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-rw-r--r--form.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/form.c b/form.c
index 1e3aaad..71c19d0 100644
--- a/form.c
+++ b/form.c
@@ -442,6 +442,8 @@ formUpdateBuffer(Anchor *a, Buffer *buf, FormItemList *form)
switch (form->type) {
case FORM_INPUT_CHECKBOX:
case FORM_INPUT_RADIO:
+ if (spos >= buf->currentLine->len || spos < 0)
+ break;
if (form->checked)
buf->currentLine->lineBuf[spos] = '*';
else
@@ -485,7 +487,7 @@ formUpdateBuffer(Anchor *a, Buffer *buf, FormItemList *form)
spos = a->start.pos;
epos = a->end.pos;
}
- if (a->start.line != a->end.line || spos > epos || epos >= l->len)
+ if (a->start.line != a->end.line || spos > epos || epos >= l->len || spos < 0 || epos < 0)
break;
pos = form_update_line(l, &p, spos, epos, COLPOS(l, epos) - col,
rows > 1,