patch 8.2.2444: Vim9: compile error with combination of operator and list

Problem:    Vim9: compile error with combination of operator and list.
Solution:   Generate constants before parsing a list or dict. (closes #7757)

Author: brammool

src/testdir/test_vim9_expr.vim

@@ -1083,6 +1083,9 @@ def Test_expr5()
         assert_equal('a0.123', 'a' .. 0.123)
       endif
 
+      assert_equal(3, 1 + [2, 3, 4][0])
+      assert_equal(5, 2 + {key: 3}['key'])
+
       set digraph
       assert_equal('val: true', 'val: ' .. &digraph)
       set nodigraph

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2444,
 /**/
     2443,
 /**/

src/vim9compile.c

@@ -4121,13 +4121,17 @@ compile_expr7(
 	/*
 	 * List: [expr, expr]
 	 */
-	case '[':   ret = compile_list(arg, cctx, ppconst);
+	case '[':   if (generate_ppconst(cctx, ppconst) == FAIL)
+			return FAIL;
+		    ret = compile_list(arg, cctx, ppconst);
 		    break;
 
 	/*
 	 * Dictionary: {'key': val, 'key': val}
 	 */
-	case '{':   ret = compile_dict(arg, cctx, ppconst);
+	case '{':   if (generate_ppconst(cctx, ppconst) == FAIL)
+			return FAIL;
+		    ret = compile_dict(arg, cctx, ppconst);
 		    break;
 
 	/*