cleaning up

block_pool.go

@@ -333,6 +333,7 @@ out:
 					self.td = ethutil.Big0
 					self.peer = nil
 				} else {
+					if !chain.IsTDError(err) {
 						chainManager.InsertChain(bchain)
 						for _, block := range blocks {
 							self.Remove(block.Hash())
@@ -341,4 +342,5 @@ out:
 				}
 			}
 		}
+	}
 }