patch 9.0.2146: text-property without type errors when joining

Problem:  text-property without type errors when joining
Solution: count all text-properties, with or without type
          before joining lines

Error when joining lines with text properties without a proper type

When joining lines, we need to consider all text properties that are
attached to a line, even when those text properties are invalid and do
not have a type attached to them.

However, since patch v9.0.0993
(commit: 89469d157a)
those text properties won't be counted when joining lines and therefore
this will cause the adjustment for text properties on joining to go
wrong (and may later cause SIGABRT with an invalid free pointer)

I am not sure, why the condition to not count text properties with a
valid type was added in patch v9.0.993, because no test fails if those
condition is removed. So let's just remove this condition and add a test
that verifies, that we are able to join lines, even when the text
properties attached to it do not have a valid type.

fixes: #13609
closes: #13614

Signed-off-by: Christian Brabandt <cb@256bit.org>

src/testdir/test_textprop.vim

@@ -4410,4 +4410,19 @@ func Test_virtual_text_get()
   bwipe!
 endfunc
 
+" This used to throw: E967
+func Test_textprop_notype_join()
+  new Xtextprop_no_type_join
+  call setline(1, range(1, 3))
+  call cursor(1, 1)
+  let name = 'a'
+  call prop_type_add(name, {})
+  call prop_add(line('.'), col('.'), { 'type': name })
+  call prop_type_delete(name, {})
+  join
+  call assert_equal(["1 2", "3"], getline(1, '$'))
+
+  bwipe!
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab

src/textprop.c

@@ -630,7 +630,7 @@ get_text_props(buf_T *buf, linenr_T lnum, char_u **props, int will_change)
     size_t textlen;
     size_t proplen;
 
-    // Be quick when no text property types have been defined or the buffer,
+    // Be quick when no text property types have been defined for the buffer,
     // unless we are adding one.
     if ((!buf->b_has_textprop && !will_change) || buf->b_ml.ml_mfp == NULL)
 	return 0;
@@ -714,8 +714,7 @@ count_props(linenr_T lnum, int only_starting, int last_line)
 	// previous line, or when not in the last line and it is virtual text
 	// after the line.
 	if ((only_starting && (prop.tp_flags & TP_FLAG_CONT_PREV))
-		|| (!last_line && prop.tp_col == MAXCOL)
-		|| !text_prop_type_valid(curbuf, &prop))
+		|| (!last_line && prop.tp_col == MAXCOL))
 	    --result;
     }
     return result;

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2146,
 /**/
     2145,
 /**/