[INFO] fetching crate amaze 0.1.1...
[INFO] testing amaze-0.1.1 against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-7
[INFO] extracting crate amaze 0.1.1 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate amaze 0.1.1
[INFO] finished tweaking crates.io crate amaze 0.1.1
[INFO] tweaked toml for crates.io crate amaze 0.1.1 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate amaze 0.1.1 on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 16 packages to latest compatible versions
[INFO] [stderr]       Adding rand v0.8.5 (available: v0.9.2)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded indoc v2.0.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 92db6fd87006a18c36fa4213cda564ff59c85eedd1267cc7706f5b7ddb2af074
[INFO] running `Command { std: "docker" "start" "-a" "92db6fd87006a18c36fa4213cda564ff59c85eedd1267cc7706f5b7ddb2af074", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "92db6fd87006a18c36fa4213cda564ff59c85eedd1267cc7706f5b7ddb2af074", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92db6fd87006a18c36fa4213cda564ff59c85eedd1267cc7706f5b7ddb2af074", kill_on_drop: false }`
[INFO] [stdout] 92db6fd87006a18c36fa4213cda564ff59c85eedd1267cc7706f5b7ddb2af074
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 85c2ec2db84e595f2db20907e1f585766ae87c3bf106c5beaf5eeefdcb0fb5c9
[INFO] running `Command { std: "docker" "start" "-a" "85c2ec2db84e595f2db20907e1f585766ae87c3bf106c5beaf5eeefdcb0fb5c9", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.177
[INFO] [stderr]    Compiling getrandom v0.2.16
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling amaze v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `Room4` is never constructed
[INFO] [stdout]   --> src/room4.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Room4<Tag = ()> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/room4.rs:22:19
[INFO] [stdout]     |
[INFO] [stdout]  21 | impl<Tag> Room4<Tag> {
[INFO] [stdout]     | -------------------- associated items in this implementation
[INFO] [stdout]  22 |     pub(crate) fn new_empty(index: RoomIndex, tag: Tag) -> Self {
[INFO] [stdout]     |                   ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  33 |     pub fn set_room(&mut self, direction: Direction4, room: Option<RoomIndex>) {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  43 |     pub fn set_north<R: Into<Option<RoomIndex>>>(&mut self, room: R) {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  47 |     pub fn set_south<R: Into<Option<RoomIndex>>>(&mut self, room: R) {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  51 |     pub fn set_east<R: Into<Option<RoomIndex>>>(&mut self, room: R) {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  55 |     pub fn set_west<R: Into<Option<RoomIndex>>>(&mut self, room: R) {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  59 |     pub fn north(&self) -> Option<RoomIndex> {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  63 |     pub fn east(&self) -> Option<RoomIndex> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout]  67 |     pub fn south(&self) -> Option<RoomIndex> {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  71 |     pub fn west(&self) -> Option<RoomIndex> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout]  75 |     pub fn has_neighbor(&mut self, direction: Direction4) -> bool {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  79 |     pub fn has_neighbors(&mut self) -> bool {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  83 |     pub fn get_neighbor(&mut self, direction: Direction4) -> Option<RoomIndex> {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  93 |     pub fn doors(&self) -> Door4 {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 111 |     pub fn walls(&self) -> Wall4 {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 116 |     pub fn index(&self) -> RoomIndex {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ensure_index_matches_and_apply` is never used
[INFO] [stdout]    --> src/room4.rs:121:4
[INFO] [stdout]     |
[INFO] [stdout] 121 | fn ensure_index_matches_and_apply(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `RoomIndex` is never constructed
[INFO] [stdout]  --> src/room4_list.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct RoomIndex(NonZeroUsize);
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Room4List` is never constructed
[INFO] [stdout]   --> src/room4_list.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Room4List<Tag = ()> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `EnsureIndexConsistency` is never used
[INFO] [stdout]   --> src/room4_list.rs:15:18
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub(crate) trait EnsureIndexConsistency<Tag> {
