fixed panic when io is not available for export block, closes #7486 (#…

…7495)
openethereum · Jan 8, 2018 · 7316cb9 · 7316cb9
1 parent 33b8f28
commit 7316cb9
Showing 1 changed file with 6 additions and 2 deletions.
diff --git a/parity/blockchain.rs b/parity/blockchain.rs
@@ -591,8 +591,12 @@ fn execute_export(cmd: ExportBlockchain) -> Result<(), String> {
 		}
 		let b = client.block(BlockId::Number(i)).ok_or("Error exporting incomplete chain")?.into_inner();
 		match format {
-			DataFormat::Binary => { out.write(&b).expect("Couldn't write to stream."); }
-			DataFormat::Hex => { out.write_fmt(format_args!("{}", b.pretty())).expect("Couldn't write to stream."); }
+			DataFormat::Binary => {
+				out.write(&b).map_err(|e| format!("Couldn't write to stream. Cause: {}", e))?;
+			}
+			DataFormat::Hex => {
+				out.write_fmt(format_args!("{}", b.pretty())).map_err(|e| format!("Couldn't write to stream. Cause: {}", e))?;
+			}
 		}
 	}