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Fix missing entry point exception with Amazon.Lambda.TestTool #2251

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Fix missing entry point exception with Amazon.Lambda.TestTool #2251

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d9c45e0
Fix issue https://github.com/aws/integrations-on-dotnet-aspire-for-aw…
normj Jan 10, 2026
c2c8be8
Revert project versions back to the current released version number
normj Jan 10, 2026
566c36c
Remove redundant OutputType
normj Jan 12, 2026
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25 changes: 25 additions & 0 deletions .autover/changes/9ea31abe-8afa-4b3f-9145-addeec1e94ab.json
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@@ -0,0 +1,25 @@
{
"Projects": [
{
"Name": "Amazon.Lambda.RuntimeSupport",
"Type": "Patch",
"ChangelogMessages": [
"Fixed missing entry point exception when used via Amazon.Lambda.TestTool for a class library based Lambda function that is also an executable with a dependency on Amazon.Lambda.RuntimeSupport."
]
},
{
"Name": "Amazon.Lambda.TestTool",
"Type": "Patch",
"ChangelogMessages": [
"Update to include version 1.14.2 of Amazon.Lambda.RuntimeSupport"
]
},
{
"Name": "Amazon.Lambda.AspNetCoreServer.Hosting",
"Type": "Patch",
"ChangelogMessages": [
"Update to include version 1.14.2 of Amazon.Lambda.RuntimeSupport"
]
}
]
}
4 changes: 2 additions & 2 deletions LambdaRuntimeDockerfiles/Images/net10/amd64/Dockerfile
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Expand Up @@ -35,11 +35,11 @@ COPY ["Libraries/src/Amazon.Lambda.Core", "Repo/Libraries/src/Amazon.Lambda.Core
COPY ["buildtools/", "Repo/buildtools/"]
RUN dotnet restore "Repo/Libraries/src/Amazon.Lambda.RuntimeSupport/Amazon.Lambda.RuntimeSupport.csproj" /p:TargetFrameworks=net10.0
WORKDIR "Repo/Libraries/src/Amazon.Lambda.RuntimeSupport"
RUN dotnet build "Amazon.Lambda.RuntimeSupport.csproj" /p:ExecutableOutputType=true /p:GenerateDocumentationFile=false /p:TargetFrameworks=net10.0 --runtime linux-x64 -c Release -o /app/build
RUN dotnet build "Amazon.Lambda.RuntimeSupport.csproj" /p:GenerateDocumentationFile=false /p:TargetFrameworks=net10.0 --runtime linux-x64 -c Release -o /app/build


FROM builder AS publish
RUN dotnet publish "Amazon.Lambda.RuntimeSupport.csproj" /p:ExecutableOutputType=true /p:GenerateDocumentationFile=false /p:TargetFrameworks=net10.0 -f net10.0 --runtime linux-x64 --self-contained false -p:PublishReadyToRun=true -c Release -o /app/publish
RUN dotnet publish "Amazon.Lambda.RuntimeSupport.csproj" /p:GenerateDocumentationFile=false /p:TargetFrameworks=net10.0 -f net10.0 --runtime linux-x64 --self-contained false -p:PublishReadyToRun=true -c Release -o /app/publish
RUN apt-get update && apt-get install -y dos2unix
RUN dos2unix /app/publish/bootstrap.sh && \
mv /app/publish/bootstrap.sh /app/publish/bootstrap && \
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4 changes: 2 additions & 2 deletions LambdaRuntimeDockerfiles/Images/net10/arm64/Dockerfile
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Expand Up @@ -35,11 +35,11 @@ COPY ["Libraries/src/Amazon.Lambda.Core", "Repo/Libraries/src/Amazon.Lambda.Core
COPY ["buildtools/", "Repo/buildtools/"]
RUN dotnet restore "Repo/Libraries/src/Amazon.Lambda.RuntimeSupport/Amazon.Lambda.RuntimeSupport.csproj" /p:TargetFrameworks=net10.0
WORKDIR "Repo/Libraries/src/Amazon.Lambda.RuntimeSupport"
RUN dotnet build "Amazon.Lambda.RuntimeSupport.csproj" /p:ExecutableOutputType=true /p:GenerateDocumentationFile=false /p:TargetFrameworks=net10.0 --runtime linux-arm64 -c Release -o /app/build
RUN dotnet build "Amazon.Lambda.RuntimeSupport.csproj" /p:GenerateDocumentationFile=false /p:TargetFrameworks=net10.0 --runtime linux-arm64 -c Release -o /app/build


