xfree (substed);
}
+ /* The functions below modify the buffer, so they could trigger
+ various modification hooks (see signal_before_change and
+ signal_after_change), which might clobber the match data we need
+ to adjust after the replacement. If that happens, we error out. */
+ ptrdiff_t sub_start = search_regs.start[sub];
+ ptrdiff_t sub_end = search_regs.end[sub];
+ unsigned num_regs = search_regs.num_regs;
+
/* Replace the old text with the new in the cleanest possible way. */
replace_range (search_regs.start[sub], search_regs.end[sub],
newtext, 1, 0, 1);
Fupcase_initials_region (make_number (search_regs.start[sub]),
make_number (newpoint));
+ if (search_regs.start[sub] != sub_start
+ || search_regs.end[sub] != sub_end
+ || search_regs.num_regs != num_regs)
+ error ("Match data clobbered by buffer modification hooks");
+
/* Adjust search data for this change. */
{
ptrdiff_t oldend = search_regs.end[sub];