5.3.1f1 Monodevelop does not start, creates a dead process (Solved: not a unity bug)

Using the latest version available as of me writing this, if I double-click on a C# file or try to explicitly open it nothing appears to happen. However, the process list shows an additional process started up, with command details showing up as "[bash] <defunct>". Each time I try to open a C# file, an additional process shows up in the process list, each with command details showing as "[bash] <defunct>".

Setting the preferences for external tools to refer explicitly to the monodevelop path does not change the behavior.

Update: I just noticed the following line in Editor.log that comes up when I try to open a script. The information may be relevant:

System.TypeInitializationException: The type initializer for 'MonoDevelop.Core.LoggingService' threw an exception. ---> System.InvalidCastException: Specified cast is not valid.

Update: Apparently, my mono installation is bad.... even the system monodevelop is giving me the same error. I will fix my mono installation and hopefully that will fix the issue

 

Okay, this is not a bug in Unity, as I initially thought. Apparently, a recent update to mono broke my mono installation, and the config files needed to be recreated. Deleting the entire /etc/mono folder and reinstalling the mono package made it work. Everything is working fine now.