FROM builder AS publish
RUN dotnet publish "Amazon.Lambda.RuntimeSupport.csproj" /p:ExecutableOutputType=true /p:GenerateDocumentationFile=false /p:TargetFrameworks=net10.0 -f net10.0 --runtime linux-arm64 --self-contained false -p:PublishReadyToRun=true -c Release -o /app/publish
RUN dotnet publish "Amazon.Lambda.RuntimeSupport.csproj" /p:GenerateDocumentationFile=false /p:TargetFrameworks=net10.0 -f net10.0 --runtime linux-arm64 --self-contained false -p:PublishReadyToRun=true -c Release -o /app/publish
RUN apt-get update && apt-get install -y dos2unix
RUN dos2unix /app/publish/bootstrap.sh && \
mv /app/publish/bootstrap.sh /app/publish/bootstrap && \
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4 changes: 2 additions & 2 deletions LambdaRuntimeDockerfiles/Images/net8/amd64/Dockerfile
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Expand Up @@ -36,11 +36,11 @@ COPY ["Libraries/src/SnapshotRestore.Registry", "Repo/Libraries/src/SnapshotRest
COPY ["buildtools/", "Repo/buildtools/"]
RUN dotnet restore "Repo/Libraries/src/Amazon.Lambda.RuntimeSupport/Amazon.Lambda.RuntimeSupport.csproj" /p:TargetFrameworks=net8.0
WORKDIR "Repo/Libraries/src/Amazon.Lambda.RuntimeSupport"
RUN dotnet build "Amazon.Lambda.RuntimeSupport.csproj" /p:ExecutableOutputType=true /p:GenerateDocumentationFile=false /p:TargetFrameworks=net8.0 --runtime linux-x64 -c Release -o /app/build
RUN dotnet build "Amazon.Lambda.RuntimeSupport.csproj" /p:GenerateDocumentationFile=false /p:TargetFrameworks=net8.0 --runtime linux-x64 -c Release -o /app/build


FROM builder AS publish
RUN dotnet publish "Amazon.Lambda.RuntimeSupport.csproj" /p:ExecutableOutputType=true /p:GenerateDocumentationFile=false /p:TargetFrameworks=net8.0 -f net8.0 --runtime linux-x64 --self-contained false -p:PublishReadyToRun=true -c Release -o /app/publish
RUN dotnet publish "Amazon.Lambda.RuntimeSupport.csproj" /p:GenerateDocumentationFile=false /p:TargetFrameworks=net8.0 -f net8.0 --runtime linux-x64 --self-contained false -p:PublishReadyToRun=true -c Release -o /app/publish
RUN apt-get update && apt-get install -y dos2unix
RUN dos2unix /app/publish/bootstrap.net8.sh && \
mv /app/publish/bootstrap.net8.sh /app/publish/bootstrap && \
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4 changes: 2 additions & 2 deletions LambdaRuntimeDockerfiles/Images/net8/arm64/Dockerfile
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Expand Up @@ -36,11 +36,11 @@ COPY ["Libraries/src/SnapshotRestore.Registry", "Repo/Libraries/src/SnapshotRest
COPY ["buildtools/", "Repo/buildtools/"]
RUN dotnet restore "Repo/Libraries/src/Amazon.Lambda.RuntimeSupport/Amazon.Lambda.RuntimeSupport.csproj" /p:TargetFrameworks=net8.0
WORKDIR "Repo/Libraries/src/Amazon.Lambda.RuntimeSupport"
RUN dotnet build "Amazon.Lambda.RuntimeSupport.csproj" /p:ExecutableOutputType=true /p:GenerateDocumentationFile=false /p:TargetFrameworks=net8.0 --runtime linux-arm64 -c Release -o /app/build
RUN dotnet build "Amazon.Lambda.RuntimeSupport.csproj" /p:GenerateDocumentationFile=false /p:TargetFrameworks=net8.0 --runtime linux-arm64 -c Release -o /app/build


