Message 118543 - Python tracker

> I am then confused by this in the initial comment:
> 
> > It calls indirectly PyUnicode_EncodeUTF8() and so call
> > PyBytes_FromStringAndSize() which allocates memory on the heap.
> 
> I've not studied the patch though, so this may have changed.

The patch certainly has changed, yes. In the latest patch, printing of
unicode message is done one code point at a time without allocating any
intermediary area.