[Bug libstdc++/30416] SIGSEGV in valarray::cshift(n) on empty array

[gdr at integrable-solutions dot net]

------- Comment #7 from gdr at integrable-solutions dot net  2007-01-10 03:33 -------
Subject: Re:  SIGSEGV in valarray::cshift(n) on empty array

"sebor at roguewave dot com" <gcc-bugzilla@gcc.gnu.org> writes:

| (In reply to comment #3)
| > The standard refers to "(l+n)%size()", so if size()=0, that seems to be
| > undefined. On the other hand, it seems fairly obvious what should happen in
| > this case (ie nothing).
| 
| The requirement is to "return an object of length size() each of whose
| elements..." If there are no elements the "..." doesn't/cannot apply. 

I disagree.  The specification is not that of unconditional return.
And if that is what is intended, then that is not what the standard wrote.

-- Gaby


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30416