This crash bug has been fixed in build 10468.

When using the Minimap:SetBlipTexture() API, the client will crash if an empty string ("") is passed as the sole argument. I've sent in two crash dumps after replicating the problem.

File: .\Texture.cpp
Line: 3331

fileName[0]

When I use (nil) as the argument, I get a syntax error message, but the blips do not change, as expected.

<string>:"Minimap:SetBlipTexture(nil)":1: Usage: Minimap:SetBlipTexture("file")

If I provide a non-existent texture file path as an arguement ("PathToNonExistentTexture"), the minimap blips all turn into bright green squares and I get the error message:

Minimap:SetBlipTexture(): Couldn't load the file

Edit: This error occurs in build 10357.

Edit again to confirm that this crash does not happen on live servers when an empty string is passed as the argument.

I hope this means you are working on extending this API to the PartyRaidBlips texture as well. :)