MacTeX 2019, asymptote stopped working using the `-render` option

Question

Yesterday I installed TeXLive 2019 on my Mac using MacTeX 2019. I am working quite a lot with asymptote, so I was surprised, that asy seemed to have stopped working. No error message, but also no resulting png (I like pngs).

Today I found out that for any .asy the command asy -f png myFile.asy perfectly produces a png in a quite bad resolution, as does asy -f png -render 0 myFile.asy (well, 0 is the default). But any value larger than 0 results in no png being created.

My preferred setting would be 4 or even 5. Can somebody confirm, that for now it stopped working? What did change in asymptote (or the converter used to get from .eps to .png) that made it stop working and how can I get that back?

Edit: To also provide an example, let's just draw two arrows

import settings;
import three;
size(7cm);
DefaultHead.size=new real(pen p=currentpen) {return 1.8mm;};
currentprojection=perspective( camera = (0.0, 0.0, 4.0), up=Y, target = (0.0, 0.0, 0.0) );

draw( (0.0, 0.0, 0.0)--(0.7071, 0.7071, 0.0), rgb(0.565, 0.128,0.550), Arrow3);
draw( (1.0, 0.0, 0.0)--(1.6, 0.7071, 0.0), rgb(0.128,0.565,0.550), Arrow3);

Then

• asy example.asy produces a nice eps
• asy -f png example.asy produces a quite low res png (since 2019 with transparent background)
• asy -f png -render 1 example.asy does not give an error, but neither produces a file, the same for setting render to 2,3,4 or 5.
• as marmot suggested I also tried putting settings.render=4; into the file, which has the same effect as the last try with -render (so at least its consistently broken).

Answer 1

The error posten in the original question was a bug with MacTeX (TexLive) 2019. With MacTeX 2020, this is fixed. To get the rendering option back and work correctly, update to MacTeX 2020; tested with Mac OS Catalina.