https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110905
--- Comment #2 from danakj at orodu dot net --- Ah ok. Here's a big reproduction: https://godbolt.org/z/Kj7Tcd6P4 /opt/compiler-explorer/gcc-trunk-20230804/include/c++/14.0.0/bits/stl_construct.h:97:14: in 'constexpr' expansion of '((sus::containers::VecIntoIter<sus::num::i32>*)<anonymous>)->sus::containers::VecIntoIter<sus::num::i32>::VecIntoIter((* & std::forward<sus::containers::VecIntoIter<sus::num::i32> >((* & __args#0))))' <source>:32895:22: error: use of deleted function 'sus::option::__private::Storage<sus::containers::VecIntoIter<sus::num::i32>, false>::<unnamed union>::<constructor>()' 32895 | struct [[nodiscard]] VecIntoIter final | ^~~~~~~~~~~ <source>:3015:9: note: 'sus::option::__private::Storage<sus::containers::VecIntoIter<sus::num::i32>, false>::<unnamed union>::<constructor>()' is implicitly deleted because the default definition would be ill-formed: 3015 | union { | ^ <source>:3015:9: error: no matching function for call to 'sus::containers::VecIntoIter<sus::num::i32>::VecIntoIter()' <source>:32953:13: note: candidate: 'constexpr sus::containers::VecIntoIter<ItemT>::VecIntoIter(sus::containers::Vec<ItemT>&&, sus::num::usize, sus::num::usize) [with ItemT = sus::num::i32]' 32953 | constexpr VecIntoIter(Vec<Item>&& vec, usize front, usize back) noexcept | ^~~~~~~~~~~ <source>:32953:13: note: candidate expects 3 arguments, 0 provided <source>:32951:13: note: candidate: 'constexpr sus::containers::VecIntoIter<ItemT>::VecIntoIter(sus::containers::Vec<ItemT>&&) [with ItemT = sus::num::i32]' 32951 | constexpr VecIntoIter(Vec<Item>&& vec) noexcept : vec_(::sus::move(vec)) {} | ^~~~~~~~~~~ <source>:32951:13: note: candidate expects 1 argument, 0 provided <source>:32895:22: note: candidate: 'constexpr sus::containers::VecIntoIter<sus::num::i32>::VecIntoIter(sus::containers::VecIntoIter<sus::num::i32>&&)' 32895 | struct [[nodiscard]] VecIntoIter final | ^~~~~~~~~~~ <source>:32895:22: note: candidate expects 1 argument, 0 provided Compiler returned: 1 I will try to shrink it now.
