@@ -0,0 +1,18 @@
+function shouldBe(actual, expected) {
+    if (actual !== expected)
+        throw new Error('bad value: ' + actual + ', expected: ' + expected);
+}
+
+// Alternation must prefer the earlier alternative "a", which matches because
+// multiline $ succeeds before the line terminator.
+shouldBe(/^(?:a|a\nx)$/m.exec("a\nx")[0], "a");
+shouldBe(/^(?:a|a\nx)$/m.test("a\nx"), true);
+
+// "a\nb" matches the text but fails $ (next char is "Q"); the later
+// alternative "a" must then be tried and succeeds before the "\n".
+shouldBe(/^(?:a\nb|a)$/m.exec("a\nbQ")[0], "a");
+
+shouldBe(/^(?:foo|bar|f)$/m.exec("foo")[0], "foo");
+shouldBe(/^(?:foo|bar|f)$/m.exec("bar\nzzz")[0], "bar");
+shouldBe(/^(?:foo|bar|f)$/m.exec("f\nbar")[0], "f");
+shouldBe(/^(?:foo|bar|f)$/m.exec("fo"), null);
@@ -2084,7 +2084,7 @@ class YarrPatternConstructor {
                 && terms[1].quantityMaxCount == 1
                 && !terms[1].parentheses.isCopy
                 && (terms.size() == 2
-                    || (terms.size() == 3 && terms[2].type == PatternTerm::Type::AssertionEOL))) {
+                    || (terms.size() == 3 && terms[2].type == PatternTerm::Type::AssertionEOL && !m_pattern.multiline()))) {
                 // We start assuming this is a string list and then prove the negative.
                 isStringList = true;