[INFO] cloning repository https://github.com/Berteun/rust-toy-list
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Berteun/rust-toy-list" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBerteun%2Frust-toy-list", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBerteun%2Frust-toy-list'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8c02b9732a93b89c6528d053069dafac7f7b6bfe
[INFO] testing Berteun/rust-toy-list against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBerteun%2Frust-toy-list" "/workspace/builds/worker-36/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-36/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Berteun/rust-toy-list on toolchain a77da2d454e6caa227a85b16410b95f93495e7e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Berteun/rust-toy-list
[INFO] finished tweaking git repo https://github.com/Berteun/rust-toy-list
[INFO] tweaked toml for git repo https://github.com/Berteun/rust-toy-list written to /workspace/builds/worker-36/source/Cargo.toml
[INFO] crate git repo https://github.com/Berteun/rust-toy-list already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-36/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-36/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e6750e581c54a73ad113d051398a4d19bb1ee91b2945ba84305f0f53ba31caa4
[INFO] running `Command { std: "docker" "start" "-a" "e6750e581c54a73ad113d051398a4d19bb1ee91b2945ba84305f0f53ba31caa4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e6750e581c54a73ad113d051398a4d19bb1ee91b2945ba84305f0f53ba31caa4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6750e581c54a73ad113d051398a4d19bb1ee91b2945ba84305f0f53ba31caa4", kill_on_drop: false }`
[INFO] [stdout] e6750e581c54a73ad113d051398a4d19bb1ee91b2945ba84305f0f53ba31caa4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-36/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-36/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b066e7c7ebe35cd772f7a6a15200811566aa0dff45c77cf0c7b133b6a8ff18b5
[INFO] running `Command { std: "docker" "start" "-a" "b066e7c7ebe35cd772f7a6a15200811566aa0dff45c77cf0c7b133b6a8ff18b5", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling reverse v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: private type `Node<T>` in public interface (error E0446)
[INFO] [stdout]   --> src/list/mod.rs:65:5
[INFO] [stdout]    |
[INFO] [stdout] 65 |     pub fn first(&self) -> Option<&Node<T>>
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(private_in_public)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #34537 <https://github.com/rust-lang/rust/issues/34537>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: private type `Node<T>` in public interface (error E0446)
[INFO] [stdout]   --> src/list/mod.rs:74:5
[INFO] [stdout]    |
[INFO] [stdout] 74 |     pub fn last(&self) -> Option<&Node<T>>
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #34537 <https://github.com/rust-lang/rust/issues/34537>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/list/mod.rs:110:9
[INFO] [stdout]     |
[INFO] [stdout] 110 |         mem::replace(self, new_list);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.96s
[INFO] running `Command { std: "docker" "inspect" "b066e7c7ebe35cd772f7a6a15200811566aa0dff45c77cf0c7b133b6a8ff18b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b066e7c7ebe35cd772f7a6a15200811566aa0dff45c77cf0c7b133b6a8ff18b5", kill_on_drop: false }`
[INFO] [stdout] b066e7c7ebe35cd772f7a6a15200811566aa0dff45c77cf0c7b133b6a8ff18b5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-36/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-36/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e722d42f0c58965d4641eea76121742d176ec58ce82cf2592c5a93624d0631db
[INFO] running `Command { std: "docker" "start" "-a" "e722d42f0c58965d4641eea76121742d176ec58ce82cf2592c5a93624d0631db", kill_on_drop: false }`
[INFO] [stderr]    Compiling reverse v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: private type `Node<T>` in public interface (error E0446)
[INFO] [stdout]   --> src/list/mod.rs:65:5
[INFO] [stdout]    |
[INFO] [stdout] 65 |     pub fn first(&self) -> Option<&Node<T>>
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(private_in_public)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #34537 <https://github.com/rust-lang/rust/issues/34537>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: private type `Node<T>` in public interface (error E0446)
[INFO] [stdout]   --> src/list/mod.rs:74:5
[INFO] [stdout]    |
[INFO] [stdout] 74 |     pub fn last(&self) -> Option<&Node<T>>
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #34537 <https://github.com/rust-lang/rust/issues/34537>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/list/mod.rs:110:9
[INFO] [stdout]     |
[INFO] [stdout] 110 |         mem::replace(self, new_list);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.41s
[INFO] running `Command { std: "docker" "inspect" "e722d42f0c58965d4641eea76121742d176ec58ce82cf2592c5a93624d0631db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e722d42f0c58965d4641eea76121742d176ec58ce82cf2592c5a93624d0631db", kill_on_drop: false }`
[INFO] [stdout] e722d42f0c58965d4641eea76121742d176ec58ce82cf2592c5a93624d0631db
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-36/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-36/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 47a15bac4ce2d99a38de4cef8deb803a043a758fc1349fdc61b745cd4d0bd260
[INFO] running `Command { std: "docker" "start" "-a" "47a15bac4ce2d99a38de4cef8deb803a043a758fc1349fdc61b745cd4d0bd260", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: private type `Node<T>` in public interface (error E0446)
[INFO] [stderr]   --> src/list/mod.rs:65:5
[INFO] [stderr]    |
[INFO] [stderr] 65 |     pub fn first(&self) -> Option<&Node<T>>
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(private_in_public)]` on by default
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]    = note: for more information, see issue #34537 <https://github.com/rust-lang/rust/issues/34537>
[INFO] [stderr] 
[INFO] [stderr] warning: private type `Node<T>` in public interface (error E0446)
[INFO] [stderr]   --> src/list/mod.rs:74:5
[INFO] [stderr]    |
[INFO] [stderr] 74 |     pub fn last(&self) -> Option<&Node<T>>
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]    = note: for more information, see issue #34537 <https://github.com/rust-lang/rust/issues/34537>
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]    --> src/list/mod.rs:110:9
[INFO] [stderr]     |
[INFO] [stderr] 110 |         mem::replace(self, new_list);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr] 
[INFO] [stderr] warning: `reverse` (bin "reverse" test) generated 3 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/reverse-d075b544b32e5042)
[INFO] [stdout] 
[INFO] [stdout] running 12 tests
[INFO] [stdout] test list::create_node ... ok
[INFO] [stdout] test list::create_node_and_append ... ok
[INFO] [stdout] test list::create_node_and_prepend ... ok
[INFO] [stdout] test list::test_drop ... ok
[INFO] [stdout] test list::test_drop_singleton ... ok
[INFO] [stdout] test list::test_last ... ok
[INFO] [stdout] test list::test_last_append_prepend ... ok
[INFO] [stdout] test list::test_last_prepend ... ok
[INFO] [stdout] test list::test_last_singleton ... ok
[INFO] [stdout] test list::test_length ... ok
[INFO] [stdout] test list::test_reverse_longer ... ok
[INFO] [stdout] test list::test_reverse_singleton ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 12 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "47a15bac4ce2d99a38de4cef8deb803a043a758fc1349fdc61b745cd4d0bd260", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "47a15bac4ce2d99a38de4cef8deb803a043a758fc1349fdc61b745cd4d0bd260", kill_on_drop: false }`
[INFO] [stdout] 47a15bac4ce2d99a38de4cef8deb803a043a758fc1349fdc61b745cd4d0bd260