Random texture doesn't work on water and lava

Please attach the crash report ([minecraft|http://hopper.minecraft.net/help/finding-minecraft-data-folder]/crash-reports/crash-<DATE>-client.txt), otherwise we can not diagnose this issue.
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What's a "random" texture?
Please attach the resource pack in question.

Water and lava use special rendering; their block model is not customizable, just like chests or banners for example.