blazor: Assertion at /__w/1/s/src/mono/mono/metadata/assembly.c:1374

[weibaohui]

Web Browse:
Assertion at /__w/1/s/src/mono/mono/metadata/assembly.c:1374, condition `' not met 6.0.0-preview.5.21301.17

C# Code

public partial class FetchData:ComponentBase
    {
         WeatherForecast[] forecasts;
        [Inject]
        private HttpClient Http  { get; set; }

        protected override async Task  OnInitializedAsync()
        {
            forecasts = await Http.GetFromJsonAsync<WeatherForecast[]>("https://localhost:4001/WeatherForecast");
        }
}

using netcore 6.0.0-preview.5.21301.17

[ghost]

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

Issue Details

---

Web Browse:
Assertion at /__w/1/s/src/mono/mono/metadata/assembly.c:1374, condition `' not met

C# Code
public partial class FetchData:ComponentBase
{
WeatherForecast[] forecasts;
[Inject]
private HttpClient Http { get; set; }

    protected override async Task  OnInitializedAsync()
    {
        forecasts = await Http.GetFromJsonAsync<WeatherForecast[]>("https://localhost:4001/WeatherForecast");
    }

}

Author:	weibaohui
Assignees:	-
Labels:	area-System.Net.Http, untriaged
Milestone:	-

[ghost]

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

Issue Details

---

Web Browse:
Assertion at /__w/1/s/src/mono/mono/metadata/assembly.c:1374, condition `' not met 6.0.0-preview.5.21301.17

C# Code
public partial class FetchData:ComponentBase
{
WeatherForecast[] forecasts;
[Inject]
private HttpClient Http { get; set; }

    protected override async Task  OnInitializedAsync()
    {
        forecasts = await Http.GetFromJsonAsync<WeatherForecast[]>("https://localhost:4001/WeatherForecast");
    }

}

using netcore 6.0.0-preview.5.21301.17

Author:	weibaohui
Assignees:	-
Labels:	arch-wasm, area-System.Net.Http, untriaged
Milestone:	-

[pavelsavara]

I was not able to reproduce it with simple unit test

It seems to me that it's trying to load some assembly and the callback/hook failed. See

runtime/src/mono/mono/metadata/assembly.c

Line 1374 in 3782e6e

mono_error_assert_ok (hook_error); /* FIXME: proper error handling */

This is not network related issue in my opinion.

@weibaohui, could you please share more complete stack trace ?
Also information on what callback or what library was loaded if you could get it. Thanks!

[pavelsavara]

@steveisok @akoeplinger what would be proper error handling for the assembly load hook failure ? Should we throw exception to user code ?
What would be the WASM scenario under which this could happen ?
Since we don't have the stack trace, my guess is corrupt/incomplete/missing assembly download. Or maybe corrupt preview AOT image ?
But I don't understand the workflow here yet. Does assembly download happen in the hook ? Or it was already in memory and valid when the hooks are triggered ?

[ghost]

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

Issue Details

---

Web Browse:
Assertion at /__w/1/s/src/mono/mono/metadata/assembly.c:1374, condition `' not met 6.0.0-preview.5.21301.17

C# Code

public partial class FetchData:ComponentBase
    {
         WeatherForecast[] forecasts;
        [Inject]
        private HttpClient Http  { get; set; }

        protected override async Task  OnInitializedAsync()
        {
            forecasts = await Http.GetFromJsonAsync<WeatherForecast[]>("https://localhost:4001/WeatherForecast");
        }
}

using netcore 6.0.0-preview.5.21301.17

Author:	weibaohui
Assignees:	pavelsavara
Labels:	arch-wasm, area-VM-meta-mono
Milestone:	6.0.0

[lambdageek]

I'm assuming this is using dotnet watch. If so, this is a duplicate of dotnet/aspnetcore#33152. The workaround was in dotnet/aspnetcore#33263 in .net 6 preview 6. A fix of the underlying issue in Mono is in #55202 and will be in .net 6 preview 7

[ghost]

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

Issue Details

---

Web Browse:
Assertion at /__w/1/s/src/mono/mono/metadata/assembly.c:1374, condition `' not met 6.0.0-preview.5.21301.17

C# Code

public partial class FetchData:ComponentBase
    {
         WeatherForecast[] forecasts;
        [Inject]
        private HttpClient Http  { get; set; }

        protected override async Task  OnInitializedAsync()
        {
            forecasts = await Http.GetFromJsonAsync<WeatherForecast[]>("https://localhost:4001/WeatherForecast");
        }
}

using netcore 6.0.0-preview.5.21301.17

Author:	weibaohui
Assignees:	pavelsavara
Labels:	arch-wasm, area-AssemblyLoader-mono
Milestone:	6.0.0

[pavelsavara]

@lambdageek could this be closed now ?