Using GDC rev 186 and Tango rev 2649, tango.io.FilePath produces an ice:
/Users/carlos/Development/d/tango/trunk/tango/io/FilePath.d: In function 'padded':
/Users/carlos/Development/d/tango/trunk/tango/io/FilePath.d:609: internal compiler error: Bus error
This doesn't happen with rev 168, but I don't know which revision introduced this regression. The source code for that module is at http://dsource.org/projects/tango/browser/trunk/tango/io/FilePath.d?rev=2649