patch 8.2.2820: session file may divide by zero
Problem: Session file may divide by zero.
Solution: Avoid writing difide by zero. (closes #8162)
diff --git a/src/session.c b/src/session.c
index 6d1ccb5..8edf0da 100644
--- a/src/session.c
+++ b/src/session.c
@@ -456,11 +456,19 @@
// Restore the cursor line in the file and relatively in the
// window. Don't use "G", it changes the jumplist.
- if (fprintf(fd, "let s:l = %ld - ((%ld * winheight(0) + %ld) / %ld)",
+ if (wp->w_height <= 0)
+ {
+ if (fprintf(fd, "let s:l = %ld", (long)wp->w_cursor.lnum) < 0)
+ return FAIL;
+ }
+ else if (fprintf(fd,
+ "let s:l = %ld - ((%ld * winheight(0) + %ld) / %ld)",
(long)wp->w_cursor.lnum,
(long)(wp->w_cursor.lnum - wp->w_topline),
- (long)wp->w_height / 2, (long)wp->w_height) < 0
- || put_eol(fd) == FAIL
+ (long)wp->w_height / 2, (long)wp->w_height) < 0)
+ return FAIL;
+
+ if (put_eol(fd) == FAIL
|| put_line(fd, "if s:l < 1 | let s:l = 1 | endif") == FAIL
|| put_line(fd, "keepjumps exe s:l") == FAIL
|| put_line(fd, "normal! zt") == FAIL