[Bug libstdc++/29286] [4.0/4.1/4.2/4.3 Regression] placement new does not change the dynamic type as it should

[mark at codesourcery dot com]

------- Comment #80 from mark at codesourcery dot com  2007-05-18 07:26 -------
Subject: Re:  [4.0/4.1/4.2/4.3 Regression] placement
 new does not change the dynamic type as it should

ian at airs dot com wrote:
> ------- Comment #78 from ian at airs dot com  2007-05-18 07:14 -------
> The test case in comment #73 is just a standard aliasing violation.  You are
> casting a double* to an int* and writing to it both ways.

I'm confused.  The double-ness looks irrelevant to me; it could just as
well be "void *".  The only actual accesses to the memory are through an
"int *" pointer and a "long *" pointer, and there's a placement new
between the two.  I thought the whole point of these patches was to
allow placement new to change the type in exactly this way?


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29286