If you and others agree, I think we should change the link to dev.lfortran.org. It’s not full Fortran but it works for what it supports.
I just went in to the playground server again and unfortunately the way its Docker is set up (or perhaps this is just how Docker works) has accumulated artifacts to fill the 20 GB space of the micro instance. I’m not familiar enough with Docker to configure it around this properly, but I cleaned up and rebooted the instance and now the Hello World example responds with:
<ERROR>*cmd_run*:package error:Package name is not provided, please add a name entry
STOP 1
This is an fpm error message complaining about name missing from fpm.toml and it’s not immediately clear to me why this is happening. I haven’t tried reproducing locally. It’s possibly related to limited resources of a micro instance (1/8 of a CPU I believe)
So until we have further contributions and improvements to the playground server (i.e. fixing up or removing the Docker layer and hardening against harmful code) and we can show that it can work sustainably, I suggest to point the Play link to a browser compiler (LFortran) or just remove it.