patch 8.2.1963: crash when using a popup window with "latin1" encoding
Problem: Crash when using a popup window with "latin1" encoding.
Solution: Don't use ScreenLinesUC when enc_utf8 is false. (closes #7241)
diff --git a/src/screen.c b/src/screen.c
index 6e907cd..b204de9 100644
--- a/src/screen.c
+++ b/src/screen.c
@@ -464,7 +464,8 @@
// First char of a popup window may go on top of the right half of a
// double-wide character. Clear the left half to avoid it getting the popup
// window background color.
- if (coloff > 0 && ScreenLines[off_to] == 0
+ if (coloff > 0 && enc_utf8
+ && ScreenLines[off_to] == 0
&& ScreenLinesUC[off_to - 1] != 0
&& (*mb_char2cells)(ScreenLinesUC[off_to - 1]) > 1)
{