fix for latest nightly by changing the FixedBitSet generic to take by…

…tes instead of bits

.gitignore

@@ -15,3 +15,5 @@ flamegraph.svg
 perf.data
 perf.data.old
 heaptrack.*
+
+rustc-ice-*

azalea-core/src/bitset.rs

@@ -126,26 +126,24 @@ impl From<Vec<u8>> for BitSet {
 
 /// A list of bits with a known fixed size.
 ///
+/// The `N` is the number of bytes reserved for the bitset. You're encouraged to
+/// use it like `FixedBitSet<{ 20_usize.div_ceil(8) }>` if you need 20 bits.
+///
+/// TODO: this should be changed back to bits once this is resolved:
+/// https://github.com/rust-lang/rust/issues/133199#issuecomment-2531645526
+///
 /// Note that this is primarily meant for fast serialization and deserialization
 /// for Minecraft, if you don't need that you should use the `fixedbitset` crate
 /// since it's approximately 20% faster (since it stores the data as usizes
-/// instead of u8s)
+/// instead of u8s).
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct FixedBitSet<const N: usize>
-where
-    [(); N.div_ceil(8)]: Sized,
-{
-    data: [u8; N.div_ceil(8)],
+pub struct FixedBitSet<const N: usize> {
+    data: [u8; N],
 }
 
-impl<const N: usize> FixedBitSet<N>
-where
-    [u8; N.div_ceil(8)]: Sized,
-{
+impl<const N: usize> FixedBitSet<N> {
     pub fn new() -> Self {
-        FixedBitSet {
-            data: [0; N.div_ceil(8)],
-        }
+        FixedBitSet { data: [0; N] }
     }
 
     #[inline]
@@ -159,24 +157,18 @@ where
     }
 }
 
-impl<const N: usize> AzaleaRead for FixedBitSet<N>
-where
-    [u8; N.div_ceil(8)]: Sized,
-{
+impl<const N: usize> AzaleaRead for FixedBitSet<N> {
     fn azalea_read(buf: &mut Cursor<&[u8]>) -> Result<Self, BufReadError> {
-        let mut data = [0; N.div_ceil(8)];
-        for item in data.iter_mut().take(N.div_ceil(8)) {
+        let mut data = [0; N];
+        for item in data.iter_mut().take(N) {
             *item = u8::azalea_read(buf)?;
         }
         Ok(FixedBitSet { data })
     }
 }
-impl<const N: usize> AzaleaWrite for FixedBitSet<N>
-where
-    [u8; N.div_ceil(8)]: Sized,
-{
+impl<const N: usize> AzaleaWrite for FixedBitSet<N> {
     fn azalea_write(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
-        for i in 0..N.div_ceil(8) {
+        for i in 0..N {
             self.data[i].azalea_write(buf)?;
         }
         Ok(())

azalea-protocol/src/common/client_information.rs

@@ -97,7 +97,7 @@ impl Default for ModelCustomization {
 
 impl AzaleaRead for ModelCustomization {
     fn azalea_read(buf: &mut std::io::Cursor<&[u8]>) -> Result<Self, azalea_buf::BufReadError> {
-        let set = FixedBitSet::<7>::azalea_read(buf)?;
+        let set = FixedBitSet::<{ 7_usize.div_ceil(8) }>::azalea_read(buf)?;
         Ok(Self {
             cape: set.index(0),
             jacket: set.index(1),
@@ -112,7 +112,7 @@ impl AzaleaRead for ModelCustomization {
 
 impl AzaleaWrite for ModelCustomization {
     fn azalea_write(&self, buf: &mut impl std::io::Write) -> Result<(), std::io::Error> {
-        let mut set = FixedBitSet::<7>::new();
+        let mut set = FixedBitSet::<{ 7_usize.div_ceil(8) }>::new();
         if self.cape {
             set.set(0);
         }

azalea-protocol/src/packets/game/c_boss_event.rs

@@ -116,7 +116,7 @@ pub struct Properties {
 
 impl AzaleaRead for Properties {
     fn azalea_read(buf: &mut Cursor<&[u8]>) -> Result<Self, BufReadError> {
-        let set = FixedBitSet::<3>::azalea_read(buf)?;
+        let set = FixedBitSet::<{ 3_usize.div_ceil(8) }>::azalea_read(buf)?;
         Ok(Self {
             darken_screen: set.index(0),
             play_music: set.index(1),
@@ -127,7 +127,7 @@ impl AzaleaRead for Properties {
 