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `push_default`, `push_new`, `len`, `is_empty`, `get`, and `get_mut` are never used
[INFO] [stdout]   --> src/room4_list.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 20 | impl<Tag> Room4List<Tag> {
[INFO] [stdout]    | ------------------------ methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 28 |     pub fn push_default(&mut self, tag: Tag) -> RoomIndex {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 43 |     pub fn push_new<F>(&mut self, tag: Tag, f: F) -> RoomIndex
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 65 |     pub fn len(&self) -> usize {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 70 |     pub fn is_empty(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 74 |     pub fn get(&self, index: RoomIndex) -> Option<&Room4<Tag>> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 79 |     pub fn get_mut(&mut self, index: RoomIndex) -> Option<&mut Room4<Tag>> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `from` is never used
[INFO] [stdout]    --> src/room4_list.rs:116:12
[INFO] [stdout]     |
[INFO] [stdout] 115 | impl RoomIndex {
[INFO] [stdout]     | -------------- associated function in this implementation
[INFO] [stdout] 116 |     pub fn from(value: usize) -> Option<RoomIndex> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Room4ListIntoIterator` is never constructed
[INFO] [stdout]    --> src/room4_list.rs:144:12
[INFO] [stdout]     |
[INFO] [stdout] 144 | pub struct Room4ListIntoIterator<Tag> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_mut` is never used
[INFO] [stdout]   --> src/visit_map_2d.rs:34:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl VisitMap2D {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 34 |     pub fn get_mut(&mut self, coords: GridCoord2D) -> Option<&mut bool> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.53s
[INFO] running `Command { std: "docker" "inspect" "85c2ec2db84e595f2db20907e1f585766ae87c3bf106c5beaf5eeefdcb0fb5c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "85c2ec2db84e595f2db20907e1f585766ae87c3bf106c5beaf5eeefdcb0fb5c9", kill_on_drop: false }`
[INFO] [stdout] 85c2ec2db84e595f2db20907e1f585766ae87c3bf106c5beaf5eeefdcb0fb5c9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8c63bb5479981987946b10181f5b98a556105daff91465655c696d328ca62e2a
[INFO] running `Command { std: "docker" "start" "-a" "8c63bb5479981987946b10181f5b98a556105daff91465655c696d328ca62e2a", kill_on_drop: false }`
[INFO] [stdout] warning: struct `Room4` is never constructed
[INFO] [stdout]   --> src/room4.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Room4<Tag = ()> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/room4.rs:22:19
[INFO] [stdout]     |
[INFO] [stdout]  21 | impl<Tag> Room4<Tag> {
[INFO] [stdout]     | -------------------- associated items in this implementation
[INFO] [stdout]  22 |     pub(crate) fn new_empty(index: RoomIndex, tag: Tag) -> Self {
[INFO] [stdout]     |                   ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  33 |     pub fn set_room(&mut self, direction: Direction4, room: Option<RoomIndex>) {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  43 |     pub fn set_north<R: Into<Option<RoomIndex>>>(&mut self, room: R) {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  47 |     pub fn set_south<R: Into<Option<RoomIndex>>>(&mut self, room: R) {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  51 |     pub fn set_east<R: Into<Option<RoomIndex>>>(&mut self, room: R) {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  55 |     pub fn set_west<R: Into<Option<RoomIndex>>>(&mut self, room: R) {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  59 |     pub fn north(&self) -> Option<RoomIndex> {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  63 |     pub fn east(&self) -> Option<RoomIndex> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout]  67 |     pub fn south(&self) -> Option<RoomIndex> {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  71 |     pub fn west(&self) -> Option<RoomIndex> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout]  75 |     pub fn has_neighbor(&mut self, direction: Direction4) -> bool {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  79 |     pub fn has_neighbors(&mut self) -> bool {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  83 |     pub fn get_neighbor(&mut self, direction: Direction4) -> Option<RoomIndex> {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  93 |     pub fn doors(&self) -> Door4 {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 111 |     pub fn walls(&self) -> Wall4 {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 116 |     pub fn index(&self) -> RoomIndex {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling indoc v2.0.7
