Error on F6 after code incorrectly colored as comment, using Large Letters

[Dexter Lagan]

Hi folks,

  On 7.6, Windows 10, after having inserted Large Letters, I'm getting the rest of the code showing as comment (brown color when using the dark theme). If I try to force a check and highlight using F6, I'm getting the following error (see screenshot attached):

send: target is not an object

  target: #f

  method name: last-position

Both as a message box and in the console.

Cheers,

Dexter

[Dexter Lagan]

  Note that the affected code is correctly displayed after the F6 press error. DrRacket seems unaffected beyond the error.

Dex