What is the value of comint-output-filter-functions
?
Note the specific wording of the Changelog entry:
*** Support for OSC escape sequences.
Adding the new function 'comint-osc-process-output' to
'comint-output-filter-functions' enables the interpretation of OSC
("Operating System Command") escape sequences in comint buffers. By
default, only OSC 8, for hyperlinks, and OSC 7, for directory
tracking, are acted upon. Adding more entries to
'comint-osc-handlers' allows a customized treatment of further escape
sequences.
You have to add comint-osc-process-output
to the list of hooks in comint-output-filter-functions
before this feature will operate. You can do this by adding (add-hook 'comint-output-filter-functions 'comint-osc-process-output)
to your init file.