[INFO] updating cached repository https://github.com/davidpeklak/rust-algorithms
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9db2d5ac0cfbfe409792033d26d8f4c8aaa3e872
[INFO] checking davidpeklak/rust-algorithms against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavidpeklak%2Frust-algorithms" "/workspace/builds/worker-9/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/davidpeklak/rust-algorithms on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/davidpeklak/rust-algorithms
[INFO] finished tweaking git repo https://github.com/davidpeklak/rust-algorithms
[INFO] tweaked toml for git repo https://github.com/davidpeklak/rust-algorithms written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/davidpeklak/rust-algorithms already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 63c4ca8340ba232b488fc9735e536d3c7082cb895d3efd5f317c6db22d83da01
[INFO] running `"docker" "start" "-a" "63c4ca8340ba232b488fc9735e536d3c7082cb895d3efd5f317c6db22d83da01"`
[INFO] [stderr]    Compiling num-traits v0.2.4
[INFO] [stderr]    Compiling num-integer v0.1.38
[INFO] [stderr]     Checking libc v0.2.41
[INFO] [stderr]     Checking rand_core v0.2.0
[INFO] [stderr]     Checking rand v0.4.2
[INFO] [stderr]     Checking rand v0.5.0
[INFO] [stderr]     Checking num-complex v0.1.43
[INFO] [stderr]     Checking num-bigint v0.1.44
[INFO] [stderr]     Checking num-iter v0.1.37
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking stopwatch v0.0.7
[INFO] [stderr]     Checking algorithms v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib/linked_list.rs:29:41
[INFO] [stderr]    |
[INFO] [stderr] 29 |     fn tail<'a>(&'a self) -> Option<&'a LinkedList<Item=Self::Item>>;
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn LinkedList<Item=Self::Item>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib/linked_list.rs:36:12
[INFO] [stderr]    |
[INFO] [stderr] 36 |     l: &'a LinkedList<Item=T>
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn LinkedList<Item=T>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib/linked_list.rs:56:41
[INFO] [stderr]    |
[INFO] [stderr] 56 |     fn tail<'a>(&'a self) -> Option<&'a LinkedList<Item=T>> {
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn LinkedList<Item=T>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib/linked_list.rs:65:28
[INFO] [stderr]    |
[INFO] [stderr] 65 | impl<T> LinkedList for Box<LinkedList<Item=T>> {
[INFO] [stderr]    |                            ^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn LinkedList<Item=T>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib/linked_list.rs:72:38
[INFO] [stderr]    |
[INFO] [stderr] 72 |     fn tail<'a>(&'a self) -> Option<&LinkedList<Item=T>> {
[INFO] [stderr]    |                                      ^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn LinkedList<Item=T>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib/linked_list.rs:88:41
[INFO] [stderr]    |
[INFO] [stderr] 88 |     fn tail<'a>(&'a self) -> Option<&'a LinkedList<Item=T>> {
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn LinkedList<Item=T>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib/linked_list.rs:29:41
[INFO] [stderr]    |
[INFO] [stderr] 29 |     fn tail<'a>(&'a self) -> Option<&'a LinkedList<Item=Self::Item>>;
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn LinkedList<Item=Self::Item>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib/linked_list.rs:36:12
[INFO] [stderr]    |
[INFO] [stderr] 36 |     l: &'a LinkedList<Item=T>
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn LinkedList<Item=T>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib/linked_list.rs:56:41
[INFO] [stderr]    |
[INFO] [stderr] 56 |     fn tail<'a>(&'a self) -> Option<&'a LinkedList<Item=T>> {
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn LinkedList<Item=T>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib/linked_list.rs:65:28
[INFO] [stderr]    |
[INFO] [stderr] 65 | impl<T> LinkedList for Box<LinkedList<Item=T>> {
[INFO] [stderr]    |                            ^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn LinkedList<Item=T>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib/linked_list.rs:72:38
[INFO] [stderr]    |
[INFO] [stderr] 72 |     fn tail<'a>(&'a self) -> Option<&LinkedList<Item=T>> {
[INFO] [stderr]    |                                      ^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn LinkedList<Item=T>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib/linked_list.rs:88:41
[INFO] [stderr]    |
[INFO] [stderr] 88 |     fn tail<'a>(&'a self) -> Option<&'a LinkedList<Item=T>> {
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn LinkedList<Item=T>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib/linked_list.rs:134:34
[INFO] [stderr]     |
[INFO] [stderr] 134 |     fn some_linked_list() -> Box<LinkedList<Item=i32>> {
[INFO] [stderr]     |                                  ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn LinkedList<Item=i32>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib/linked_list.rs:153:41
[INFO] [stderr]     |
[INFO] [stderr] 153 |     fn prepend_some<'a, L>(l: L) -> Box<LinkedList<Item=i32> + 'a>
[INFO] [stderr]     |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn LinkedList<Item=i32> + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 8 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.43s
[INFO] running `"docker" "inspect" "63c4ca8340ba232b488fc9735e536d3c7082cb895d3efd5f317c6db22d83da01"`
[INFO] running `"docker" "rm" "-f" "63c4ca8340ba232b488fc9735e536d3c7082cb895d3efd5f317c6db22d83da01"`
[INFO] [stdout] 63c4ca8340ba232b488fc9735e536d3c7082cb895d3efd5f317c6db22d83da01