FROM builder AS publish
RUN dotnet publish "Amazon.Lambda.RuntimeSupport.csproj" /p:ExecutableOutputType=true /p:GenerateDocumentationFile=false /p:TargetFrameworks=net8.0 -f net8.0 --runtime linux-arm64 --self-contained false -p:PublishReadyToRun=true -c Release -o /app/publish
RUN dotnet publish "Amazon.Lambda.RuntimeSupport.csproj" /p:GenerateDocumentationFile=false /p:TargetFrameworks=net8.0 -f net8.0 --runtime linux-arm64 --self-contained false -p:PublishReadyToRun=true -c Release -o /app/publish
RUN apt-get update && apt-get install -y dos2unix
RUN dos2unix /app/publish/bootstrap.net8.sh && \
mv /app/publish/bootstrap.net8.sh /app/publish/bootstrap && \
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4 changes: 2 additions & 2 deletions LambdaRuntimeDockerfiles/Images/net9/amd64/Dockerfile
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Expand Up @@ -35,11 +35,11 @@ COPY ["Libraries/src/Amazon.Lambda.Core", "Repo/Libraries/src/Amazon.Lambda.Core
COPY ["buildtools/", "Repo/buildtools/"]
RUN dotnet restore "Repo/Libraries/src/Amazon.Lambda.RuntimeSupport/Amazon.Lambda.RuntimeSupport.csproj" /p:TargetFrameworks=net9.0
WORKDIR "Repo/Libraries/src/Amazon.Lambda.RuntimeSupport"
RUN dotnet build "Amazon.Lambda.RuntimeSupport.csproj" /p:ExecutableOutputType=true /p:GenerateDocumentationFile=false /p:TargetFrameworks=net9.0 --runtime linux-x64 -c Release -o /app/build
RUN dotnet build "Amazon.Lambda.RuntimeSupport.csproj" /p:GenerateDocumentationFile=false /p:TargetFrameworks=net9.0 --runtime linux-x64 -c Release -o /app/build


FROM builder AS publish
RUN dotnet publish "Amazon.Lambda.RuntimeSupport.csproj" /p:ExecutableOutputType=true /p:GenerateDocumentationFile=false /p:TargetFrameworks=net9.0 -f net9.0 --runtime linux-x64 --self-contained false -p:PublishReadyToRun=true -c Release -o /app/publish
RUN dotnet publish "Amazon.Lambda.RuntimeSupport.csproj" /p:GenerateDocumentationFile=false /p:TargetFrameworks=net9.0 -f net9.0 --runtime linux-x64 --self-contained false -p:PublishReadyToRun=true -c Release -o /app/publish
RUN apt-get update && apt-get install -y dos2unix
RUN dos2unix /app/publish/bootstrap.net8.sh && \
mv /app/publish/bootstrap.net8.sh /app/publish/bootstrap && \
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4 changes: 2 additions & 2 deletions LambdaRuntimeDockerfiles/Images/net9/arm64/Dockerfile
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Expand Up @@ -35,11 +35,11 @@ COPY ["Libraries/src/Amazon.Lambda.Core", "Repo/Libraries/src/Amazon.Lambda.Core
COPY ["buildtools/", "Repo/buildtools/"]
RUN dotnet restore "Repo/Libraries/src/Amazon.Lambda.RuntimeSupport/Amazon.Lambda.RuntimeSupport.csproj" /p:TargetFrameworks=net9.0
WORKDIR "Repo/Libraries/src/Amazon.Lambda.RuntimeSupport"
RUN dotnet build "Amazon.Lambda.RuntimeSupport.csproj" /p:ExecutableOutputType=true /p:GenerateDocumentationFile=false /p:TargetFrameworks=net9.0 --runtime linux-arm64 -c Release -o /app/build
RUN dotnet build "Amazon.Lambda.RuntimeSupport.csproj" /p:GenerateDocumentationFile=false /p:TargetFrameworks=net9.0 --runtime linux-arm64 -c Release -o /app/build


