File extracted from DMG archive is corrupted

[crystalidea]

Hello!

What you need to reproduce

1. DMG file: http://9to5mac.com/community/mac-os-10- ... load-mega/ (torrent link is also provided)
MD5: 31ABADB83B3943E3DE88ECBF5B2F1514

2. Try extracting '\Install OS X 10.10 Developer Preview.app\Contents\SharedSupport\InstallESD.dmg' file the DMG using Altap Salamander. See that half of the extracted file is filled with zeros

3. You can use 7zip to extract the file correctly

[Ether]

I can confirm. InstallESD.dmg extracted by Salamander seems to be all NUL's starting from 0x2f3ff000. The same file extracted by 7-Zip doesn't have this problem.

Note: The dmg I downloaded has MD5 of FAA8139346873F87CA9C73C52E49E9B5, but I encountered no error during unpacking.

Inception note: OS X Yosemite 10.10 DP1.dmg (a DMG) contains InstallESD.dmg (a XAR), which contains another InstallESD.dmg (this time a DMG), that contains several pkg files (XARs), each of which contains a Payload file (that seems to be a pkg-util archive), which I can't unpack.

[crystalidea]

Ether, thanks for confirming!

[Jan Rysavy]

Thank you, we will look at this problem.

[Jan Patera]

I can confirm. InstallESD.dmg extracted by Salamander seems to be all NUL's starting from 0x2f3ff000.

Indeed, there was a problem with extracting files over 4GB from HFS+ (ISO/DMG) images. The extracted file content was clipped to modulo 4GB, leaving the rest filled with (default) zeros.
Fixed for the next release of AS.