[INFO] cloning repository https://github.com/juliob29/Rust-Doubly-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/juliob29/Rust-Doubly-Linked-List" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjuliob29%2FRust-Doubly-Linked-List", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjuliob29%2FRust-Doubly-Linked-List'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f2b03c65ec30a503bc26bdd76001aa12696e550a
[INFO] testing juliob29/Rust-Doubly-Linked-List against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjuliob29%2FRust-Doubly-Linked-List" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/juliob29/Rust-Doubly-Linked-List on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/juliob29/Rust-Doubly-Linked-List
[INFO] finished tweaking git repo https://github.com/juliob29/Rust-Doubly-Linked-List
[INFO] tweaked toml for git repo https://github.com/juliob29/Rust-Doubly-Linked-List written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/juliob29/Rust-Doubly-Linked-List already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 9583d0c0de0755b00f9996fcf2aa7dae82ff9fb1f0ae64d85f7bc9935751a397
[INFO] running `Command { std: "docker" "start" "-a" "9583d0c0de0755b00f9996fcf2aa7dae82ff9fb1f0ae64d85f7bc9935751a397", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9583d0c0de0755b00f9996fcf2aa7dae82ff9fb1f0ae64d85f7bc9935751a397", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9583d0c0de0755b00f9996fcf2aa7dae82ff9fb1f0ae64d85f7bc9935751a397", kill_on_drop: false }`
[INFO] [stdout] 9583d0c0de0755b00f9996fcf2aa7dae82ff9fb1f0ae64d85f7bc9935751a397
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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=warn" "-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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] debae1f852eaa86d8686225d24c9a349069ce9eb6045955c08078274285cecfa
[INFO] running `Command { std: "docker" "start" "-a" "debae1f852eaa86d8686225d24c9a349069ce9eb6045955c08078274285cecfa", kill_on_drop: false }`
[INFO] [stderr]    Compiling doubly-linked-list v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `fmt::Display`
[INFO] [stdout]  --> src/main.rs:6:26
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::{cell::RefCell, fmt::Display, rc::Rc}; 
[INFO] [stdout]   |                          ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:29:11
[INFO] [stdout]    |
[INFO] [stdout] 29 |       let mut new_node = Rc::new(RefCell::new(Node{
[INFO] [stdout]    |           ----^^^^^^^^
[INFO] [stdout]    |           |
[INFO] [stdout]    |           help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `printList` should have a snake case name
[INFO] [stdout]   --> src/main.rs:48:6
[INFO] [stdout]    |
[INFO] [stdout] 48 |   fn printList(&self) {
[INFO] [stdout]    |      ^^^^^^^^^ help: convert the identifier to snake case: `print_list`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `printBack` should have a snake case name
[INFO] [stdout]   --> src/main.rs:58:6
[INFO] [stdout]    |
[INFO] [stdout] 58 |   fn printBack(&self) {
[INFO] [stdout]    |      ^^^^^^^^^ help: convert the identifier to snake case: `print_back`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.84s
[INFO] running `Command { std: "docker" "inspect" "debae1f852eaa86d8686225d24c9a349069ce9eb6045955c08078274285cecfa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "debae1f852eaa86d8686225d24c9a349069ce9eb6045955c08078274285cecfa", kill_on_drop: false }`
[INFO] [stdout] debae1f852eaa86d8686225d24c9a349069ce9eb6045955c08078274285cecfa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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=warn" "-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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] becae57637d92d8854ee2cd89214678552d781d81ab69135fec9798e5df4378f
[INFO] running `Command { std: "docker" "start" "-a" "becae57637d92d8854ee2cd89214678552d781d81ab69135fec9798e5df4378f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling doubly-linked-list v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `fmt::Display`
[INFO] [stdout]  --> src/main.rs:6:26
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::{cell::RefCell, fmt::Display, rc::Rc}; 
[INFO] [stdout]   |                          ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:29:11
[INFO] [stdout]    |
[INFO] [stdout] 29 |       let mut new_node = Rc::new(RefCell::new(Node{
[INFO] [stdout]    |           ----^^^^^^^^
[INFO] [stdout]    |           |
[INFO] [stdout]    |           help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `printList` should have a snake case name
[INFO] [stdout]   --> src/main.rs:48:6
[INFO] [stdout]    |
[INFO] [stdout] 48 |   fn printList(&self) {
[INFO] [stdout]    |      ^^^^^^^^^ help: convert the identifier to snake case: `print_list`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `printBack` should have a snake case name
[INFO] [stdout]   --> src/main.rs:58:6
[INFO] [stdout]    |
[INFO] [stdout] 58 |   fn printBack(&self) {
[INFO] [stdout]    |      ^^^^^^^^^ help: convert the identifier to snake case: `print_back`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.53s
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/doubly_linked_list-b944ad798ee6c2a6)
[INFO] running `Command { std: "docker" "inspect" "becae57637d92d8854ee2cd89214678552d781d81ab69135fec9798e5df4378f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "becae57637d92d8854ee2cd89214678552d781d81ab69135fec9798e5df4378f", kill_on_drop: false }`
[INFO] [stdout] becae57637d92d8854ee2cd89214678552d781d81ab69135fec9798e5df4378f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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=warn" "-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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] bfed64e4fe30294685f0d3c0b47d807d6a81d84b865134f94e7fe7e68d47e668
[INFO] running `Command { std: "docker" "start" "-a" "bfed64e4fe30294685f0d3c0b47d807d6a81d84b865134f94e7fe7e68d47e668", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `fmt::Display`
[INFO] [stderr]  --> src/main.rs:6:26
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::{cell::RefCell, fmt::Display, rc::Rc}; 
[INFO] [stderr]   |                          ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:29:11
[INFO] [stderr]    |
[INFO] [stderr] 29 |       let mut new_node = Rc::new(RefCell::new(Node{
[INFO] [stderr]    |           ----^^^^^^^^
[INFO] [stderr]    |           |
[INFO] [stderr]    |           help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method `printList` should have a snake case name
[INFO] [stderr]   --> src/main.rs:48:6
[INFO] [stderr]    |
[INFO] [stderr] 48 |   fn printList(&self) {
[INFO] [stderr]    |      ^^^^^^^^^ help: convert the identifier to snake case: `print_list`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method `printBack` should have a snake case name
[INFO] [stderr]   --> src/main.rs:58:6
[INFO] [stderr]    |
[INFO] [stderr] 58 |   fn printBack(&self) {
[INFO] [stderr]    |      ^^^^^^^^^ help: convert the identifier to snake case: `print_back`
[INFO] [stderr] 
[INFO] [stderr] warning: `doubly-linked-list` (bin "doubly-linked-list" test) generated 4 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/doubly_linked_list-b944ad798ee6c2a6)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "bfed64e4fe30294685f0d3c0b47d807d6a81d84b865134f94e7fe7e68d47e668", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bfed64e4fe30294685f0d3c0b47d807d6a81d84b865134f94e7fe7e68d47e668", kill_on_drop: false }`
[INFO] [stdout] bfed64e4fe30294685f0d3c0b47d807d6a81d84b865134f94e7fe7e68d47e668