[INFO] [stdout] warning: function `ensure_index_matches_and_apply` is never used
[INFO] [stdout]    --> src/room4.rs:121:4
[INFO] [stdout]     |
[INFO] [stdout] 121 | fn ensure_index_matches_and_apply(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `RoomIndex` is never constructed
[INFO] [stdout]  --> src/room4_list.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct RoomIndex(NonZeroUsize);
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Room4List` is never constructed
[INFO] [stdout]   --> src/room4_list.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Room4List<Tag = ()> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `EnsureIndexConsistency` is never used
[INFO] [stdout]   --> src/room4_list.rs:15:18
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub(crate) trait EnsureIndexConsistency<Tag> {
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `push_default`, `push_new`, `len`, `is_empty`, `get`, and `get_mut` are never used
[INFO] [stdout]   --> src/room4_list.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 20 | impl<Tag> Room4List<Tag> {
[INFO] [stdout]    | ------------------------ methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 28 |     pub fn push_default(&mut self, tag: Tag) -> RoomIndex {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 43 |     pub fn push_new<F>(&mut self, tag: Tag, f: F) -> RoomIndex
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 65 |     pub fn len(&self) -> usize {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 70 |     pub fn is_empty(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 74 |     pub fn get(&self, index: RoomIndex) -> Option<&Room4<Tag>> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 79 |     pub fn get_mut(&mut self, index: RoomIndex) -> Option<&mut Room4<Tag>> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `from` is never used
[INFO] [stdout]    --> src/room4_list.rs:116:12
[INFO] [stdout]     |
[INFO] [stdout] 115 | impl RoomIndex {
[INFO] [stdout]     | -------------- associated function in this implementation
[INFO] [stdout] 116 |     pub fn from(value: usize) -> Option<RoomIndex> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Room4ListIntoIterator` is never constructed
[INFO] [stdout]    --> src/room4_list.rs:144:12
[INFO] [stdout]     |
[INFO] [stdout] 144 | pub struct Room4ListIntoIterator<Tag> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_mut` is never used
[INFO] [stdout]   --> src/visit_map_2d.rs:34:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl VisitMap2D {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 34 |     pub fn get_mut(&mut self, coords: GridCoord2D) -> Option<&mut bool> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling amaze v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: methods `set_room`, `has_neighbor`, and `get_neighbor` are never used
[INFO] [stdout]   --> src/room4.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl<Tag> Room4<Tag> {
[INFO] [stdout]    | -------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 33 |     pub fn set_room(&mut self, direction: Direction4, room: Option<RoomIndex>) {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 75 |     pub fn has_neighbor(&mut self, direction: Direction4) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 83 |     pub fn get_neighbor(&mut self, direction: Direction4) -> Option<RoomIndex> {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `len` and `is_empty` are never used
[INFO] [stdout]   --> src/room4_list.rs:65:12
[INFO] [stdout]    |
[INFO] [stdout] 20 | impl<Tag> Room4List<Tag> {
[INFO] [stdout]    | ------------------------ methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 65 |     pub fn len(&self) -> usize {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 70 |     pub fn is_empty(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_mut` is never used
[INFO] [stdout]   --> src/visit_map_2d.rs:34:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl VisitMap2D {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 34 |     pub fn get_mut(&mut self, coords: GridCoord2D) -> Option<&mut bool> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.84s
[INFO] running `Command { std: "docker" "inspect" "8c63bb5479981987946b10181f5b98a556105daff91465655c696d328ca62e2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c63bb5479981987946b10181f5b98a556105daff91465655c696d328ca62e2a", kill_on_drop: false }`
[INFO] [stdout] 8c63bb5479981987946b10181f5b98a556105daff91465655c696d328ca62e2a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 4ce59279dc1a7654b3cd9ae44125f882a22915fec12b3fed964fbbc1859a3606
