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(buf_bytepos_to_charpos): Fix mixup introduced in commit b300052fb4

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Backport of commit 1b595b4598e7 since it turns out this "minor typo"
had disastrous consequences in pathological cases and explains
some of the problems seen in bug#71644 and bug#63040.

* src/marker.c (buf_bytepos_to_charpos): Don't compare byte-positions
with char-positions.
This commit is contained in:
Stefan Monnier 2024-06-27 15:36:28 -04:00
parent 48f4c9cbbc
commit 83234cc1db
1 changed files with 3 additions and 3 deletions
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6
src/marker.c
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@ -358,11 +358,11 @@ buf_bytepos_to_charpos (struct buffer *b, ptrdiff_t bytepos)
{
CONSIDER (tail->bytepos, tail->charpos);
/* If we are down to a range of 50 chars,
/* If we are down to a range of DISTANCE bytes,
don't bother checking any other markers;
scan the intervening chars directly now. */
if (best_above - bytepos < distance
|| bytepos - best_below < distance)
if (best_above_byte - bytepos < distance
|| bytepos - best_below_byte < distance)
break;
else
distance += BYTECHAR_DISTANCE_INCREMENT;