toml: fix implicit array allocation (#12553)

vlib/toml/parser/parser.v

@@ -776,16 +776,19 @@ pub fn (mut p Parser) double_array_of_tables(mut table map[string]ast.Value) ? {
 			// Implicit allocation
 			if p.last_aot.len == 0 {
 				util.printdbg(@MOD + '.' + @STRUCT + '.' + @FN, 'implicit allocation of array for dotted key `$dotted_key`.')
-				table[first.str()] = []ast.Value{}
 				p.last_aot = first
 				// We register this implicit allocation as *explicit* to be able to catch
 				// special cases like:
 				// https://github.com/BurntSushi/toml-test/blob/576db852/tests/invalid/table/array-implicit.toml
 				p.explicit_declared << first
 
-				t_arr = &(table[p.last_aot.str()] as []ast.Value)
-				t_arr << ast.Value(map[string]ast.Value{})
-				p.last_aot_index = t_arr.len - 1
+				mut nm := map[string]ast.Value{}
+				nm[last.str()] = []ast.Value{}
+				table[first.str()] = ast.Value(nm)
+
+				t_arr = &(nm[last.str()] as []ast.Value)
+				t_arr << p.array_of_tables_contents() ?
+				return
 			} else {
 				return error(@MOD + '.' + @STRUCT + '.' + @FN +
 					' nested array of tables key "$first" does not match "$p.last_aot". (excerpt): "...${p.excerpt()}..."')

vlib/toml/tests/burntsushi.toml-test_test.v

@@ -17,8 +17,6 @@ const (
 	valid_value_exceptions = [
 		// Integer
 		'integer/long.toml', // TODO awaits BUG fix with strconv.parse_int('-9223372036854775808')
-		// Table
-		'table/array-implicit.toml',
 		// Date-time
 		'datetime/milliseconds.toml',
 		// Key