1 files changed, 35 insertions, 0 deletions
diff --git a/js/src/tests/test262/annexB/language/eval-code/direct/script-decl-lex-no-collision.js b/js/src/tests/test262/annexB/language/eval-code/direct/script-decl-lex-no-collision.js
new file mode 100644
index 0000000000..643b11831d
--- /dev/null
+++ b/js/src/tests/test262/annexB/language/eval-code/direct/script-decl-lex-no-collision.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2023 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-globaldeclarationinstantiation
+description: No let binding collision with existing var declaration due to eval().
+info: |
+  In strict mode:
+
+  PerformEval ( x, strictCaller, direct )
+
+  [...]
+  16. If direct is true, then
+    a. Let lexEnv be NewDeclarativeEnvironment(runningContext's LexicalEnvironment).
+  [...]
+  18. If strictEval is true, set varEnv to lexEnv.
+
+  In sloppy mode:
+
+  GlobalDeclarationInstantiation ( script, env )
+
+  [...]
+  3. For each element name of lexNames, do
+    a. If env.HasLexicalDeclaration(name) is true, throw a SyntaxError exception.
+    b. Let hasRestrictedGlobal be ? env.HasRestrictedGlobalProperty(name).
+    c. NOTE: Global var and function bindings (except those that are introduced by non-strict direct eval) are non-configurable and are therefore restricted global properties.
+    d. If hasRestrictedGlobal is true, throw a SyntaxError exception.
+---*/
+
+eval('if (true) { function test262Fn() {} }');
+
+$262.evalScript('let test262Fn = 1;');
+
+assert.sameValue(test262Fn, 1);
+
+reportCompare(0, 0);