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Eobjdump do meu arquivo .o revela que tenho dois destruidores diferentes para a mesma classe. Por quê?

Disassembly of section .text._ZN1AD0Ev:

0000000000000000 <_ZN1AD0Ev>:
   0:   53                      push   %rbx
   1:   be 00 00 00 00          mov    $0x0,%esi
   6:   48 89 fb                mov    %rdi,%rbx
   9:   48 c7 07 00 00 00 00    movq   $0x0,(%rdi)
  10:   ba 2c 00 00 00          mov    $0x2c,%edx
  15:   bf 00 00 00 00          mov    $0x0,%edi
  1a:   e8 00 00 00 00          callq  1f <_ZN1AD0Ev+0x1f>
  1f:   48 89 df                mov    %rbx,%rdi
  22:   be 08 00 00 00          mov    $0x8,%esi
  27:   5b                      pop    %rbx
  28:   e9 00 00 00 00          jmpq   2d <_ZN1AD0Ev+0x2d>

Disassembly of section .text._ZN1AD2Ev:

0000000000000000 <_ZN1AD1Ev>:
   0:   48 c7 07 00 00 00 00    movq   $0x0,(%rdi)
   7:   ba 2c 00 00 00          mov    $0x2c,%edx
   c:   be 00 00 00 00          mov    $0x0,%esi
  11:   bf 00 00 00 00          mov    $0x0,%edi
  16:   e9 00 00 00 00          jmpq   1b <_ZN1AD1Ev+0x1b>

Estas são as classes no arquivo de cabeçalho que resultam na geração deste código:

#include <iostream>

class A {
 public:
   virtual ~A() {
      ::std::cout << "This destructor does something significant.\n";
   }
};

class B : public A {
 public:
   inline virtual ~B() = 0;
};

B::~B() = default;

class C : public B {
 public:
   inline virtual ~C() = default;
};