[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] checking ritikmishra/iliketherusttypesystem against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fritikmishra%2Filiketherusttypesystem" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ritikmishra/iliketherusttypesystem on toolchain a7a572ce3edd6d476191fbfe92c9c1986e009b34
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "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-0/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" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 581b3c53c4af2053a8baa17d72f59dc1d42f1881e5a66822e0266127a46f8f9e
[INFO] running `Command { std: "docker" "start" "-a" "581b3c53c4af2053a8baa17d72f59dc1d42f1881e5a66822e0266127a46f8f9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "581b3c53c4af2053a8baa17d72f59dc1d42f1881e5a66822e0266127a46f8f9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "581b3c53c4af2053a8baa17d72f59dc1d42f1881e5a66822e0266127a46f8f9e", kill_on_drop: false }`
[INFO] [stdout] 581b3c53c4af2053a8baa17d72f59dc1d42f1881e5a66822e0266127a46f8f9e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cad0636b887f8694ee8b2bc77bf25c98ec65625f55c237ef7566af220a8d678f
[INFO] running `Command { std: "docker" "start" "-a" "cad0636b887f8694ee8b2bc77bf25c98ec65625f55c237ef7566af220a8d678f", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr]     Checking type_system_nqueens v0.1.0 (/tmp/fixit)
[INFO] [stderr]    Migrating src/main.rs from 2018 edition to 2021
[INFO] [stderr]        Fixed src/nqueens.rs (1 fix)
[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: 9 warnings emitted
[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: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.65s
[INFO] [stderr] Running `cargo check` to verify 2021
[INFO] [stderr]     Checking type_system_nqueens v0.1.0 (/tmp/fixit)
[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: 9 warnings emitted
[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: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.71s
[INFO] running `Command { std: "docker" "inspect" "cad0636b887f8694ee8b2bc77bf25c98ec65625f55c237ef7566af220a8d678f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cad0636b887f8694ee8b2bc77bf25c98ec65625f55c237ef7566af220a8d678f", kill_on_drop: false }`
[INFO] [stdout] cad0636b887f8694ee8b2bc77bf25c98ec65625f55c237ef7566af220a8d678f