Xcode 6 beta 3: invalid virtual filesystem overlay file

Question

After updating to Xcode 6 beta 3 the compiler keeps crashing with the following error:

/[Long-path-goes-here]/all-product-headers.yaml:4:13: error: Could not         


        

Answer 1

Can fix with one shell command:

echo "{\n\t'version': 0,\n\t'case-sensitive': 'false',\n\t'roots': []\n}" > /[Long-path-goes-here]/all-product-headers.yaml

Where the path is copied out of the Xcode error.

See Daniel Schlaug's answer for background info