parser: fix optional expr with array value (#13599)

vlib/v/parser/expr.v

@@ -376,9 +376,7 @@ pub fn (mut p Parser) expr_with_left(left ast.Expr, precedence int, is_stmt_iden
 				return node
 			}
 			p.is_stmt_ident = is_stmt_ident
-		} else if p.tok.kind in [.lsbr, .nilsbr]
+		} else if p.tok.kind in [.lsbr, .nilsbr] && p.tok.line_nr == p.prev_tok.line_nr {
-			&& (p.inside_fn || p.tok.line_nr == p.prev_tok.line_nr) {
-			// node = p.index_expr(node)
 			if p.tok.kind == .nilsbr {
 				node = p.index_expr(node, true)
 			} else {

vlib/v/parser/tests/const_index.vv

@@ -3,9 +3,7 @@ const x = 4
 [deprecated]
 fn g() {
 	a := [3]
-	// indexing is currently allowed on next line
+	_ = a[0]
-	_ = a
-	[0]
 }
 
 const y = 5
@@ -16,7 +14,5 @@ const z = 6
 [typedef]
 struct C.Foo{}
 
-// test implicit main allows indexing on next line
 a := [3]
-_ := a
+_ := a[0]
-[0]

vlib/v/tests/option_expr_with_array_value_test.v

@@ -0,0 +1,23 @@
+struct Empty {
+	empty string
+}
+
+fn print_error() ?[]Empty {
+	mut test := []Empty{}
+	test << Empty{
+		empty: 'Test'
+	}
+	if test[0].empty != '' {
+		return error('Not empty')
+	}
+	return test
+}
+
+fn test_option_expr_with_array_value() {
+	test_error := print_error() or {
+		eprintln(err)
+		[]Empty{}
+	}
+	println(test_error)
+	assert '$test_error' == '[]'
+}