graphs are duplicated (one empty)

[snicolai]

After upgrading to MiniZinc 2.9.0 on MacOS I get two graphs (one empty) for every graph output statement. For example:

output vis_line([(i): i | i in years], [(i): round(income[i]) | i in years], "year", "Income");

gives

[cyderize]

Hi, I haven't been able to reproduce this on Windows so far - are you able to post a model with data that has this problem?