X11new port drew left- and right-line attributes one pixel further down than was actually desired. You could get stray pixels that way.

Bill-Gray · Bill-Gray · commit 54251b2706d5 · 2025-12-31T12:53:07.000-05:00
diff --git a/x11new/pdcdisp.c b/x11new/pdcdisp.c
@@ -172,11 +172,11 @@ void PDC_transform_line(int lineno, int x, int len, const chtype *srcp)
              {
                  if( attr_out & A_LEFT)
                     XDrawLine( dis, win, curr_gc, xpix, ypix - PDC_font_height,
-                                                  xpix, ypix);
+                                                  xpix, ypix - 1);
                  xpix += PDC_font_width - 1;
                  if( attr_out & A_RIGHT)
                     XDrawLine( dis, win, curr_gc, xpix, ypix - PDC_font_height,
-                                                  xpix, ypix);
+                                                  xpix, ypix - 1);
                  xpix++;
              }
        }

Original file line number	Diff line number	Diff line change
`@@ -172,11 +172,11 @@ void PDC_transform_line(int lineno, int x, int len, const chtype *srcp)`
`172`	`172`	`{`
`173`	`173`	`if( attr_out & A_LEFT)`
`174`	`174`	`XDrawLine( dis, win, curr_gc, xpix, ypix - PDC_font_height,`
`175`		`- xpix, ypix);`
	`175`	`+ xpix, ypix - 1);`
`176`	`176`	`xpix += PDC_font_width - 1;`
`177`	`177`	`if( attr_out & A_RIGHT)`
`178`	`178`	`XDrawLine( dis, win, curr_gc, xpix, ypix - PDC_font_height,`
`179`		`- xpix, ypix);`
	`179`	`+ xpix, ypix - 1);`
`180`	`180`	`xpix++;`
`181`	`181`	`}`
`182`	`182`	`}`