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(Windows) The default C++ standard had accidentally been left at C++11 when it was changed to C++14 on Unix. It is now C++14 as documented.
‘attach()’ of an environment with active bindings now preserves the active bindings. Reported by Kevin Ushey in PR#18425.
‘solve.default(a, b)’ works around issues with some versions of LAPACK when ‘a’ contains ‘NA’ or ‘NaN’ values.