deadlock risk in check_orphans called from txhashset_write (#3156)

chain/src/chain.rs

@@ -441,7 +441,7 @@ impl Chain {
 	}
 
 	/// Check for orphans, once a block is successfully added
-	pub fn check_orphans(&self, mut height: u64) {
+	fn check_orphans(&self, mut height: u64) {
 		let initial_height = height;
 
 		// Is there an orphan in our orphans that we can now process?
@@ -999,9 +999,6 @@ impl Chain {
 
 		debug!("txhashset_write: replaced our txhashset with the new one");
 
-		// Check for any orphan blocks and process them based on the new chain state.
-		self.check_orphans(header.height + 1);
-
 		status.on_done();
 
 		Ok(false)