// PR c++/6179// Bug: we tried to look at the fields of 'const A' to determine the proper// exception specification for the synthesized copy constructor, but// TYPE_FIELDS hadn't been set yet, so we incorrectly got a throw() spec.struct B{  B () {}  B (const B&) { throw 1; }};struct A;void f (const A &) {}struct A{  B b;};int main (){  A a;    try    { A a2 (a); }  catch (...)    { }}