa9bc9a40849fc3bcd452f24b75485c69a92dd7865d0430d97e3f02b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c3934817aa9bc9a40849fc3bcd452f24b75485c69a92dd7865d0430d97e3f02b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3934817aa9bc9a40849fc3bcd452f24b75485c69a92dd7865d0430d97e3f02b", kill_on_drop: false }`
[INFO] [stdout] c3934817aa9bc9a40849fc3bcd452f24b75485c69a92dd7865d0430d97e3f02b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+818811b3cd1e0ff0d8ef20d5a4cf0b7c079929bc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 225bdb3d2e619625c73f00a499fe46160a4ed1689b7ee87fd68c4de5bd8f535c
[INFO] running `Command { std: "docker" "start" "-a" "225bdb3d2e619625c73f00a499fe46160a4ed1689b7ee87fd68c4de5bd8f535c", kill_on_drop: false }`
[INFO] [stderr]     Checking singly_linkedList_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `std::os::macos`
[INFO] [stdout]  --> src/lib.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::os::macos;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^ no `macos` in `os`
[INFO] [stdout]   |
[INFO] [stdout] note: found an item that was configured out
[INFO] [stdout]  --> /rustc/818811b3cd1e0ff0d8ef20d5a4cf0b7c079929bc/library/std/src/os/mod.rs:156:6
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item is gated behind the `macos` feature
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::os::macos`
[INFO] [stdout]  --> src/lib.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::os::macos;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^ no `macos` in `os`
[INFO] [stdout]   |
[INFO] [stdout] note: found an item that was configured out
[INFO] [stdout]  --> /rustc/818811b3cd1e0ff0d8ef20d5a4cf0b7c079929bc/library/std/src/os/mod.rs:156:6
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item is gated behind the `macos` feature
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/lib.rs:50:27
[INFO] [stdout]    |
[INFO] [stdout] 50 |     fn peek(&mut self) -> Option<&u32> {}
[INFO] [stdout]    |        ----               ^^^^^^^^^^^^ expected `Option<&u32>`, found `()`
[INFO] [stdout]    |        |
[INFO] [stdout]    |        implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stdout]    |
[INFO] [stdout]    = note:   expected enum `Option<&u32>`
[INFO] [stdout]            found unit type `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/lib.rs:50:27
[INFO] [stdout]    |
[INFO] [stdout] 50 |     fn peek(&mut self) -> Option<&u32> {}
[INFO] [stdout]    |        ----               ^^^^^^^^^^^^ expected `Option<&u32>`, found `()`
[INFO] [stdout]    |        |
[INFO] [stdout]    |        implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stdout]    |
[INFO] [stdout]    = note:   expected enum `Option<&u32>`
[INFO] [stdout]            found unit type `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0308, E0432.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0308, E0432.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `singly_linkedList_rust` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `singly_linkedList_rust` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "225bdb3d2e619625c73f00a499fe46160a4ed1689b7ee87fd68c4de5bd8f535c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "225bdb3d2e619625c73f00a499fe46160a4ed1689b7ee87fd68c4de5bd8f535c", kill_on_drop: false }`
[INFO] [stdout] 225bdb3d2e619625c73f00a499fe46160a4ed1689b7ee87fd68c4de5bd8f535c
