1 files changed, 34 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/RegExp/match-indices/indices-array-unmatched.js b/js/src/tests/test262/built-ins/RegExp/match-indices/indices-array-unmatched.js
new file mode 100644
index 0000000000..43c18f69e3
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+++ b/js/src/tests/test262/built-ins/RegExp/match-indices/indices-array-unmatched.js
@@ -0,0 +1,34 @@
+// Copyright 2019 Ron Buckton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: An unmatched capture in a match corresponds to an unmatched capture in "indices"
+esid: sec-makeindicesarray
+features: [regexp-match-indices]
+info: |
+  MakeIndicesArray ( S, indices, groupNames )
+    4. Let _n_ be the number of elements in _indices_.
+    ...
+    6. Set _A_ to ! ArrayCreate(_n_).
+    ...
+    11. For each integer _i_ such that _i_ >= 0 and _i_ < _n_, do
+      a. Let _matchIndices_ be _indices_[_i_].
+      b. If _matchIndices_ is not *undefined*, then
+        i. Let _matchIndicesArray_ be ! GetMatchIndicesArray(_S_, _matchIndices_).
+      c. Else,
+        i. Let _matchIndicesArray_ be *undefined*.
+      d. Perform ! CreateDataProperty(_A_, ! ToString(_n_), _matchIndicesArray_).
+        ...
+---*/
+
+let input = "abd";
+let match = /b(c)?/d.exec(input);
+let indices = match.indices;
+
+// `indices` has the same length as match
+assert.sameValue(indices.length, match.length);
+
+// The second element of `indices` should be undefined.
+assert.sameValue(indices[1], undefined);
+
+reportCompare(0, 0);