Boost.Accumulators regression in Boost 1.71 beta 1 on VC++17/19

From: Luigi Ballabio (luigi.ballabio_at_[hidden])
Date: 2019-08-03 09:40:41

Hello,
    the attached minimal file fails to compile on VC++17/19 when using
Boost 1.71.0b1.  It compiles successfully with Boost 1.70.0.  I also attach
the compiler errors.

Cheers,
    Luigi