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. That behavior has changed in cvs head btw. -Thorsten