MicrosoftEdge / MicrosoftEdge/WebView2Feedback
[Problem/Bug]: Program crashes when calling host object
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Since Jun 16, 2025.
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Description
What happened?
The program crashed when an array was passed into the parameter to call the host object and return the parameter.
Importance
Blocking. My app's basic functions are not working due to this issue.
Runtime Channel
Stable release (WebView2 Runtime)
Runtime Version
131.0.2903.112
SDK Version
1.0.2903.40
Framework
Win32
Operating System
Windows 11
OS Version
No response
Repro steps
Create CoreWebView2 on the host side, add the host object fn through AddHostObjectToScript, and the object will return the passed-in parameters as they are, then OpenDevToolsWindow, run the code on the console.
This is a simple ahk implementation.
; https://github.com/thqby/ahk2_lib
#Include <WebView2\WebView2>
g := Gui()
g.Show('w800 h600')
wvc := WebView2.create(g.Hwnd)
cwv := wvc.CoreWebView2
cwv.AddHostObjectToScript('fn', v => v)
cwv.OpenDevToolsWindow()
await chrome.webview.hostObjects.fn(123) // 123
await chrome.webview.hostObjects.fn('abc') // 'abc'
await chrome.webview.hostObjects.fn({a:1,b:2}) // {a:1,b:2}
await chrome.webview.hostObjects.fn({a:[12,34]}) // {a:[12,34]}
await chrome.webview.hostObjects.fn(Promise.resolve(0)) // {}, the return value is different from the incoming value.
await chrome.webview.hostObjects.fn(new Map()) // {}, the return value is different from the incoming value.
await chrome.webview.hostObjects.fn([12,34]]) // [null,null], after a few seconds, the program crashed.
Repros in Edge Browser
No, issue does not reproduce in the corresponding Edge version
Regression
Don't know
Last working version (if regression)
No response
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Assessment
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