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[2020-02] [System.Runtime.Serialization] Work around specified cast is not valid #19640

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akoeplinger merged 1 commit into from
Apr 24, 2020
Merged

[2020-02] [System.Runtime.Serialization] Work around specified cast is not valid #19640

akoeplinger merged 1 commit into from
Apr 24, 2020

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@monojenkins
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@monojenkins monojenkins commented Apr 23, 2020

Fixes #19466

It was discovered that the specified cast is not valid was being thrown because of an attempt to cast an object of type ResourceType as XmlDictionaryString. However, ResourceType is of type Enum, so instead a check for type XmlDictionaryString is performed before resorting to getting the object's name via ToString().

To test code changes, I needed to side install msbuild into my mono install via
make -j in <msbuild_repo>
<msbuild_repo>/install-mono-prefix.sh <local-mono-install>
And then in the Wasm project directory
<local-mono-install>/bin/msbuild Wasm.csproj

Steps to reproduce:

$ dotnet new -i Microsoft.AspNetCore.Components.WebAssembly.Templates::3.2.0-preview3.20168.3
$ dotnet new blazorwasm -o Wasm
$ cd Wasm
$ msbuild Wasm.csproj

output before

"/Users/mdhwang/Wasm/Wasm.csproj" (default target) (1) ->
(_GenerateBlazorBootJson target) ->
  /Users/mdhwang/.nuget/packages/microsoft.aspnetcore.components.webassembly.build/3.2.0-preview3.20168.3/targets/Blazor.MonoRuntime.targets(348,5): error : Specified cast is not valid. [/Users/mdhwang/Wasm/Wasm.csproj]

    0 Warning(s)
    1 Error(s)

Output after code changes

Wasm (Blazor output) -> /Users/mdhwang/Wasm/bin/Debug/netstandard2.1/wwwroot
Done Building Project "/Users/mdhwang/Wasm/Wasm.csproj" (default targets).

Build succeeded.
    0 Warning(s)
    0 Error(s)

Backport of #19620.

/cc @steveisok @mdh1418

@monojenkins monojenkins added this to the 2020-02 (6.12.xx) milestone Apr 23, 2020
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akoeplinger commented Apr 23, 2020

@monojenkins build failed

@akoeplinger akoeplinger merged commit 83558de into mono:2020-02 Apr 24, 2020
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@akoeplinger akoeplinger akoeplinger approved these changes

@steveisok steveisok Awaiting requested review from steveisok

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@monojenkins @akoeplinger @mdh1418