FROM builder AS publish
RUN dotnet publish "Amazon.Lambda.RuntimeSupport.csproj" /p:ExecutableOutputType=true /p:GenerateDocumentationFile=false /p:TargetFrameworks=net9.0 -f net9.0 --runtime linux-arm64 --self-contained false -p:PublishReadyToRun=true -c Release -o /app/publish
RUN dotnet publish "Amazon.Lambda.RuntimeSupport.csproj" /p:GenerateDocumentationFile=false /p:TargetFrameworks=net9.0 -f net9.0 --runtime linux-arm64 --self-contained false -p:PublishReadyToRun=true -c Release -o /app/publish
RUN apt-get update && apt-get install -y dos2unix
RUN dos2unix /app/publish/bootstrap.net8.sh && \
mv /app/publish/bootstrap.net8.sh /app/publish/bootstrap && \
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12 changes: 9 additions & 3 deletions Libraries/src/Amazon.Lambda.RuntimeSupport/Amazon.Lambda.RuntimeSupport.csproj
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Expand Up @@ -22,11 +22,17 @@
ready to make a major version release of our libraries.
-->
<CheckEolTargetFramework>false</CheckEolTargetFramework>
</PropertyGroup>

<PropertyGroup Condition=" '$(ExecutableOutputType)'=='true' ">
<!--
Build as a executable which is required for the managed runtime and when used via Amazon.Lambda.TestTool for
testing class library based Lambda functions. Letting it be built as a executable even for the executable
programming model where it is used as a library. This is because it is possible a user might have a
executable project that also has some class library like style functions. In that scenario Amazon.Lambda.RuntimeSupport
would come from project instead of Amazon.Lambda.TestTool when testing. If we didn't compile as a executable
the user gets a missing entry point exception.
https://github.com/aws/integrations-on-dotnet-aspire-for-aws/issues/138
-->
<OutputType>Exe</OutputType>
<DefineConstants>$(DefineConstants);ExecutableOutputType</DefineConstants>
</PropertyGroup>

<PropertyGroup Condition="'$(TargetFramework)' == 'net8.0' or '$(TargetFramework)' == 'net9.0' or '$(TargetFramework)' == 'net10.0'">
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2 changes: 0 additions & 2 deletions Libraries/src/Amazon.Lambda.RuntimeSupport/Program.cs
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Expand Up @@ -28,7 +28,6 @@ class Program
// .NET 10 considers adding RequiresUnreferencedCode on the entry point a warning. Our situation is different then the normal use case in that the only time
// the Main exists in the Lambda class library mode which will never be used for Native AOT.
#pragma warning disable IL2123
#if ExecutableOutputType
#if NET8_0_OR_GREATER
[System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode(
"The Main entry point is used in the managed runtime which loads Lambda functions as a class library. " +
Expand All @@ -50,7 +49,6 @@ private static async Task Main(string[] args)
RuntimeSupportInitializer runtimeSupportInitializer = new RuntimeSupportInitializer(handler, lambdaBootstrapOptions);
await runtimeSupportInitializer.RunLambdaBootstrap();
}
#endif
#pragma warning restore IL2123

#if NET8_0_OR_GREATER
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4 changes: 2 additions & 2 deletions Tools/LambdaTestTool-v2/src/Amazon.Lambda.TestTool/Amazon.Lambda.TestTool.csproj
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Expand Up @@ -15,7 +15,7 @@
<PackAsTool>true</PackAsTool>
<PackageId>Amazon.Lambda.TestTool</PackageId>
<ToolCommandName>dotnet-lambda-test-tool</ToolCommandName>
<Version>0.11.1</Version>
<Version>0.11.0</Version>
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@philasmar philasmar Jan 12, 2026

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Why are you doing a version downgrade?

