Blazor WebAssembly publish bug

[lskyum]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

A published Blazor WebAssembly application doesn't work.
The mono wasm runtime encounters an error and the application simply halts.

Expected Behavior

I expect the Blazor Web App template to run when published. Even without any modification it doesn't work.

Steps To Reproduce

1. Create a new "Blazor Web App" (.NET 9 WebAssembly) (Also happend for .NET 10 Preview)

2. Publish to a folder (All default settings)

3. Run the exe file and open the website in a Browser (Tested with Edge or Firefox)

The issue can be "fixed" by add this to the client project:
<WasmFingerprintAssets>false</WasmFingerprintAssets>

This will however make the published WASM much larger and doesn't seem like a good solution.
In any case the default Blazor Web App should work without such modification.

Exceptions (if any)

[MONO] * Assertion at /__w/1/s/src/mono/mono/metadata/assembly.c:2718, condition `' not met

Fc<@http://localhost:5000/_framework/dotnet.runtime.drv0pr9n5o.js:3:168833
@:wasm-function[158]:0xac91
@:wasm-function[649]:0x43052
@:wasm-function[567]:0x4105b
@:wasm-function[571]:0x4117c
@:wasm-function[573]:0x411bf
@:wasm-function[572]:0x41192
@:wasm-function[157]:0x8cf4
createDotnetRuntime/Module._mono_wasm_load_runtime@http://localhost:5000/_framework/dotnet.native.l4ptthxatg.js:8:114094
Wc/e.onRuntimeInitialized/<@http://localhost:5000/_framework/dotnet.runtime.drv0pr9n5o.js:3:184839
Wc/e.onRuntimeInitialized/<@http://localhost:5000/_framework/dotnet.runtime.drv0pr9n5o.js:3:184967
Wc/e.onRuntimeInitialized/<@http://localhost:5000/_framework/dotnet.runtime.drv0pr9n5o.js:3:188548

.NET Version

10.0.100-rc.2.25502.107 (but the project is .NET 9)

Anything else?

Visual Studio Insiders [11123.170]

[MihuBot]

I'm a bot. Here are possible related and/or duplicate issues (I may be wrong):

• After installing 10.0 RTM, publish 9.0 Blazor WebAssembly app, some errors "MONO_WASM: mono_wasm_load_runtime () failed" appears when go to the Counter page #64049
• There are some errors "MONO_WASM: mono_wasm_load_runtime () failed" when go to the Counter page after publish the Blazor WebAssembly app #63970

[javiercn]

Dupe of #64049