Preliminary Changes for Updating Cargo (#32547)

frozen-abi/src/abi_example.rs

@@ -318,7 +318,7 @@ impl<T: AbiExample> AbiExample for Box<[T]> {
 impl<T: AbiExample> AbiExample for std::marker::PhantomData<T> {
     fn example() -> Self {
         info!("AbiExample for (PhantomData<T>): {}", type_name::<Self>());
-        <std::marker::PhantomData<T>>::default()
+        std::marker::PhantomData::<T>
     }
 }
 

net-utils/src/lib.rs

@@ -620,7 +620,7 @@ mod tests {
         let address = IpAddr::from([
             525u16, 524u16, 523u16, 522u16, 521u16, 520u16, 519u16, 518u16,
         ]);
-        let mut data = vec![0u8; IP_ECHO_SERVER_RESPONSE_LENGTH];
+        let mut data = [0u8; IP_ECHO_SERVER_RESPONSE_LENGTH];
         bincode::serialize_into(&mut data[HEADER_LENGTH..], &address).unwrap();
         let response: Result<IpEchoServerResponse, _> =
             bincode::deserialize(&data[HEADER_LENGTH..]);

program-runtime/src/loaded_programs.rs

@@ -857,8 +857,8 @@ mod tests {
         let mut cache = LoadedPrograms::default();
 
         let program1 = Pubkey::new_unique();
-        let program1_deployment_slots = vec![0, 10, 20];
+        let program1_deployment_slots = [0, 10, 20];
-        let program1_usage_counters = vec![4, 5, 25];
+        let program1_usage_counters = [4, 5, 25];
         program1_deployment_slots
             .iter()
             .enumerate()
@@ -891,8 +891,8 @@ mod tests {
         }
 
         let program2 = Pubkey::new_unique();
-        let program2_deployment_slots = vec![5, 11];
+        let program2_deployment_slots = [5, 11];
-        let program2_usage_counters = vec![0, 2];
+        let program2_usage_counters = [0, 2];
         program2_deployment_slots
             .iter()
             .enumerate()
@@ -924,8 +924,8 @@ mod tests {
         }
 
         let program3 = Pubkey::new_unique();
-        let program3_deployment_slots = vec![0, 5, 15];
+        let program3_deployment_slots = [0, 5, 15];
-        let program3_usage_counters = vec![100, 3, 20];
+        let program3_usage_counters = [100, 3, 20];
         program3_deployment_slots
             .iter()
             .enumerate()

sdk/macro/src/lib.rs

@@ -426,6 +426,11 @@ pub fn derive_clone_zeroed(input: proc_macro::TokenStream) -> proc_macro::TokenS
             let name = &item_struct.ident;
             quote! {
                 impl Clone for #name {
+                    // Clippy lint `incorrect_clone_impl_on_copy_type` requires that clone
+                    // implementations on `Copy` types are simply wrappers of `Copy`.
+                    // This is not the case here, and intentionally so because we want to
+                    // guarantee zeroed padding.
+                    #[allow(clippy::incorrect_clone_impl_on_copy_type)]
                     fn clone(&self) -> Self {
                         let mut value = std::mem::MaybeUninit::<Self>::uninit();
                         unsafe {

sdk/program/src/entrypoint.rs

@@ -378,7 +378,7 @@ mod test {
     fn test_bump_allocator() {
         // alloc the entire
         {
-            let heap = vec![0u8; 128];
+            let heap = [0u8; 128];
             let allocator = BumpAllocator {
                 start: heap.as_ptr() as *const _ as usize,
                 len: heap.len(),
@@ -398,7 +398,7 @@ mod test {
         }
         // check alignment
         {
-            let heap = vec![0u8; 128];
+            let heap = [0u8; 128];
             let allocator = BumpAllocator {
                 start: heap.as_ptr() as *const _ as usize,
                 len: heap.len(),
@@ -423,7 +423,7 @@ mod test {
         }
         // alloc entire block (minus the pos ptr)
         {
-            let heap = vec![0u8; 128];
+            let heap = [0u8; 128];
             let allocator = BumpAllocator {
                 start: heap.as_ptr() as *const _ as usize,
                 len: heap.len(),

sdk/program/src/message/compiled_keys.rs

@@ -533,7 +533,7 @@ mod tests {
 
     #[test]
     fn test_try_drain_keys_found_in_lookup_table() {
-        let orig_keys = vec![
+        let orig_keys = [
             Pubkey::new_unique(),
             Pubkey::new_unique(),
             Pubkey::new_unique(),
@@ -598,7 +598,7 @@ mod tests {
 
     #[test]
     fn test_try_drain_keys_found_in_lookup_table_with_empty_table() {
-        let original_keys = vec![
+        let original_keys = [
             Pubkey::new_unique(),
             Pubkey::new_unique(),
             Pubkey::new_unique(),

sdk/program/src/sysvar/instructions.rs

@@ -92,7 +92,6 @@ pub struct BorrowedInstruction<'a> {
 #[cfg(not(target_os = "solana"))]
 bitflags! {
     struct InstructionsSysvarAccountMeta: u8 {
-        const NONE = 0b00000000;
         const IS_SIGNER = 0b00000001;
         const IS_WRITABLE = 0b00000010;
     }
@@ -126,7 +125,7 @@ fn serialize_instructions(instructions: &[BorrowedInstruction]) -> Vec<u8> {
         data[start..start + 2].copy_from_slice(&start_instruction_offset.to_le_bytes());
         append_u16(&mut data, instruction.accounts.len() as u16);
         for account_meta in &instruction.accounts {
-            let mut account_meta_flags = InstructionsSysvarAccountMeta::NONE;
+            let mut account_meta_flags = InstructionsSysvarAccountMeta::empty();
             if account_meta.is_signer {
                 account_meta_flags |= InstructionsSysvarAccountMeta::IS_SIGNER;
             }