avoid checking negative blocks.

crates/rbuilder/src/utils/provider_factory_reopen.rs

@@ -133,21 +133,18 @@ pub fn check_provider_factory_health<DB: Database>(
     current_block_number: u64,
     provider_factory: &ProviderFactory<DB>,
 ) -> eyre::Result<()> {
-    // evm must have access to block hashed of 256 of the previous blocks
-    for i in 1u64..=256 {
+    // evm must have access to block hashes of 256 of the previous blocks
+    let blocks_to_check = current_block_number.min(256);
+    for i in 1..=blocks_to_check {
         let num = current_block_number - i;
         let hash = provider_factory.block_hash(num)?;
         if hash.is_none() {
             eyre::bail!(
                 "Missing historical block hash for block {}, current block: {}",
-                current_block_number - i,
+                num,
                 current_block_number
             );
         }
-
-        if num == 0 {
-            break;
-        }
     }
 
     Ok(())