bug2013588.js - mozsearch

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// |jit-test| skip-if: !wasmDebuggingEnabled()

// Bug 2013588 - Accessing a saved wasm Debugger.Environment after the frame is

// popped must not crash.

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

var dbg = new Debugger(g);

g.wasmBytes = wasmTextToBinary(`(module

  (func (export "f") (param i32) (result i32)

    local.get 0

)`);

var savedEnv = null;

dbg.onEnterFrame = function(frame) {

  if (frame.type === "wasmcall") {

    savedEnv = frame.environment;

};

g.eval(`

  var inst = new WebAssembly.Instance(new WebAssembly.Module(wasmBytes));

  inst.exports.f(42);

  inst = null;

`);

assertEq(savedEnv !== null, true);

assertEq(savedEnv.getVariable("var0").optimizedOut, true);