Frame-eval-14.js - mozsearch

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// Test the corner case of accessing an unaliased variable of a block

// while the block is not live.

var g = newGlobal({newCompartment: true});

g.eval("function h() { debugger }");

g.eval("function f() { { let x = 1, y; (function() { y = 0 })(); h() } }");

g.eval("var surprise = null");

var dbg = new Debugger;

var gw = dbg.addDebuggee(g);

dbg.onDebuggerStatement = function(hFrame) {

    var fFrame = hFrame.older;

    assertEq(fFrame.environment.getVariable('x'), 1);

    assertEq(fFrame.environment.getVariable('y'), 0);

    fFrame.eval("surprise = function() { return ++x }");

    assertEq(gw.executeInGlobal("surprise()").return, 2);

g.f();

assertEq(g.surprise !== null, true);

// Either succeed or throw an error about 'x' not being live

try {

    assertEq(g.surprise(), 3);

} catch (e) {

    assertEq(e+'', 'Error: x is not live');