1 files changed, 16 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/Frame-eval-26.js b/js/src/jit-test/tests/debug/Frame-eval-26.js
new file mode 100644
index 0000000000..5a15c305e8
--- /dev/null
+++ b/js/src/jit-test/tests/debug/Frame-eval-26.js
@@ -0,0 +1,16 @@
+// Bug 1026477: Defining functions with D.F.p.eval works, even if there's
+// already a non-aliased var binding for the identifier.
+
+var g = newGlobal({newCompartment: true});
+var dbg = new Debugger(g);
+dbg.onDebuggerStatement = function (frame) {
+  frame.older.eval('function f() { }');
+};
+
+// When the compiler sees the 'debugger' statement, it marks all variables as
+// aliased, but we want to test the case where f is in a stack frame slot, so we
+// put the 'debugger' statement in a separate function, and use frame.older to
+// get back to the anonymous function's frame.
+g.eval('function q() { debugger; }');
+assertEq(typeof g.eval('(function () { var f = 42; q(); return f; })();'),
+         "function");