comint-redirect-subvert-readonly

comint-redirect-subvert-readonly is a variable defined in `comint.el'.
Its value is

nil

Documentation:
Non-nil means `comint-redirect' can insert into read-only buffers.
This works by binding `inhibit-read-only' around the insertion.
This is useful, for instance, for insertion into Help mode buffers.
You probably want to set it locally to the output buffer.