1 files changed, 38 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/semantics/scripting-1/the-script-element/module/choice-of-error-3.html b/testing/web-platform/tests/html/semantics/scripting-1/the-script-element/module/choice-of-error-3.html
new file mode 100644
index 0000000000..bc52119bfe
--- /dev/null
+++ b/testing/web-platform/tests/html/semantics/scripting-1/the-script-element/module/choice-of-error-3.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<title>Choice of evaluation errors</title>
+
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+    setup({allow_uncaught_exception: true});
+
+    window.log = [];
+
+    window.addEventListener("error", ev => log.push(ev.error));
+    window.addEventListener("onunhandledrejection", unreachable);
+
+    const test_load = async_test(
+        "Evaluation errors are cached in intermediate module scripts");
+    window.addEventListener("load", test_load.step_func_done(ev => {
+      assert_equals(log.length, 5);
+
+      // Evaluation errors, unlike parse/instantiation errors, are remembered
+      // and cached in module scripts between the root and the script that
+      // caused an evaluation error, and thus the same evaluation error
+      // is reported for both <script> elements.
+      assert_equals(log[0], "throw2");
+      assert_true(log[1].bar);
+      assert_equals(log[2], 1);
+
+      assert_true(log[3].bar);
+      assert_equals(log[4], 2);
+
+      assert_equals(log[1], log[3], 'evaluation errors must be the same');
+    }));
+
+    function unreachable() { log.push("unexpected"); }
+</script>
+<script type="module" src="./choice-of-error-3a.js"
+    onerror="unreachable()" onload="log.push(1)"></script>
+<script type="module" src="./choice-of-error-3b.js"
+    onerror="unreachable()" onload="log.push(2)"></script>