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undo: don't try to copy a string that doesn't exist 

This fixes https://savannah.gnu.org/bugs/?57051.

Bug existed since commit d256d0cb from earlier today.
master
Benno Schulenberg 2019-10-13 17:31:53 +02:00
parent ba79602281
commit 2656f543f4
1 changed files with 1 additions and 0 deletions
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src/text.c
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@ -1226,6 +1226,7 @@ void add_undo(undo_type action, const char *message)
u->lineno += cutbottom->lineno - cutbuffer->lineno; u->lineno += cutbottom->lineno - cutbuffer->lineno;
break; break;
case INSERT: case INSERT:
break;
case COUPLE_BEGIN: case COUPLE_BEGIN:
u->mark_begin_lineno = openfile->current_y; u->mark_begin_lineno = openfile->current_y;
case COUPLE_END: case COUPLE_END: