patch 8.1.2155: in a terminal window 'cursorlineopt' does not work properly

Problem:    In a terminal window 'cursorlineopt' does not work properly.
Solution:   Check the 'cursorlineopt' value. (closes #5055)

src/drawline.c

@@ -1401,14 +1401,7 @@ win_line(
 	    {
 #ifdef FEAT_TERMINAL
 		if (get_term_attr)
-		{
 		    syntax_attr = term_get_attr(wp->w_buffer, lnum, vcol);
-
-		    if (!attr_pri)
-			char_attr = syntax_attr;
-		    else
-			char_attr = hl_combine_attr(syntax_attr, char_attr);
-		}
 #endif
 
 #ifdef FEAT_SYN_HL
@@ -2295,7 +2288,8 @@ win_line(
 		    if (win_attr != 0)
 		    {
 			char_attr = win_attr;
-			if (wp->w_p_cul && lnum == wp->w_cursor.lnum)
+			if (wp->w_p_cul && lnum == wp->w_cursor.lnum
+				    && wp->w_p_culopt_flags != CULOPT_NBR)
 			{
 			    if (!cul_screenline || (vcol >= left_curline_col
 						  && vcol <= right_curline_col))

src/testdir/dumps/Test_terminal_normal_1.dump

@@ -0,0 +1,8 @@
+| +0#af5f00255#ffffff0@1|1| |1+0#0000000&@4| @65
+| +0#af5f00255&@1|2| |1+0#0000000&@3|2| @65
+| +8#af5f00255&@1|3| >1+8#0000000&@3|3| @65
+| +0#af5f00255&@1|4| |1+0#0000000&@3|4| @65
+| +0#af5f00255&@1|5| |1+0#0000000&@3|5| @65
+| +0#af5f00255&@1|6| |1+0#0000000&@3|6| @65
+| +0#af5f00255&@1|7| |1+0#0000000&@3|7| @65
+|:|s|e|t| |n|u|m|b|e|r| |c|u|r|s|o|r|l|i|n|e| |c|u|l|o|p|t|=|b|o|t|h| @22|3|,|1| @10|T|o|p| 

src/testdir/dumps/Test_terminal_normal_2.dump

@@ -0,0 +1,8 @@
+| +0#af5f00255#ffffff0@1|1| |1+0#0000000&@4| @65
+| +0#af5f00255&@1|2| |1+0#0000000&@3|2| @65
+| +8#af5f00255&@1|3| >1+0#0000000&@3|3| @65
+| +0#af5f00255&@1|4| |1+0#0000000&@3|4| @65
+| +0#af5f00255&@1|5| |1+0#0000000&@3|5| @65
+| +0#af5f00255&@1|6| |1+0#0000000&@3|6| @65
+| +0#af5f00255&@1|7| |1+0#0000000&@3|7| @65
+|:|s|e|t| |c|u|l|o|p|t|=|n|u|m|b|e|r| @38|3|,|1| @10|T|o|p| 

src/testdir/dumps/Test_terminal_normal_3.dump

@@ -0,0 +1,8 @@
+| +0#af5f00255#ffffff0@1|1| |1+0#0000000&@4| @65
+| +0#af5f00255&@1|2| |1+0#0000000&@3|2| @65
+| +0#af5f00255&@1|3| >1+8#0000000&@3|3| @65
+| +0#af5f00255&@1|4| |1+0#0000000&@3|4| @65
+| +0#af5f00255&@1|5| |1+0#0000000&@3|5| @65
+| +0#af5f00255&@1|6| |1+0#0000000&@3|6| @65
+| +0#af5f00255&@1|7| |1+0#0000000&@3|7| @65
+|:|s|e|t| |c|u|l|o|p|t|=|l|i|n|e| @40|3|,|1| @10|T|o|p| 

src/testdir/test_terminal.vim

@@ -1906,6 +1906,33 @@ func Test_terminal_switch_mode()
   bwipe!
 endfunc
 
+func Test_terminal_normal_mode()
+  CheckRunVimInTerminal
+
+  " Run Vim in a terminal and open a terminal window to run Vim in.
+  let lines =<< trim END
+    call setline(1, range(11111, 11122))
+    3
+  END
+  call writefile(lines, 'XtermNormal')
+  let buf = RunVimInTerminal('-S XtermNormal', {'rows': 8})
+  call term_wait(buf)
+
+  call term_sendkeys(buf, "\<C-W>N")
+  call term_sendkeys(buf, ":set number cursorline culopt=both\r")
+  call VerifyScreenDump(buf, 'Test_terminal_normal_1', {})
+
+  call term_sendkeys(buf, ":set culopt=number\r")
+  call VerifyScreenDump(buf, 'Test_terminal_normal_2', {})
+
+  call term_sendkeys(buf, ":set culopt=line\r")
+  call VerifyScreenDump(buf, 'Test_terminal_normal_3', {})
+
+  call term_sendkeys(buf, "a:q!\<CR>:q\<CR>:q\<CR>")
+  call StopVimInTerminal(buf)
+  call delete('XtermNormal')
+endfunc
+
 func Test_terminal_hidden_and_close()
   CheckUnix
 

src/version.c

@@ -753,6 +753,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2155,
 /**/
     2154,
 /**/