 impl AzaleaWrite for Properties {
     fn azalea_write(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
-        let mut set = FixedBitSet::<3>::new();
+        let mut set = FixedBitSet::<{ 3_usize.div_ceil(8) }>::new();
         if self.darken_screen {
             set.set(0);
         }

azalea-protocol/src/packets/game/c_commands.rs

@@ -46,7 +46,7 @@ impl<T: PartialEq> PartialEq for BrigadierNumber<T> {
 
 impl<T: AzaleaRead> AzaleaRead for BrigadierNumber<T> {
     fn azalea_read(buf: &mut Cursor<&[u8]>) -> Result<Self, BufReadError> {
-        let flags = FixedBitSet::<2>::azalea_read(buf)?;
+        let flags = FixedBitSet::<{ 2_usize.div_ceil(8) }>::azalea_read(buf)?;
         let min = if flags.index(0) {
             Some(T::azalea_read(buf)?)
         } else {
@@ -62,7 +62,7 @@ impl<T: AzaleaRead> AzaleaRead for BrigadierNumber<T> {
 }
 impl<T: AzaleaWrite> AzaleaWrite for BrigadierNumber<T> {
     fn azalea_write(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
-        let mut flags = FixedBitSet::<2>::new();
+        let mut flags = FixedBitSet::<{ 2_usize.div_ceil(8) }>::new();
         if self.min.is_some() {
             flags.set(0);
         }
@@ -156,7 +156,7 @@ pub struct EntityParser {
 }
 impl AzaleaRead for EntityParser {
     fn azalea_read(buf: &mut Cursor<&[u8]>) -> Result<Self, BufReadError> {
-        let flags = FixedBitSet::<2>::azalea_read(buf)?;
+        let flags = FixedBitSet::<{ 2_usize.div_ceil(8) }>::azalea_read(buf)?;
         Ok(EntityParser {
             single: flags.index(0),
             players_only: flags.index(1),
@@ -165,7 +165,7 @@ impl AzaleaRead for EntityParser {
 }
 impl AzaleaWrite for EntityParser {
     fn azalea_write(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
-        let mut flags = FixedBitSet::<2>::new();
+        let mut flags = FixedBitSet::<{ 2_usize.div_ceil(8) }>::new();
         if self.single {
             flags.set(0);
         }
@@ -180,7 +180,7 @@ impl AzaleaWrite for EntityParser {
 // TODO: BrigadierNodeStub should have more stuff
 impl AzaleaRead for BrigadierNodeStub {
     fn azalea_read(buf: &mut Cursor<&[u8]>) -> Result<Self, BufReadError> {
-        let flags = FixedBitSet::<8>::azalea_read(buf)?;
+        let flags = FixedBitSet::<{ 8_usize.div_ceil(8) }>::azalea_read(buf)?;
         if flags.index(5) || flags.index(6) || flags.index(7) {
             warn!("Warning: The flags from a Brigadier node are over 31. This is probably a bug.",);
         }
@@ -239,7 +239,7 @@ impl AzaleaRead for BrigadierNodeStub {
 
 impl AzaleaWrite for BrigadierNodeStub {
     fn azalea_write(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
-        let mut flags = FixedBitSet::<4>::new();
+        let mut flags = FixedBitSet::<{ 4_usize.div_ceil(8) }>::new();
         if self.is_executable {
             flags.set(2);
         }

azalea-protocol/src/packets/game/c_player_abilities.rs

@@ -23,7 +23,7 @@ pub struct PlayerAbilitiesFlags {
 
 impl AzaleaRead for PlayerAbilitiesFlags {
     fn azalea_read(buf: &mut Cursor<&[u8]>) -> Result<Self, BufReadError> {
-        let set = FixedBitSet::<4>::azalea_read(buf)?;
+        let set = FixedBitSet::<{ 4_usize.div_ceil(8) }>::azalea_read(buf)?;
         Ok(PlayerAbilitiesFlags {
             invulnerable: set.index(0),
             flying: set.index(1),
@@ -35,7 +35,7 @@ impl AzaleaRead for PlayerAbilitiesFlags {
 
 impl AzaleaWrite for PlayerAbilitiesFlags {
     fn azalea_write(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
-        let mut set = FixedBitSet::<4>::new();
+        let mut set = FixedBitSet::<{ 4_usize.div_ceil(8) }>::new();
         if self.invulnerable {
             set.set(0);
         }

