Completing a modal (Ctrl+F or Ctrl+L) while in "Find Next" mode of search causes crash

[CFiggers]

Error message:

error: could not find method :+ for nil
  in inc [boot.janet] on line 148, column 32
  in update [boot.janet] on line 1520, column 15
  in edup [src/joule.janet] (tailcall) on line 77, column 11
  in editor-scroll [src/joule.janet] on line 202, column 11
  in editor-refresh-screen [src/joule.janet] on line 451, column 34
  in <anonymous> [src/joule.janet] on line 1148, column 17
  in <anonymous> [src/joule.janet] on line 1151, column 16
  in main [src/joule.janet] on line 1145, column 3