fix(column): apply custom highlight to last 'statuscolumn' segment (#32182)

src/nvim/drawline.c

@@ -654,8 +654,8 @@ static void draw_statuscol(win_T *wp, winlinevars_T *wlv, linenr_T lnum, int vir
     p = sp->start;
   }
   size_t translen = transstr_buf(p, buf + len - p, transbuf, MAXPATHL, true);
-  draw_col_buf(wp, wlv, transbuf, translen, num_attr, fold_vcol, false);
-  draw_col_fill(wlv, schar_from_ascii(' '), stcp->width - width, num_attr);
+  draw_col_buf(wp, wlv, transbuf, translen, cur_attr, fold_vcol, false);
+  draw_col_fill(wlv, schar_from_ascii(' '), stcp->width - width, cur_attr);
 }
 
 static void handle_breakindent(win_T *wp, winlinevars_T *wlv)

test/functional/ui/statuscolumn_spec.lua

@@ -227,6 +227,14 @@ describe('statuscolumn', function()
       {1: }{8:8│}aaaaa                                             |
                                                            |
     ]])
+    -- Last segment and fillchar are highlighted properly
+    command("set stc=%#Error#%{v:relnum?'Foo':'FooBar'}")
+    screen:expect([[
+      {9:Foo   }aaaaa                                          |*4
+      {9:FooBar}^aaaaa                                          |
+      {9:Foo   }aaaaa                                          |*8
+                                                           |
+    ]])
   end)
 
   it('works with wrapped lines, signs and folds', function()