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struct X { X(const X&) = delete; };
 
void demo(const X& m)
{
	auto f = [m](){};
}

prog.cpp: In function 'void demo(const X&)':
prog.cpp:5:11: error: use of deleted function 'X::X(const X&)'
  auto f = [m](){};
           ^
prog.cpp:1:12: note: declared here
 struct X { X(const X&) = delete; };
            ^
prog.cpp:5:17: error: use of deleted function 'demo(const X&)::<lambda()>::<lambda>(demo(const X&)::<lambda()>&&)'
  auto f = [m](){};
                 ^
prog.cpp:5:13: note: 'demo(const X&)::<lambda()>::<lambda>(demo(const X&)::<lambda()>&&)' is implicitly deleted because the default definition would be ill-formed:
  auto f = [m](){};
             ^
prog.cpp:5:13: error: use of deleted function 'X::X(const X&)'
prog.cpp:1:12: note: declared here
 struct X { X(const X&) = delete; };
            ^

Standard output is empty