1 files changed, 15 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/Environment-selfhosted-builtins.js b/js/src/jit-test/tests/debug/Environment-selfhosted-builtins.js
new file mode 100644
index 0000000000..1026a486f4
--- /dev/null
+++ b/js/src/jit-test/tests/debug/Environment-selfhosted-builtins.js
@@ -0,0 +1,15 @@
+// The environment of self-hosted builtins is not exposed to the debugger and
+// instead is reported as |undefined| just like native builtins.
+
+let g = newGlobal({newCompartment: true});
+
+let dbg = new Debugger();
+let gw = dbg.addDebuggee(g);
+
+// Array is a known native builtin function.
+let nativeBuiltin = gw.makeDebuggeeValue(g.Array);
+assertEq(nativeBuiltin.environment, undefined);
+
+// Array.prototype[@@iterator] is a known self-hosted builtin function.
+let selfhostedBuiltin = gw.makeDebuggeeValue(g.Array.prototype[Symbol.iterator]);
+assertEq(selfhostedBuiltin.environment, undefined);