Reading a file in writable mode will return bogus value and delete content of file

[ricowind]

What will reproduce the issue:

void main() {
  File file = new File("testing.tmp");
  if (!file.existsSync()) {
    file.createSync();
  }

  RandomAccessFile fs = file.openSync(true);
  for (int i = 0; i < 10; i++) {
    fs.writeByteSync(i);
  }
  fs.closeSync();

  fs = file.openSync(true);
  for (int i = 0; i < 10; i++) {
    print(fs.readByteSync());
  }
  fs.closeSync();
}

Expected output:
Writes out the numbers 0,1,2..,9

Actual output:
Writes out 8,8,8..,8

Changing the parameter of the second file.openSync call to false fixes the issue and writes out the numbers.

[ricowind]

Actually, this is the currently intended approach, but being changed with this cl:
http://codereview.chromium.org/9034005/

The return value is a bit strange though (backspace)

[madsager]

cc @sgjesse.
Set owner to @madsager.
Added Started label.

[sgjesse]

http://codereview.chromium.org/9072003 should fix the wrong return value.

[madsager]

The change to allow opening files for appending has landed too. Closing.

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Added Fixed label.