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csi: \E[3J: reset render.last_cursor.row if necessary

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This fixes a crash that occurred when the last rendered cursor cell
had scrolled off screen, and \E[3J (clear scrollback) was executed.
This commit is contained in:
Daniel Eklöf 2020-06-09 17:32:34 +02:00
parent fb001ee7a7
commit bf57d0c606
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2 changed files with 5 additions and 0 deletions
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2
CHANGELOG.md
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@ -55,6 +55,8 @@
* Glyphs overflowing into surrounding cells * Glyphs overflowing into surrounding cells
(https://codeberg.org/dnkl/foot/issues/21). (https://codeberg.org/dnkl/foot/issues/21).
* Sixel images being erased when printing text next to them. * Sixel images being erased when printing text next to them.
* Crash when last rendered cursor cell had scrolled off screen and
`\E[J3` was executed.
### Security ### Security

3
csi.c
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@ -506,6 +506,9 @@ csi_dispatch(struct terminal *term, uint8_t final)
continue; continue;
} }
if (term->render.last_cursor.row == term->grid->rows[i])
term->render.last_cursor.row = NULL;
grid_row_free(term->grid->rows[i]); grid_row_free(term->grid->rows[i]);
term->grid->rows[i] = NULL; term->grid->rows[i] = NULL;
} }