[INFO] running `Command { std: "docker" "start" "-a" "4ce59279dc1a7654b3cd9ae44125f882a22915fec12b3fed964fbbc1859a3606", kill_on_drop: false }`
[INFO] [stderr] warning: struct `Room4` is never constructed
[INFO] [stderr]   --> src/room4.rs:12:12
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub struct Room4<Tag = ()> {
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: multiple associated items are never used
[INFO] [stderr]    --> src/room4.rs:22:19
[INFO] [stderr]     |
[INFO] [stderr]  21 | impl<Tag> Room4<Tag> {
[INFO] [stderr]     | -------------------- associated items in this implementation
[INFO] [stderr]  22 |     pub(crate) fn new_empty(index: RoomIndex, tag: Tag) -> Self {
[INFO] [stderr]     |                   ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr]  33 |     pub fn set_room(&mut self, direction: Direction4, room: Option<RoomIndex>) {
[INFO] [stderr]     |            ^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr]  43 |     pub fn set_north<R: Into<Option<RoomIndex>>>(&mut self, room: R) {
[INFO] [stderr]     |            ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr]  47 |     pub fn set_south<R: Into<Option<RoomIndex>>>(&mut self, room: R) {
[INFO] [stderr]     |            ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr]  51 |     pub fn set_east<R: Into<Option<RoomIndex>>>(&mut self, room: R) {
[INFO] [stderr]     |            ^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr]  55 |     pub fn set_west<R: Into<Option<RoomIndex>>>(&mut self, room: R) {
[INFO] [stderr]     |            ^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr]  59 |     pub fn north(&self) -> Option<RoomIndex> {
[INFO] [stderr]     |            ^^^^^
[INFO] [stderr] ...
[INFO] [stderr]  63 |     pub fn east(&self) -> Option<RoomIndex> {
[INFO] [stderr]     |            ^^^^
[INFO] [stderr] ...
[INFO] [stderr]  67 |     pub fn south(&self) -> Option<RoomIndex> {
[INFO] [stderr]     |            ^^^^^
[INFO] [stderr] ...
[INFO] [stderr]  71 |     pub fn west(&self) -> Option<RoomIndex> {
[INFO] [stderr]     |            ^^^^
[INFO] [stderr] ...
[INFO] [stderr]  75 |     pub fn has_neighbor(&mut self, direction: Direction4) -> bool {
[INFO] [stderr]     |            ^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr]  79 |     pub fn has_neighbors(&mut self) -> bool {
[INFO] [stderr]     |            ^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr]  83 |     pub fn get_neighbor(&mut self, direction: Direction4) -> Option<RoomIndex> {
[INFO] [stderr]     |            ^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr]  93 |     pub fn doors(&self) -> Door4 {
[INFO] [stderr]     |            ^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 111 |     pub fn walls(&self) -> Wall4 {
[INFO] [stderr]     |            ^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 116 |     pub fn index(&self) -> RoomIndex {
[INFO] [stderr]     |            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `ensure_index_matches_and_apply` is never used
[INFO] [stderr]    --> src/room4.rs:121:4
[INFO] [stderr]     |
[INFO] [stderr] 121 | fn ensure_index_matches_and_apply(
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `RoomIndex` is never constructed
[INFO] [stderr]  --> src/room4_list.rs:8:12
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub struct RoomIndex(NonZeroUsize);
[INFO] [stderr]   |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Room4List` is never constructed
[INFO] [stderr]   --> src/room4_list.rs:11:12
[INFO] [stderr]    |
[INFO] [stderr] 11 | pub struct Room4List<Tag = ()> {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `EnsureIndexConsistency` is never used
[INFO] [stderr]   --> src/room4_list.rs:15:18
[INFO] [stderr]    |
[INFO] [stderr] 15 | pub(crate) trait EnsureIndexConsistency<Tag> {
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: methods `push_default`, `push_new`, `len`, `is_empty`, `get`, and `get_mut` are never used
[INFO] [stderr]   --> src/room4_list.rs:28:12
[INFO] [stderr]    |
[INFO] [stderr] 20 | impl<Tag> Room4List<Tag> {
[INFO] [stderr]    | ------------------------ methods in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 28 |     pub fn push_default(&mut self, tag: Tag) -> RoomIndex {
[INFO] [stderr]    |            ^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 43 |     pub fn push_new<F>(&mut self, tag: Tag, f: F) -> RoomIndex
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 65 |     pub fn len(&self) -> usize {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] ...
[INFO] [stderr] 70 |     pub fn is_empty(&self) -> bool {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 74 |     pub fn get(&self, index: RoomIndex) -> Option<&Room4<Tag>> {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] ...
