[BUG] Incomplete code crashes compiler and LSP

[soraros]

Bug description

As title. Only happens if the line is above an assignment.

Steps to reproduce

import math

fn main():
  math.  # cursor after .
  b = 2

The following works:

import math

fn main():
  (math.)  # cursor after .
  b = 2

import math

fn main():
  math.  # cursor after .

System information

Mojo 2024.9.2405 (094f5635) on Docker, Intel Mac