maxima 5.42.2 built with ecl 20.4.24 on 64-bit cygwin produces errors and crashes

ECL 20.4.24 (patched as on https://trac.sagemath.org/ticket/22191) builds Maxima 5.42.2 on Cygwin (64 bit) just fine, but running Maxima produces a number of crashes/errors errors. E.g.

1. diff(bessel_y(v,w),w); produces a crash

2. acosh(0.5); prints 1.047197551196598*%i-1.110223024625157e-16 (the real part should be 0)

3. evaluating bessel_j(2,s/10.0) for s in the range [0..99] produces a crash