The following code incorrectly compiles, and worse returns incorrect result.
on i686-pc-linux-gnu, both 4.1.0 and 4.1.1
-- start snip
#include <stddef.h>
// (incomplete) template class that encapsulates an array of chars
template<int i> class CharArray
{
public:
char d[i];
char& operator [] ( int indx )
{
return d[indx];
}
};
struct Foo
{
int i;
CharArray<44> caCharArray;
};
int main( int argc, char* argv[] )
{
Foo foo;
int i;
// Shouldn't compile, and worse results in incorrect offset.
i = offsetof(Foo, caCharArray[0]);
}
-- end snip
variables as an array index correctly give an error, but unfortunatly not
everything that looks like an constant array index is.
--
Summary: incorrectly allowing non-constant expression to
offsetof()
Product: gcc
Version: 4.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: karl dot corbin at Summit dot Fiserv dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28573