[INFO] [stderr] 79 |     pub fn get_mut(&mut self, index: RoomIndex) -> Option<&mut Room4<Tag>> {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `from` is never used
[INFO] [stderr]    --> src/room4_list.rs:116:12
[INFO] [stderr]     |
[INFO] [stderr] 115 | impl RoomIndex {
[INFO] [stderr]     | -------------- associated function in this implementation
[INFO] [stderr] 116 |     pub fn from(value: usize) -> Option<RoomIndex> {
[INFO] [stderr]     |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Room4ListIntoIterator` is never constructed
[INFO] [stderr]    --> src/room4_list.rs:144:12
[INFO] [stderr]     |
[INFO] [stderr] 144 | pub struct Room4ListIntoIterator<Tag> {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `get_mut` is never used
[INFO] [stderr]   --> src/visit_map_2d.rs:34:12
[INFO] [stderr]    |
[INFO] [stderr] 11 | impl VisitMap2D {
[INFO] [stderr]    | --------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 34 |     pub fn get_mut(&mut self, coords: GridCoord2D) -> Option<&mut bool> {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `amaze` (lib) generated 10 warnings
[INFO] [stderr] warning: methods `set_room`, `has_neighbor`, and `get_neighbor` are never used
[INFO] [stderr]   --> src/room4.rs:33:12
[INFO] [stderr]    |
[INFO] [stderr] 21 | impl<Tag> Room4<Tag> {
[INFO] [stderr]    | -------------------- methods in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 33 |     pub fn set_room(&mut self, direction: Direction4, room: Option<RoomIndex>) {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 75 |     pub fn has_neighbor(&mut self, direction: Direction4) -> bool {
[INFO] [stderr]    |            ^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 83 |     pub fn get_neighbor(&mut self, direction: Direction4) -> Option<RoomIndex> {
[INFO] [stderr]    |            ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: methods `len` and `is_empty` are never used
[INFO] [stderr]   --> src/room4_list.rs:65:12
[INFO] [stderr]    |
[INFO] [stderr] 20 | impl<Tag> Room4List<Tag> {
[INFO] [stderr]    | ------------------------ methods in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 65 |     pub fn len(&self) -> usize {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] ...
[INFO] [stderr] 70 |     pub fn is_empty(&self) -> bool {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `amaze` (lib test) generated 3 warnings (1 duplicate)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/amaze-e35670de92118f3b)
[INFO] [stdout] 
[INFO] [stdout] running 31 tests
[INFO] [stdout] test direction4::tests::add_combines_directions ... ok
[INFO] [stdout] test direction4::tests::all_contains_all_directions ... ok
[INFO] [stdout] test direction4::tests::any_direction_is_not_none ... ok
[INFO] [stdout] test direction4::tests::all_directions_is_all ... ok
[INFO] [stdout] test direction4::tests::any_direction_is_not_all ... ok
[INFO] [stdout] test direction4::tests::add_assign_combines_directions ... ok
[INFO] [stdout] test direction4::tests::default_is_none ... ok
[INFO] [stdout] test direction4::tests::into_iter_for_combination_enumerates_contained ... ok
[INFO] [stdout] test direction4::tests::remove_removes_directions ... ok
[INFO] [stdout] test direction4::tests::sub_assign_removes_directions ... ok
[INFO] [stdout] test direction4::tests::sub_removes_directions ... ok
[INFO] [stdout] test generators::recursive_backtracker4::tests::it_works ... ok
[INFO] [stdout] test direction4::tests::into_iter_for_all_enumerates_all ... ok
[INFO] [stdout] test direction4::tests::is_trivial_work ... ok
[INFO] [stdout] test direction4::tests::debug_lists_directions ... ok
[INFO] [stdout] test direction4::tests::not_inverts_selection ... ok
[INFO] [stdout] test direction4::tests::not_all_is_none ... ok
