assertion failed in upvalue get_typenum

[eigenbom]

I was experimenting with tl and the vscode plugin, i began to type local type vec3 = and upon entering another character (e.g., "r") the tl compiler crashed with the following assert:

[hishamhm]

@eigenbom Thank you for reporting! This will be fixed by #612!

[eigenbom]

Thx Hisham :)