# HG changeset patch
# User Artem Tikhomirov <tikhomirov.artem@gmail.com>
# Date 1330956949 -3600
# Node ID 31a719b9f95e670477509a542b4dd652deadb695
# Parent  fdc1db8f7f614704cf93169cb95d145b770c3511
Provide more detailed information on erroneous file operation

diff -r fdc1db8f7f61 -r 31a719b9f95e src/org/tmatesoft/hg/internal/DataAccessProvider.java
--- a/src/org/tmatesoft/hg/internal/DataAccessProvider.java	Sat Feb 25 19:31:57 2012 +0100
+++ b/src/org/tmatesoft/hg/internal/DataAccessProvider.java	Mon Mar 05 15:15:49 2012 +0100
@@ -237,7 +237,7 @@
 		@Override
 		public void seek(int offset) throws IOException {
 			if (offset > size) {
-				throw new IllegalArgumentException();
+				throw new IllegalArgumentException(String.format("Can't seek to %d for the file of size %d (buffer start:%d)", offset, size, bufferStartInFile));
 			}
 			if (offset < bufferStartInFile + buffer.limit() && offset >= bufferStartInFile) {
 				buffer.position((int) (offset - bufferStartInFile));