JS: fix precedence of OptionalChaining expression

tdewolff · Feb 16, 2024 · 3b2a162 · 3b2a162
1 parent 3381c44
commit 3b2a162
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Showing 2 changed files with 4 additions and 0 deletions.
diff --git a/js/parse.go b/js/parse.go
@@ -2002,6 +2002,9 @@ func (p *Parser) parseExpressionSuffix(left IExpr, prec, precLeft OpPrec) IExpr
 		case OptChainToken:
 			if OpCall < prec {
 				return left
+			} else if precLeft < OpCall {
+				p.fail("expression")
+				return nil
 			}
 			p.next()
 			if p.tt == OpenParenToken {

diff --git a/js/parse_test.go b/js/parse_test.go
@@ -590,6 +590,7 @@ func TestParseError(t *testing.T) {
 		{"function*a(){ (yield) => yield }", "unexpected => in expression"},
 		{"function*a(){ (yield=5) => yield }", "unexpected = in expression"},
 		{"function*a(){ (...yield) => yield }", "unexpected => in expression"},
+		{"function*a(){ yield yield\n?.() }", "unexpected ?. in expression"},
 		{"x = await\n=> a++", "unexpected => in expression"},
 		{"x=async (await,", "unexpected , in expression"},
 		{"async function a() { class a extends await", "unexpected await in expression"},