The test I cnecked in to check the fix for PR#24890 failed (as expected) w/o the fix, but for the wrong reason. Now it fails for the right reason.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@248307 91177308-0d34-0410-b5e6-96231b3b80d8

test/std/utilities/utility/pairs/pairs.pair/swap.pass.cpp

@@ -20,6 +20,7 @@ struct S {
     int i; 
     S() : i(0) {}
     S(int j) : i(j) {}
+    S * operator& () { assert(false); return this; }
     S const * operator& () const { assert(false); return this; }
     bool operator==(int x) const { return i == x; }
     };