Criticals from libvala

[lw64]

While using vls very often criticals appear on stderr. This should be avoided.

[sonnyp]

For some context:

@lw64 added support for vala-language-server in Workbench 🥳 workbenchdev/Workbench#156

Workbench has a terminal in readonly mode for debugging. We used to show language servers stderr in there to help with user reports.

We had to stop because vls emit tons of criticals.

[Prince781]

These are criticals in libvala (notice the vala-CRITICAL), not VLS, which uses the vls namespace. So an upstream issue

@ricotz can chime in. I had a PR that would address some of this problem. IIRC most of these are from Vala.GirParser which gets called when we're building documentation for the first time.

[sonnyp]

FYI - Blueprint language server is also very verbose on stderr so I decided to stop displaying it to users.