[INFO] cloning repository https://github.com/ritikmishra/iliketherusttypesystem
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ritikmishra/iliketherusttypesystem" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fritikmishra%2Filiketherusttypesystem", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fritikmishra%2Filiketherusttypesystem'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 72896a14c1ed0192b404d834e2d3d137e0f888f3
[INFO] testing ritikmishra/iliketherusttypesystem against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fritikmishra%2Filiketherusttypesystem" "/workspace/builds/worker-70/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-70/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ritikmishra/iliketherusttypesystem 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/ritikmishra/iliketherusttypesystem
[INFO] finished tweaking git repo https://github.com/ritikmishra/iliketherusttypesystem
[INFO] tweaked toml for git repo https://github.com/ritikmishra/iliketherusttypesystem written to /workspace/builds/worker-70/source/Cargo.toml
[INFO] crate git repo https://github.com/ritikmishra/iliketherusttypesystem 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-70/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-70/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] 1daa0847c42cadbb3e2cb60e0fe9ddcca6a34718bbcb76c6486cbdf9d1f40f6c
[INFO] running `Command { std: "docker" "start" "-a" "1daa0847c42cadbb3e2cb60e0fe9ddcca6a34718bbcb76c6486cbdf9d1f40f6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1daa0847c42cadbb3e2cb60e0fe9ddcca6a34718bbcb76c6486cbdf9d1f40f6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1daa0847c42cadbb3e2cb60e0fe9ddcca6a34718bbcb76c6486cbdf9d1f40f6c", kill_on_drop: false }`
[INFO] [stdout] 1daa0847c42cadbb3e2cb60e0fe9ddcca6a34718bbcb76c6486cbdf9d1f40f6c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-70/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-70/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] f35ae4df6ea2c438a3df82f28f173eab3deee2ab2732354ee7165d7716a7a543
[INFO] running `Command { std: "docker" "start" "-a" "f35ae4df6ea2c438a3df82f28f173eab3deee2ab2732354ee7165d7716a7a543", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling type_system_nqueens v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `N2`, `N5`
[INFO] [stdout]  --> src/nqueens.rs:3:160
[INFO] [stdout]   |
[INFO] [stdout] 3 | ...tMap}, lists::{Cons, List, Nil, StrRepr}, numbers::{N0, N1, N2, N3, N4, N5, N8, Number, PeanoAbsDiff, PeanoEqual, PeanoLT, Range, Succ...
[INFO] [stdout]   |                                                                ^^          ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: private trait `Items` in public interface (error E0445)
[INFO] [stdout]   --> src/lists.rs:36:1
[INFO] [stdout]    |
[INFO] [stdout] 36 | / impl<I, R> StrRepr for Cons<I, R> where Cons<I, R>: Items {
[INFO] [stdout] 37 | |     fn str_repr() -> String {
[INFO] [stdout] 38 | |         format!("[{}]", Self::items().join(", "))
[INFO] [stdout] 39 | |     }
[INFO] [stdout] 40 | | }
[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: function is never used: `threatens_type_test`
[INFO] [stdout]   --> src/nqueens.rs:35:4
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn threatens_type_test() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_prepend`
[INFO] [stdout]    --> src/nqueens.rs:101:4
[INFO] [stdout]     |
[INFO] [stdout] 101 | fn test_prepend() {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_add_queen`
[INFO] [stdout]    --> src/nqueens.rs:121:4
[INFO] [stdout]     |
[INFO] [stdout] 121 | fn test_add_queen() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_add_queen2`
[INFO] [stdout]    --> src/nqueens.rs:132:4
[INFO] [stdout]     |
[INFO] [stdout] 132 | fn test_add_queen2() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_add_queen_to_all`
[INFO] [stdout]    --> src/nqueens.rs:154:4
[INFO] [stdout]     |
[INFO] [stdout] 154 | fn test_add_queen_to_all() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `N6`
[INFO] [stdout]   --> src/numbers.rs:32:1
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub type N6 = Successor<N5>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `N7`
[INFO] [stdout]   --> src/numbers.rs:33:1
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub type N7 = Successor<N6>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `N8`
[INFO] [stdout]   --> src/numbers.rs:34:1
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub type N8 = Successor<N7>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.41s
[INFO] running `Command { std: "docker" "inspect" "f35ae4df6ea2c438a3df82f28f173eab3deee2ab2732354ee7165d7716a7a543", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f35ae4df6ea2c438a3df82f28f173eab3deee2ab2732354ee7165d7716a7a543", kill_on_drop: false }`
[INFO] [stdout] f35ae4df6ea2c438a3df82f28f173eab3deee2ab2732354ee7165d7716a7a543
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-70/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-70/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] c9a8d194dad1baa6ad7526fdc87f7f928dcf6d2b5cf9f392f7ebef37b0d0e6b2
[INFO] running `Command { std: "docker" "start" "-a" "c9a8d194dad1baa6ad7526fdc87f7f928dcf6d2b5cf9f392f7ebef37b0d0e6b2", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling type_system_nqueens v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `N2`, `N5`
[INFO] [stdout]  --> src/nqueens.rs:3:160
[INFO] [stdout]   |
[INFO] [stdout] 3 | ...tMap}, lists::{Cons, List, Nil, StrRepr}, numbers::{N0, N1, N2, N3, N4, N5, N8, Number, PeanoAbsDiff, PeanoEqual, PeanoLT, Range, Succ...
