Blazor Webassembly - Debugger crashes app

[softwaretirol]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

If we start to debug our webassembly project, the app is crashing (With IIS Express or even without..).
The app works perfect if we dont attach the debugger, or if we remove the inspectUri from the launchSettings.json.

Any hints how we can diagnose this problem?

Expected Behavior

Debugger works like expected :-).

Steps To Reproduce

No response

Exceptions (if any)

Microsoft.WebAssembly.Diagnostics.DevToolsProxy[0] DevToolsProxy::Run: Exception System.AggregateException: One or more errors occurred. (Index was out of range. Must be non-negative and less than the size of the collection. (Parameter 'index')) ---> System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection. (Parameter 'index') at System.Collections.Generic.List1.get_Item(Int32 index) at Newtonsoft.Json.Linq.JContainer.GetItem(Int32 index) at Newtonsoft.Json.Linq.JArray.get_Item(Object key) at Microsoft.WebAssembly.Diagnostics.MonoProxy.AcceptEvent(SessionId sessionId, String method, JObject args, CancellationToken token) at Microsoft.WebAssembly.Diagnostics.DevToolsProxy.OnEvent(SessionId sessionId, String method, JObject args, CancellationToken token) --- End of inner exception stack trace --- at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions) at System.Threading.Tasks.Task1.GetResultCore(Boolean waitCompletionNotification) at System.Threading.Tasks.Task1.get_Result() at Microsoft.WebAssembly.Diagnostics.DevToolsProxy.Run(Uri browserUri, WebSocket ideSocket)

.NET Version

6.0.2

Anything else?

No response

[mkArtakMSFT]

Thank you for filing this issue. In order for us to investigate this issue, please provide a minimalistic repro project (ideally a GitHub repo) that illustrates the problem.

[ghost]

Tagging subscribers to this area: @thaystg
See info in area-owners.md if you want to be subscribed.

Issue Details

---

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

If we start to debug our webassembly project, the app is crashing (With IIS Express or even without..).
The app works perfect if we dont attach the debugger, or if we remove the inspectUri from the launchSettings.json.

Any hints how we can diagnose this problem?

Expected Behavior

Debugger works like expected :-).

Steps To Reproduce

No response

Exceptions (if any)

Microsoft.WebAssembly.Diagnostics.DevToolsProxy[0] DevToolsProxy::Run: Exception System.AggregateException: One or more errors occurred. (Index was out of range. Must be non-negative and less than the size of the collection. (Parameter 'index')) ---> System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection. (Parameter 'index') at System.Collections.Generic.List1.get_Item(Int32 index) at Newtonsoft.Json.Linq.JContainer.GetItem(Int32 index) at Newtonsoft.Json.Linq.JArray.get_Item(Object key) at Microsoft.WebAssembly.Diagnostics.MonoProxy.AcceptEvent(SessionId sessionId, String method, JObject args, CancellationToken token) at Microsoft.WebAssembly.Diagnostics.DevToolsProxy.OnEvent(SessionId sessionId, String method, JObject args, CancellationToken token) --- End of inner exception stack trace --- at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions) at System.Threading.Tasks.Task1.GetResultCore(Boolean waitCompletionNotification) at System.Threading.Tasks.Task1.get_Result() at Microsoft.WebAssembly.Diagnostics.DevToolsProxy.Run(Uri browserUri, WebSocket ideSocket)

.NET Version

6.0.2

Anything else?

No response

Author:	softwaretirol
Assignees:	-
Labels:	untriaged, area-Debugger-mono
Milestone:	-

[mkArtakMSFT]

@lewing FYI

[thaystg]

Can you please attach the Log that you can find at:
C:\Users[USER_NAME]\AppData\Local\Temp\visualstudio-js-debugger.txt
Please debug the app and after the application crashes you attach the log here.

Thanks for your help.

[ghost]

This issue has been marked needs-author-action since it may be missing important information. Please refer to our contribution guidelines for tips on how to report issues effectively.

[ghost]

Tagging subscribers to 'arch-wasm': @lewing
See info in area-owners.md if you want to be subscribed.

Issue Details

---

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

If we start to debug our webassembly project, the app is crashing (With IIS Express or even without..).
The app works perfect if we dont attach the debugger, or if we remove the inspectUri from the launchSettings.json.

Any hints how we can diagnose this problem?

Expected Behavior

Debugger works like expected :-).

Steps To Reproduce

No response

Exceptions (if any)

Microsoft.WebAssembly.Diagnostics.DevToolsProxy[0] DevToolsProxy::Run: Exception System.AggregateException: One or more errors occurred. (Index was out of range. Must be non-negative and less than the size of the collection. (Parameter 'index')) ---> System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection. (Parameter 'index') at System.Collections.Generic.List1.get_Item(Int32 index) at Newtonsoft.Json.Linq.JContainer.GetItem(Int32 index) at Newtonsoft.Json.Linq.JArray.get_Item(Object key) at Microsoft.WebAssembly.Diagnostics.MonoProxy.AcceptEvent(SessionId sessionId, String method, JObject args, CancellationToken token) at Microsoft.WebAssembly.Diagnostics.DevToolsProxy.OnEvent(SessionId sessionId, String method, JObject args, CancellationToken token) --- End of inner exception stack trace --- at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions) at System.Threading.Tasks.Task1.GetResultCore(Boolean waitCompletionNotification) at System.Threading.Tasks.Task1.get_Result() at Microsoft.WebAssembly.Diagnostics.DevToolsProxy.Run(Uri browserUri, WebSocket ideSocket)

.NET Version

6.0.2

Anything else?

No response

Author:	softwaretirol
Assignees:	thaystg
Labels:	arch-wasm, untriaged, area-Debugger-mono, needs-author-action
Milestone:	-

[radical]

We could add some error checking to that code, like https://gist.github.com/radical/0cf3dc140068c05f3c2a988ddd9d89c8

[thaystg]

Sure. Do you want to open the PR?

[ghost]

This issue has been automatically marked no-recent-activity because it has not had any activity for 14 days. It will be closed if no further activity occurs within 14 more days. Any new comment (by anyone, not necessarily the author) will remove no-recent-activity.

[ghost]

This issue will now be closed since it had been marked no-recent-activity but received no further activity in the past 14 days. It is still possible to reopen or comment on the issue, but please note that the issue will be locked if it remains inactive for another 30 days.