PostSharedBufferToScript stops after about 32000x1MB buffers are posted

[ronen37]

Description
I have modified ScenarioSharedBuffer in WebView2APISample so when the script receives a shared buffer, it releases the received buffer and requests a new 1MB shared buffer indefinitely.
It stops after about 32000x1MB buffers are posted, without any error messages or exception indication.

Version
SDK: WebView2.1.0.1724-prerelease
Runtime: Canary 113.0.1774.0
Framework: Win32
OS: Win10

Repro Steps

Use the ScenarioSharedBuffer.cpp and ScenarioSharedBuffer.html files in the zip file:
ScenarioSharedBuffer.zip

Run WebView2APISample.exe and select "Scenario"->"Shared Buffer"

Click on "Show data in shared buffer"

Expected behavior: totalSizeOfBuffers should increase indefinitely
Actual behavior: totalSizeOfBuffers stops at 32760000000

Screenshots

Additional context

AB#44152838

[mmiyano]

I'm probably having the same problem.
My sample code is here (modifed only ScenarioSharedBuffer.cpp and html from original):
https://github.com/mmiyano/WebView2Samples/tree/test/crash_by_shared_buffer

To run my code, press "Start sending large data" button in shared buffer scenario page.
Webview2 crashes when transfer reaches 33,882,931,200 bytes (received data count is 27574).

[novac42]

Thanks for reporting the issue. I've assigned this to a dev that can help follow up on this.

[LiangTheDev]

I can repro it. I've created an internal tracking item for this issue and will investigate.

[LiangTheDev]

This should be fixed is in Edge version >= 114.0.1802.0. You can test it with Edge Canary build:

• Install Edge Canary from https://www.microsoftedgeinsider.com/en-us/download/canary
• Set environment variable WEBVIEW2_RELEASE_CHANNEL_PREFERENCE as 1 for the user
• Run the app