1 files changed, 48 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/optimized-out-03.js b/js/src/jit-test/tests/debug/optimized-out-03.js
new file mode 100644
index 0000000000..7bf757c058
--- /dev/null
+++ b/js/src/jit-test/tests/debug/optimized-out-03.js
@@ -0,0 +1,48 @@
+// Test that eval-in-frame throws on accessing optimized out values.
+
+// Use gczeal 0 to keep CGC from invalidating Ion code and causing test failures.
+gczeal(0);
+
+load(libdir + "jitopts.js");
+
+if (!jitTogglesMatch(Opts_IonEagerNoOffthreadCompilation))
+  quit(0);
+
+withJitOptions(Opts_IonEagerNoOffthreadCompilation, function() {
+  var dbgGlobal = newGlobal({newCompartment: true});
+  var dbg = new dbgGlobal.Debugger();
+  dbg.addDebuggee(this);
+
+  var warmedUp = false;
+  function check() {
+    if (warmedUp) {
+      var a = dbg.getNewestFrame().older.eval("a")
+      assertEq(a.throw.unsafeDereference().toString(),
+               "Error: variable 'a' has been optimized out");
+    }
+  }
+
+  // Test optimized-out binding in function scope.
+  function testFunctionScope() {
+    var a = 1;
+    for (var i = 0; i < 1; i++) { check(); }
+  }
+
+  // Test optimized-out binding in block scope.
+  function testBlockScope() {
+    {
+      let a = 1;
+      for (var i = 0; i < 1; i++) { check(); }
+    }
+  }
+
+  with({}) {}
+
+  testFunctionScope();
+  testBlockScope();
+
+  warmedUp = true;
+
+  testFunctionScope();
+  testBlockScope();
+});