[INFO] [stdout] test grid_coord_2d::tests::linearize_coords_correctly ... ok
[INFO] [stdout] test room4::tests::it_works ... ok
[INFO] [stdout] test renderers::unicode_renderer::tests::double_works ... ok
[INFO] [stdout] test room4::tests::empty_room_has_no_neighbors ... ok
[INFO] [stdout] test direction4::tests::include_combines_directions ... ok
[INFO] [stdout] test room4_list::tests::get_returns_some ... ok
[INFO] [stdout] test room4_list::tests::get_mut_returns_some ... ok
[INFO] [stdout] test renderers::unicode_renderer::tests::heavy_works ... ok
[INFO] [stdout] test renderers::unicode_renderer::tests::hex_works ... ok
[INFO] [stdout] test room4_list::tests::get_with_invalid_index_returns_none ... ok
[INFO] [stdout] test room4_list::tests::index_mut_returns_some ... ok
[INFO] [stdout] test renderers::unicode_renderer::tests::thin_works ... ok
[INFO] [stdout] test room4_list::tests::index_returns_some ... ok
[INFO] [stdout] test grid_coord_2d::tests::linearize_coords_out_of_bounds_panics - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 31 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.05s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests amaze
[INFO] [stdout] 
[INFO] [stdout] running 21 tests
[INFO] [stdout] test src/direction4.rs - direction4::Direction4::is_trivial (line 69) ... ok
[INFO] [stdout] test src/direction4.rs - direction4::Direction4::include (line 88) ... ok
[INFO] [stdout] test src/direction4.rs - direction4::Direction4::is_all (line 42) ... ok
[INFO] [stdout] test src/direction4.rs - direction4::Direction4::add_assign (line 168) ... ok
[INFO] [stdout] test src/direction4.rs - direction4::Direction4::add (line 153) ... ok
[INFO] [stdout] test src/direction4.rs - direction4::Direction4::is_none (line 56) ... ok
[INFO] [stdout] test src/direction4.rs - direction4::Direction4::deref (line 240) ... ok
[INFO] [stdout] test src/direction4.rs - direction4::Direction4::contains (line 27) ... ok
[INFO] [stdout] test src/direction4.rs - direction4::Direction4::not (line 223) ... ok
[INFO] [stdout] test src/direction4.rs - direction4::Direction4::join (line 126) ... ok
[INFO] [stdout] test src/renderers/pgm_renderer.rs - renderers::pgm_renderer::ImageRenderer::set_colors (line 44) ... ok
[INFO] [stdout] test src/direction4.rs - direction4::Direction4::sub (line 188) ... ok
[INFO] [stdout] test src/renderers/pgm_renderer.rs - renderers::pgm_renderer::ImageRenderer::new (line 28) ... ok
[INFO] [stdout] test src/direction4.rs - direction4::Direction4::sub_assign (line 203) ... ok
[INFO] [stdout] test src/direction4.rs - direction4::Direction4::remove (line 107) ... ok
[INFO] [stdout] test src/renderers/unicode_renderer.rs - renderers::unicode_renderer::UnicodeRenderStyle::Double (line 116) ... ok
[INFO] [stdout] test src/renderers/pgm_renderer.rs - renderers::pgm_renderer::ImageRenderer::render (line 59) ... ok
[INFO] [stdout] test src/renderers/unicode_renderer.rs - renderers::unicode_renderer::UnicodeRenderStyle::Hexadecimal (line 160) ... ok
[INFO] [stdout] test src/renderers/unicode_renderer.rs - renderers::unicode_renderer::UnicodeRenderStyle::Thin (line 94) ... ok
[INFO] [stdout] test src/renderers/unicode_renderer.rs - renderers::unicode_renderer::UnicodeRenderer::new (line 192) ... ok
[INFO] [stdout] test src/renderers/unicode_renderer.rs - renderers::unicode_renderer::UnicodeRenderStyle::Heavy (line 138) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 21 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 2.14s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "4ce59279dc1a7654b3cd9ae44125f882a22915fec12b3fed964fbbc1859a3606", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ce59279dc1a7654b3cd9ae44125f882a22915fec12b3fed964fbbc1859a3606", kill_on_drop: false }`
[INFO] [stdout] 4ce59279dc1a7654b3cd9ae44125f882a22915fec12b3fed964fbbc1859a3606