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Copilot AI Jan 12, 2026

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The version is being downgraded from 0.11.1 to 0.11.0, which is unusual for a bug fix. The .autover changelog indicates this is a Patch release which would typically increment the patch version. Consider whether this version change is intentional or if it should be incremented instead.

Suggested change
<Version>0.11.0</Version>
<Version>0.11.2</Version>

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<NoWarn>NU5100</NoWarn>
<RollForward>Major</RollForward>
<PackageReadmeFile>README.md</PackageReadmeFile>
Expand Down Expand Up @@ -47,7 +47,7 @@
</Target>

<Target Name="PublishRuntimeSupportFiles" DependsOnTargets="GetRuntimeSupportTargetFrameworks" BeforeTargets="Build">
<Exec Command="dotnet publish &quot;$(MSBuildThisFileDirectory)../../../../Libraries/src/Amazon.Lambda.RuntimeSupport/Amazon.Lambda.RuntimeSupport.csproj&quot; -c $(Configuration) -f %(TargetFrameworks.Identity) /p:ExecutableOutputType=true" />
<Exec Command="dotnet publish &quot;$(MSBuildThisFileDirectory)../../../../Libraries/src/Amazon.Lambda.RuntimeSupport/Amazon.Lambda.RuntimeSupport.csproj&quot; -c $(Configuration) -f %(TargetFrameworks.Identity)" />
</Target>

<Target Name="CopyRuntimeSupportFiles" DependsOnTargets="GetRuntimeSupportTargetFrameworks" BeforeTargets="_GetPackageFiles">
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1 change: 0 additions & 1 deletion buildtools/build.proj
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Expand Up @@ -170,7 +170,6 @@
<Target Name="build-lambda-test-tool-package" DependsOnTargets="init">
<Exec Command="dotnet msbuild aws-lambda-test-tool-netcore.sln /t:Rebuild /p:Configuration=$(Configuration) /p:AssemblyOriginatorKeyFile=$(AssemblyOriginatorKeyFile) /p:SignAssembly=$(SignAssembly)" WorkingDirectory="..\Tools\LambdaTestTool"/>
<Exec Command="$(PackCommand) Amazon.Lambda.TestTool.BlazorTester60-pack.csproj" WorkingDirectory="..\Tools\LambdaTestTool\src\Amazon.Lambda.TestTool.BlazorTester"/>
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Copilot AI Jan 12, 2026

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The removal of the BlazorTester70 package build appears unrelated to the stated purpose of fixing the missing entry point exception. This change is not mentioned in the PR description. If this is intentional (e.g., dropping .NET 7 support which is end-of-life), it should be documented in the PR description and changelog.

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<Exec Command="$(PackCommand) Amazon.Lambda.TestTool.BlazorTester70-pack.csproj" WorkingDirectory="..\Tools\LambdaTestTool\src\Amazon.Lambda.TestTool.BlazorTester"/>
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@philasmar philasmar Jan 12, 2026

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Why are we only removing the Net7 version only?

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@normj normj Jan 12, 2026

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Because .NET 7 csproj file was actually deleted from the repo. This is a msbuild target used for local builds not what the CI system uses and it had gotten stale. It was currently failing because we previously deleted the .NET 7 version.

<Exec Command="$(PackCommand) Amazon.Lambda.TestTool.BlazorTester80-pack.csproj" WorkingDirectory="..\Tools\LambdaTestTool\src\Amazon.Lambda.TestTool.BlazorTester"/>
</Target>
<Target Name="build-lambda-test-tool-package-cicd" DependsOnTargets="init">
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