asm.js modules can only be executed once with asm.js optimizations enabled

Fixed Issue #4473068


Sep 3, 2015
This issue is public.
Reported by 0 people

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Steps to reproduce


Repro Steps:

  1. Open Edge on build 10532
  2. go to
  3. “Hello, world!” appears only once

Note this seems to occur on 10240 also with the asm.js optimizations enabled.

Opening the F12 dev tools re-disables asm.js optimizations, so not sure if there’s anything going into the console that I can’t see.

Expected Results:

An asm.js module, like any other JavaScript function, should be able to execute multiple times. In the test case you should see “Hello, world!” appear ten times.

Actual Results:

Dev Channel specific:



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    Comments and activity

    • Microsoft Edge Team

      Changed Assigned To to “Rico M.”

      Changed Assigned To from “Rico M.” to “Justin R.”

      Changed Status to “Confirmed”

      Changed Assigned To to “ChakraTriage”

      Changed Assigned To from “ChakraTriage” to “Louis L.”

      Changed Assigned To from “Louis L.” to “Michael H.”

      Changed Status from “Confirmed” to “In code review”

      Changed Status from “In code review” to “In progress”

      Changed Assigned To from “Michael H.” to “IE S.”

      Changed Status from “In progress” to “Fixed”

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