[Octave-bug-tracker] [bug #63930] fprintf writes incorrect characters when converting the encoding

[Markus Mützel]

Follow-up Comment #58, bug #63930 (project octave):

`srclen=140255252715919` doesn't look right. That looks more like it is a
pointer address in the range of the other pointers appearing in the backtrace
(0x7F8FB884198F).

It is calculated like this in `octave::string::codecvt_u8::do_out` in
oct-string.cc:653:

  std::size_t srclen = (from_end-from-pop_end) * sizeof (InternT);


`pop_end` should be 0. `sizeof (InternT)` should be 1 (InternT is char).
So, it should be the difference between the addresses pointed to by `from_end`
and `from`. Theoretically that should be a maximum of 64 in that example...


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