https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112477

Dave Martin <dave.martin at giref dot ulaval.ca> changed:

           What    |Removed                     |Added
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                 CC|                            |dave.martin at giref dot 
ulaval.ca

--- Comment #3 from Dave Martin <dave.martin at giref dot ulaval.ca> ---
I have a very similar issue using operator= (https://godbolt.org/z/cj7Gbn1e8)

#define _GLIBCXX_DEBUG
#include <set>

int main()
{ 
  using S = std::set<int>;

  S set {1};
  auto it = set.begin();
  it = S::const_iterator();

  auto it2 = it; 

  return 0;
}

Results in 

  Error: attempt to copy-construct an iterator from a singular iterator.

I am also confused as to why this shouldn't "just work".

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