patch 8.1.0567: error for NUL byte in ScreenLines goes unnoticed
Problem: Error for NUL byte in ScreenLines goes unnoticed.
Solution: Add an internal error message.
diff --git a/src/gui.c b/src/gui.c
index b961108..9291366 100644
--- a/src/gui.c
+++ b/src/gui.c
@@ -2753,9 +2753,15 @@
}
else if (enc_utf8)
{
- // FIXME: how can the first character ever be zero?
- if (col1 > 0 && ScreenLines[off + col1] == 0)
- --col1;
+ if (ScreenLines[off + col1] == 0)
+ {
+ if (col1 > 0)
+ --col1;
+ else
+ // FIXME: how can the first character ever be zero?
+ IEMSGN("INTERNAL ERROR: NUL in ScreenLines in row %ld",
+ gui.row);
+ }
# ifdef FEAT_GUI_GTK
if (col2 + 1 < Columns && ScreenLines[off + col2 + 1] == 0)
++col2;