On 6/3/20 5:43 PM, Paul Eggert wrote:
> On 6/3/20 4:48 PM, João Távora wrote:
>> I think I'd rather this previous behavior were retained, or at least
>> achievable by request.
> 
> It's tricky, as make-text-button in emacs-27 (and earlier) modifies its string
> argument, which is buggy because string constants are not always unique.

On second thought, I'll work on coming up with a better workaround for the
problem along the lines I suggested in my previous message: make-text-button can
copy the button label string only if the string's not mutable. I hope this helps
with SLY (as I hope SLY is not trying to modify string literals...). In the
meantime I've reverted the change by installing the attached patch; this means
the bug I mentioned in my previous message remains unfixed.