commit 6009e6e25bdff9548f085e9ae562b1ca305d3a0b
from: Markus Rinne <markus.ka.rinne@gmail.com>
via: Hiltjo Posthuma <hiltjo@codemadness.org>
date: Fri Dec  6 12:42:50 2024 UTC

Clear screen: Fix edge case

With sequence \e[1J, if cursor is on second line, clear the first line.

commit - a0274bc20e11d8672bb2953fdd1d3010c0e708c5
commit + 6009e6e25bdff9548f085e9ae562b1ca305d3a0b
blob - 57c6e962ac778da43795ed855035b4554ebd02cf
blob + 2e3800e437ecda60d015a16da9f468c576337bb4
--- st.c
+++ st.c
@@ -1705,7 +1705,7 @@ csihandle(void)
 			}
 			break;
 		case 1: /* above */
-			if (term.c.y > 1)
+			if (term.c.y > 0)
 				tclearregion(0, 0, term.col-1, term.c.y-1);
 			tclearregion(0, term.c.y, term.c.x, term.c.y);
 			break;