[INFO] [stdout]   |                                                                ^^          ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: private trait `Items` in public interface (error E0445)
[INFO] [stdout]   --> src/lists.rs:36:1
[INFO] [stdout]    |
[INFO] [stdout] 36 | / impl<I, R> StrRepr for Cons<I, R> where Cons<I, R>: Items {
[INFO] [stdout] 37 | |     fn str_repr() -> String {
[INFO] [stdout] 38 | |         format!("[{}]", Self::items().join(", "))
[INFO] [stdout] 39 | |     }
[INFO] [stdout] 40 | | }
[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: function is never used: `threatens_type_test`
[INFO] [stdout]   --> src/nqueens.rs:35:4
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn threatens_type_test() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_prepend`
[INFO] [stdout]    --> src/nqueens.rs:101:4
[INFO] [stdout]     |
[INFO] [stdout] 101 | fn test_prepend() {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_add_queen`
[INFO] [stdout]    --> src/nqueens.rs:121:4
[INFO] [stdout]     |
[INFO] [stdout] 121 | fn test_add_queen() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_add_queen2`
[INFO] [stdout]    --> src/nqueens.rs:132:4
[INFO] [stdout]     |
[INFO] [stdout] 132 | fn test_add_queen2() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_add_queen_to_all`
[INFO] [stdout]    --> src/nqueens.rs:154:4
[INFO] [stdout]     |
[INFO] [stdout] 154 | fn test_add_queen_to_all() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `N6`
[INFO] [stdout]   --> src/numbers.rs:32:1
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub type N6 = Successor<N5>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `N7`
[INFO] [stdout]   --> src/numbers.rs:33:1
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub type N7 = Successor<N6>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `N8`
[INFO] [stdout]   --> src/numbers.rs:34:1
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub type N8 = Successor<N7>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.12s
[INFO] running `Command { std: "docker" "inspect" "c9a8d194dad1baa6ad7526fdc87f7f928dcf6d2b5cf9f392f7ebef37b0d0e6b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9a8d194dad1baa6ad7526fdc87f7f928dcf6d2b5cf9f392f7ebef37b0d0e6b2", kill_on_drop: false }`
[INFO] [stdout] c9a8d194dad1baa6ad7526fdc87f7f928dcf6d2b5cf9f392f7ebef37b0d0e6b2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-70/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-70/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] 08a9f245626baa435303fe4f63f6bcd125f5e809977db3b4369a285ded394bac
[INFO] running `Command { std: "docker" "start" "-a" "08a9f245626baa435303fe4f63f6bcd125f5e809977db3b4369a285ded394bac", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: unused imports: `N2`, `N5`
[INFO] [stdout] running 0 tests
[INFO] [stderr]  --> src/nqueens.rs:3:160
[INFO] [stdout] 
[INFO] [stderr]   |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 3 | ...tMap}, lists::{Cons, List, Nil, StrRepr}, numbers::{N0, N1, N2, N3, N4, N5, N8, Number, PeanoAbsDiff, PeanoEqual, PeanoLT, Range, Succ...
[INFO] [stdout] 
[INFO] [stderr]   |                                                                ^^          ^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: private trait `Items` in public interface (error E0445)
[INFO] [stderr]   --> src/lists.rs:36:1
[INFO] [stderr]    |
[INFO] [stderr] 36 | / impl<I, R> StrRepr for Cons<I, R> where Cons<I, R>: Items {
[INFO] [stderr] 37 | |     fn str_repr() -> String {
[INFO] [stderr] 38 | |         format!("[{}]", Self::items().join(", "))
[INFO] [stderr] 39 | |     }
[INFO] [stderr] 40 | | }
[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: function is never used: `threatens_type_test`
[INFO] [stderr]   --> src/nqueens.rs:35:4
[INFO] [stderr]    |
[INFO] [stderr] 35 | fn threatens_type_test() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_prepend`
[INFO] [stderr]    --> src/nqueens.rs:101:4
[INFO] [stderr]     |
[INFO] [stderr] 101 | fn test_prepend() {
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_add_queen`
[INFO] [stderr]    --> src/nqueens.rs:121:4
[INFO] [stderr]     |
[INFO] [stderr] 121 | fn test_add_queen() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_add_queen2`
[INFO] [stderr]    --> src/nqueens.rs:132:4
[INFO] [stderr]     |
[INFO] [stderr] 132 | fn test_add_queen2() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_add_queen_to_all`
[INFO] [stderr]    --> src/nqueens.rs:154:4
[INFO] [stderr]     |
[INFO] [stderr] 154 | fn test_add_queen_to_all() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `N6`
[INFO] [stderr]   --> src/numbers.rs:32:1
[INFO] [stderr]    |
[INFO] [stderr] 32 | pub type N6 = Successor<N5>;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `N7`
[INFO] [stderr]   --> src/numbers.rs:33:1
[INFO] [stderr]    |
[INFO] [stderr] 33 | pub type N7 = Successor<N6>;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `N8`
[INFO] [stderr]   --> src/numbers.rs:34:1
[INFO] [stderr]    |
[INFO] [stderr] 34 | pub type N8 = Successor<N7>;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `type_system_nqueens` (bin "type_system_nqueens" test) generated 10 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.10s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/type_system_nqueens-a7ba0ac92f47fc6d)
[INFO] running `Command { std: "docker" "inspect" "08a9f245626baa435303fe4f63f6bcd125f5e809977db3b4369a285ded394bac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08a9f245626baa435303fe4f63f6bcd125f5e809977db3b4369a285ded394bac", kill_on_drop: false }`
[INFO] [stdout] 08a9f245626baa435303fe4f63f6bcd125f5e809977db3b4369a285ded394bac