Description

When setting the font say globally, with #set text(font: "abcdefg"), if the font is not found (say because it doesn't exist), the output of typst compile doesn't change and the compiler doesn't throw any errors. An error should also be thrown if the appropriate weight/size/etc. cannot be used.

Use Case

This follows the Principle of Least Surprise: if you manually set the font and the output doesn't change, that's strange. The compiler should throw an error (or at the very least, a warning).