Re: [boost] [test][range][BBv2?] issues with sub_range test

From: Thorsten Ottosen (thorsten.ottosen_at_[hidden])
Date: 2007-03-01 15:25:15

David Abrahams wrote:
> Thorsten Ottosen <thorsten.ottosen_at_[hidden]> writes:
> 
> 
>>David Abrahams wrote:
>>
>>>I'm seeing the following:
>>>
>>>1. The test appears to do invoke undefined behavior, almost knowingly.
>>>   On line 103, it asks whether a singular range (so named, even) is
>>>   empty.  This range is made up of singular iterators, the comparison
>>>   of which invokes undefined behavior.  In a debug build on VC8 this
>>>   fires an assertion ("string iterators incompatible"). This problem
>>>   should be fixed.  
>>>   
>>>   Every major standard library now has some iterator checking.  We
>>>   should do debug-mode tests of our code with iterator checking on.
>>>
>>
>>I've removed this line and similar from the test. 1.24 has been under 
>>way so long now, so I can't remember what's what anymore, but I think 
>>that the library allows a few operations even when the iterators are 
>>singular.
> 
> 
> Which library?

range
> 
>>That behavior has changed in cvs head btw.
> 
> 
> Which behavior?

the one you just saw failing on vc8.

-Thorsten