New Ion Error Formatted Document Shows No Problems

[almann]

When entering invalid Ion data in a new file, there are no reported problems. It is not clear that this is desired behavior or a bug.

1. Open a new window.
2. Open a new document.
3. Set document to ion.
4. Add invalid Ion data.

[therapon]

Until the file is detected as Ion, with the extension .ion the Ion specific checks are not enabled. From the screen show it looks like the file is Untitled-1 which is the temporary buffer created for a new file. Extension's detection mechanism currently is not using the content of the file (ala Unix magic files)

[almann]

Is this expected even if I set the file type directly? Note that syntax highlighting is working.

[therapon]

If the file type is set while the buffer is not associated with a file yet it should use kick the LSP checks and mark errors.