// { dg-do run }
#include <cxxabi.h>
#include <cassert>
#include <cstddef>
int main()
{
std::size_t length = 0;
int cc;
char* ret = abi::__cxa_demangle("e", 0, &length, &cc);
assert( (cc < 0 && !ret) || (ret && length) );
return 0;
}