azalea-protocol/src/packets/game/c_player_info_update.rs

@@ -183,7 +183,7 @@ pub struct ActionEnumSet {
 
 impl AzaleaRead for ActionEnumSet {
     fn azalea_read(buf: &mut Cursor<&[u8]>) -> Result<Self, BufReadError> {
-        let set = FixedBitSet::<7>::azalea_read(buf)?;
+        let set = FixedBitSet::<{ 7_usize.div_ceil(8) }>::azalea_read(buf)?;
         Ok(ActionEnumSet {
             add_player: set.index(0),
             initialize_chat: set.index(1),
@@ -199,7 +199,7 @@ impl AzaleaRead for ActionEnumSet {
 
 impl AzaleaWrite for ActionEnumSet {
     fn azalea_write(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
-        let mut set = FixedBitSet::<7>::new();
+        let mut set = FixedBitSet::<{ 7_usize.div_ceil(8) }>::new();
         if self.add_player {
             set.set(0);
         }

azalea-protocol/src/packets/game/c_player_position.rs

@@ -39,7 +39,7 @@ pub struct RelativeMovements {
 impl AzaleaRead for RelativeMovements {
     fn azalea_read(buf: &mut Cursor<&[u8]>) -> Result<Self, BufReadError> {
         // yes minecraft seriously wastes that many bits, smh
-        let set = FixedBitSet::<32>::azalea_read(buf)?;
+        let set = FixedBitSet::<{ 32_usize.div_ceil(8) }>::azalea_read(buf)?;
         Ok(RelativeMovements {
             x: set.index(0),
             y: set.index(1),
@@ -56,7 +56,7 @@ impl AzaleaRead for RelativeMovements {
 
 impl AzaleaWrite for RelativeMovements {
     fn azalea_write(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
-        let mut set = FixedBitSet::<32>::new();
+        let mut set = FixedBitSet::<{ 32_usize.div_ceil(8) }>::new();
         let mut set_bit = |index: usize, value: bool| {
             if value {
                 set.set(index);

azalea-protocol/src/packets/game/c_stop_sound.rs

@@ -1,6 +1,6 @@
 use std::io::{Cursor, Write};
 
-use azalea_buf::{BufReadError, AzaleaRead, AzaleaWrite};
+use azalea_buf::{AzaleaRead, AzaleaWrite, BufReadError};
 use azalea_core::{bitset::FixedBitSet, resource_location::ResourceLocation};
 use azalea_protocol_macros::ClientboundGamePacket;
 
@@ -14,7 +14,7 @@ pub struct ClientboundStopSound {
 
 impl AzaleaRead for ClientboundStopSound {
     fn azalea_read(buf: &mut Cursor<&[u8]>) -> Result<Self, BufReadError> {
-        let set = FixedBitSet::<2>::azalea_read(buf)?;
+        let set = FixedBitSet::<{ 2_usize.div_ceil(8) }>::azalea_read(buf)?;
         let source = if set.index(0) {
             Some(SoundSource::azalea_read(buf)?)
         } else {
@@ -32,7 +32,7 @@ impl AzaleaRead for ClientboundStopSound {
 
 impl AzaleaWrite for ClientboundStopSound {
     fn azalea_write(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
-        let mut set = FixedBitSet::<2>::new();
+        let mut set = FixedBitSet::<{ 2_usize.div_ceil(8) }>::new();
         if self.source.is_some() {
             set.set(0);
         }

azalea-protocol/src/packets/game/s_chat.rs

@@ -16,5 +16,5 @@ pub struct ServerboundChat {
 pub struct LastSeenMessagesUpdate {
     #[var]
     pub messages: u32,
-    pub acknowledged: FixedBitSet<20>,
+    pub acknowledged: FixedBitSet<{ 20_usize.div_ceil(8) }>,
 }

azalea-protocol/src/packets/game/s_player_abilities.rs

@@ -13,7 +13,7 @@ pub struct ServerboundPlayerAbilities {
 
 impl AzaleaRead for ServerboundPlayerAbilities {
     fn azalea_read(buf: &mut Cursor<&[u8]>) -> Result<Self, BufReadError> {
-        let set = FixedBitSet::<2>::azalea_read(buf)?;
+        let set = FixedBitSet::<{ 2_usize.div_ceil(8) }>::azalea_read(buf)?;
         Ok(Self {
             is_flying: set.index(1),
         })
@@ -22,7 +22,7 @@ impl AzaleaRead for ServerboundPlayerAbilities {
 
