updated for version 7.3.292
Problem:    Crash when using fold markers and selecting a visual block that
            includes a folded line and goes to end of line. (Sam Lidder)
Solution:   Check for the column to be MAXCOL. (James Vega)
diff --git a/src/screen.c b/src/screen.c
index 40d48ee..2c87e9b 100644
--- a/src/screen.c
+++ b/src/screen.c
@@ -2531,7 +2531,9 @@
 		/* Visual block mode: highlight the chars part of the block */
 		if (wp->w_old_cursor_fcol + txtcol < (colnr_T)W_WIDTH(wp))
 		{
-		    if (wp->w_old_cursor_lcol + txtcol < (colnr_T)W_WIDTH(wp))
+		    if (wp->w_old_cursor_lcol != MAXCOL
+			     && wp->w_old_cursor_lcol + txtcol
+						       < (colnr_T)W_WIDTH(wp))
 			len = wp->w_old_cursor_lcol;
 		    else
 			len = W_WIDTH(wp) - txtcol;