retro() on a `string` creates a range of `dchar`, causing array()

[Ali Çehreli]

On 04/17/2012 12:57 PM, bearophile wrote:

 >> The algorithm
 >> above is not exception-safe because stride() may throw. But this way off
 >> topic on this thread. :)
 >

 > You can't expect Phobos to be perfect, it needs to be improved
 > iteratively. If you think that's not exception safe and and there are 
simple
 > means to do it, then please add this in Bugzilla. Being formally 
aware of a
 > problem is the second step toward improving the situation.

Agreed.

But I am not that sure about this particular function anymore because 
for the function to be not 'strongly exception safe', the input string 
must be invalid UTF-8 to begin with.

I am not sure how bad it is to not preserve the actual invalidness of 
the string in that case. :)

Ali