 impl AzaleaWrite for ServerboundPlayerAbilities {
     fn azalea_write(&self, buf: &mut impl std::io::Write) -> Result<(), std::io::Error> {
-        let mut set = FixedBitSet::<2>::new();
+        let mut set = FixedBitSet::<{ 2_usize.div_ceil(8) }>::new();
         if self.is_flying {
             set.set(1);
         }

azalea-protocol/src/packets/game/s_player_input.rs

@@ -18,7 +18,7 @@ pub struct ServerboundPlayerInput {
 
 impl AzaleaRead for ServerboundPlayerInput {
     fn azalea_read(buf: &mut Cursor<&[u8]>) -> Result<Self, BufReadError> {
-        let set = FixedBitSet::<7>::azalea_read(buf)?;
+        let set = FixedBitSet::<{ 7_usize.div_ceil(8) }>::azalea_read(buf)?;
         Ok(Self {
             forward: set.index(0),
             backward: set.index(1),
@@ -33,7 +33,7 @@ impl AzaleaRead for ServerboundPlayerInput {
 
 impl AzaleaWrite for ServerboundPlayerInput {
     fn azalea_write(&self, buf: &mut impl std::io::Write) -> Result<(), std::io::Error> {
-        let mut set = FixedBitSet::<7>::new();
+        let mut set = FixedBitSet::<{ 7_usize.div_ceil(8) }>::new();
         if self.forward {
             set.set(0);
         }

azalea-protocol/src/packets/game/s_set_command_block.rs

@@ -30,7 +30,7 @@ impl AzaleaRead for ServerboundSetCommandBlock {
         let command = String::azalea_read(buf)?;
         let mode = Mode::azalea_read(buf)?;
 
-        let set = FixedBitSet::<3>::azalea_read(buf)?;
+        let set = FixedBitSet::<{ 3_usize.div_ceil(8) }>::azalea_read(buf)?;
         Ok(Self {
             pos,
             command,
@@ -48,7 +48,7 @@ impl AzaleaWrite for ServerboundSetCommandBlock {
         self.command.azalea_write(buf)?;
         self.mode.azalea_write(buf)?;
 
-        let mut set = FixedBitSet::<3>::new();
+        let mut set = FixedBitSet::<{ 3_usize.div_ceil(8) }>::new();
         if self.track_output {
             set.set(0);
         }

azalea-protocol/src/packets/game/s_set_structure_block.rs

@@ -71,7 +71,7 @@ pub struct Flags {
 
 impl AzaleaRead for Flags {
     fn azalea_read(buf: &mut Cursor<&[u8]>) -> Result<Self, BufReadError> {
-        let set = FixedBitSet::<3>::azalea_read(buf)?;
+        let set = FixedBitSet::<{ 3_usize.div_ceil(8) }>::azalea_read(buf)?;
         Ok(Self {
             ignore_entities: set.index(0),
             show_air: set.index(1),
@@ -82,7 +82,7 @@ impl AzaleaRead for Flags {
 
 impl AzaleaWrite for Flags {
     fn azalea_write(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
-        let mut set = FixedBitSet::<3>::new();
+        let mut set = FixedBitSet::<{ 3_usize.div_ceil(8) }>::new();
         if self.ignore_entities {
             set.set(0);
         }

azalea/src/pathfinder/world.rs

@@ -77,8 +77,8 @@ impl CachedSections {
 
 pub struct CachedSection {
     pub pos: ChunkSectionPos,
-    pub passable_bitset: FixedBitSet<4096>,
-    pub solid_bitset: FixedBitSet<4096>,
+    pub passable_bitset: FixedBitSet<{ 4096_usize.div_ceil(8) }>,
+    pub solid_bitset: FixedBitSet<{ 4096_usize.div_ceil(8) }>,
 }
 
 impl CachedWorld {
@@ -182,8 +182,8 @@ impl CachedWorld {
 
     fn calculate_bitsets_for_section(&self, section_pos: ChunkSectionPos) -> Option<CachedSection> {
         self.with_section(section_pos, |section| {
-            let mut passable_bitset = FixedBitSet::<4096>::new();
-            let mut solid_bitset = FixedBitSet::<4096>::new();
+            let mut passable_bitset = FixedBitSet::<{ 4096_usize.div_ceil(8) }>::new();
+            let mut solid_bitset = FixedBitSet::<{ 4096_usize.div_ceil(8) }>::new();
             for i in 0..4096 {
                 let block_state_id = section.get_at_index(i);
                 let block_state = BlockState::try_from(block_state_id).unwrap_or(BlockState::AIR);