why require.Equal in "github.com/stretchr/testify/require" can panic on two []byte?

I sometimes got panic: reflect.Value.Slice: slice index out of bounds [recovered] panic: reflect.Value.Slice: slice index out of bounds

When? Could you provide a reproducible example?

At least the current master doesn't seem to actually call reflect.Value.Slice, so I'd second the question for a crashing code sample :)