https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85889
--- Comment #13 from Giuseppe D'Angelo <dangelog at gmail dot com> --- Not sure; N4659 says https://timsong-cpp.github.io/cppwp/n4659/expr.prim.lambda.capture#4 "The identifier in a simple-capture is looked up using the usual rules for unqualified name lookup; each such lookup shall find an entity" and then https://timsong-cpp.github.io/cppwp/n4659/basic#3 "An entity is a value, object, reference, function, enumerator, type, class member, bit-field, template, template specialization, namespace, or parameter pack." ... so a structured binding didn't qualify to be captured because it was not an entity (?)
