michael@0: // Test the corner case of accessing an unaliased variable of a block
michael@0: // while the block is not live.
michael@0: 
michael@0: var g = newGlobal();
michael@0: g.eval("function h() { debugger }");
michael@0: g.eval("function f() { let (x = 1, y) { (function() { y = 0 })(); h() } }");
michael@0: g.eval("var surprise = null");
michael@0: 
michael@0: var dbg = new Debugger(g);
michael@0: dbg.onDebuggerStatement = function(hFrame) {
michael@0:     var fFrame = hFrame.older;
michael@0:     assertEq(fFrame.environment.getVariable('x'), 1);
michael@0:     assertEq(fFrame.environment.getVariable('y'), 0);
michael@0:     fFrame.eval("surprise = function() { return ++x }");
michael@0:     assertEq(g.surprise(), 2);
michael@0: }
michael@0: g.f();
michael@0: assertEq(g.surprise !== null, true);
michael@0: 
michael@0: // Either succeed or throw an error about 'x' not being live
michael@0: try {
michael@0:     assertEq(g.surprise(), 3);
michael@0: } catch (e) {
michael@0:     assertEq(e+'', 'Error: x is not live');
michael@0: }