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// { dg-do run { target c++17 xfail *-*-* } }
// { dg-require-debug-mode "" }
#include <unordered_set>
#include <algorithm>
#include <testsuite_hooks.h>
using test_type = std::unordered_multiset<int>;
void
test01()
{
test_type c0{ 1, 1, 2, 2, 3, 3 };
test_type c1 = c0;
auto it = c1.find(2);
VERIFY( *it == 2 );
c0.merge(c1);
VERIFY( it != c1.end() ); // Invalid iterator.
}
int
main()
{
test01();
}
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