// compiler will generate only a single runtime.slicetype data
// structure for all 3 underlying types. It turns out the compiler
// generates just the 251-entry one. There aren't any
// runtime.slicetypes generated for the final two types.
//
// The compiler passes type:[]...[]<...> (251 total "[]") to
// fmt.Sprintf (instead of the correct 253 one). But the data