patch 8.2.5024: using freed memory with "]d"

Problem:    Using freed memory with "]d".
Solution:   Copy the pattern before searching.

src/normal.c

@@ -4464,6 +4464,11 @@ nv_brackets(cmdarg_T *cap)
 	    clearop(cap->oap);
 	else
 	{
+	    // Make a copy, if the line was changed it will be freed.
+	    ptr = vim_strnsave(ptr, len);
+	    if (ptr == NULL)
+		return;
+
 	    find_pattern_in_path(ptr, 0, len, TRUE,
 		cap->count0 == 0 ? !isupper(cap->nchar) : FALSE,
 		((cap->nchar & 0xf) == ('d' & 0xf)) ?  FIND_DEFINE : FIND_ANY,
@@ -4472,6 +4477,7 @@ nv_brackets(cmdarg_T *cap)
 			    islower(cap->nchar) ? ACTION_SHOW : ACTION_GOTO,
 		cap->cmdchar == ']' ? curwin->w_cursor.lnum + 1 : (linenr_T)1,
 		(linenr_T)MAXLNUM);
+	    vim_free(ptr);
 	    curwin->w_set_curswant = TRUE;
 	}
     }

src/testdir/test_tagjump.vim

@@ -1399,6 +1399,12 @@ func Test_define_search()
   sil norm o0
   sil! norm 
   bwipe!
+
+  new somefile
+  call setline(1, ['first line', '', '#define something 0'])
+  sil norm 0o0
+  sil! norm ]d
+  bwipe!
 endfunc
 
 " Test for [*, [/, ]* and ]/

src/version.c

@@ -734,6 +734,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    5024,
 /**/
     5023,
 /**/