empty string crash

[TurkeyMan]

hlslLinker.cpp:348

outName = UsesBuiltinAttribStrings(m_Target, m_Options) ? attribString[sem] : "\0";
if ( sem == EAttrSemUnknown || outName[0] == '\0' )

This code crashes.

When UsesBuiltinAttribStrings() returns false; outName = "\0";
After that assignment, outName.length == 0.
On the next line: outName[0] == '\0'
This comparison crashes on an invalid index, outName.length == 0 so outName[0] is an invalid offset.