foo.cc: In function 'Dodecahedron::Bigint Dodecahedron::sub_number(Dodecahedron::Bigint&, Dodecahedron::Bigint&)':
foo.cc:505:44: warning: 'last_i_iterator' may be used uninitialized in this function [-Wmaybe-uninitialized]
  505 |               tmpx0 = tmpx3[last_i_iterator+1];
      |                             ~~~~~~~~~~~~~~~^~

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