Description
Description
While trying to resolve an assembly for loading, if one of the stages finds a mismatched version, later resolution stages fail to load good version.
Reproduction Steps
Put an old version of the required assembly in the application process .exe folder, then subscribe an assembly loader that will pick the right version from elsewhere.
Alternatively, I suspect that attempting to call Assembly.Load(name) with the wrong version beside the .exe and then execute LoadFrom(pathToGoodVersion) will fail as well.
Expected behavior
Good version should always succeed to load.
Here are traces of what happens if the assembly is not found at stage:ApplicationAssemblies, stage:AppDomainAssemblyResolveEvent succeeds.
| Rest |
| HasStack="True" ThreadID="55,320" ProcessorNumber="0" ClrInstanceID="10" AssemblyName="FluentAssertions, Version=6.7.0.0, Culture=neutral, PublicKeyToken=33f2691a05b67b6a" Stage="FindInLoadContext" AssemblyLoadContext="Default" Result="AssemblyNotFound" ResultAssemblyName="" ResultAssemblyPath="" ErrorMessage="Could not locate assembly" ActivityID="/#7520/1/206/" |
| HasStack="True" ThreadID="55,320" ProcessorNumber="0" ClrInstanceID="10" AssemblyName="FluentAssertions, Version=6.7.0.0, Culture=neutral, PublicKeyToken=33f2691a05b67b6a" Stage="ApplicationAssemblies" AssemblyLoadContext="Default" Result="AssemblyNotFound" ResultAssemblyName="" ResultAssemblyPath="" ErrorMessage="Could not locate assembly" ActivityID="/#7520/1/206/" |
| HasStack="True" ThreadID="55,320" ProcessorNumber="0" ClrInstanceID="10" AssemblyName="FluentAssertions, Version=6.7.0.0, Culture=neutral, PublicKeyToken=33f2691a05b67b6a" Stage="AssemblyLoadContextResolvingEvent" AssemblyLoadContext="Default" Result="AssemblyNotFound" ResultAssemblyName="" ResultAssemblyPath="" ErrorMessage="Could not locate assembly" ActivityID="/#7520/1/206/" |
| HasStack="True" ThreadID="55,320" ProcessorNumber="0" ClrInstanceID="10" AssemblyName="FluentAssertions, Version=6.7.0.0, Culture=neutral, PublicKeyToken=33f2691a05b67b6a" Stage="AppDomainAssemblyResolveEvent" AssemblyLoadContext="Default" Result="Success" ResultAssemblyName="FluentAssertions, Version=6.7.0.0, Culture=neutral, PublicKeyToken=33f2691a05b67b6a" ResultAssemblyPath="D:\src\subs\target\test\managedstore\Internal.Exchange.Test.ManagedStore.QTests.Common\bin\Debug\net6.0\FluentAssertions.dll" ErrorMessage="" ActivityID="/#7520/1/206/" |
Actual behavior
If the mismatched version is ever rejected, no good version can be loaded.
Here are traces of what happens if the mismatched version is found at stage:ApplicationAssemblies, stage:AppDomainAssemblyResolveEvent succeeds.
| Rest |
| HasStack="True" ThreadID="60,068" ProcessorNumber="0" ClrInstanceID="9" AssemblyName="FluentAssertions, Version=6.7.0.0, Culture=neutral, PublicKeyToken=33f2691a05b67b6a" Stage="FindInLoadContext" AssemblyLoadContext="Default" Result="AssemblyNotFound" ResultAssemblyName="" ResultAssemblyPath="" ErrorMessage="Could not locate assembly" ActivityID="/#57240/1/206/" |
| HasStack="True" ThreadID="60,068" ProcessorNumber="0" ClrInstanceID="9" AssemblyName="FluentAssertions, Version=6.7.0.0, Culture=neutral, PublicKeyToken=33f2691a05b67b6a" Stage="ApplicationAssemblies" AssemblyLoadContext="Default" Result="MismatchedAssemblyName" ResultAssemblyName="FluentAssertions, Version=5.6.0.0, Culture=neutral, PublicKeyToken=33f2691a05b67b6a" ResultAssemblyPath="D:\src\subs\target\test\tools\UniTP\bin\Debug\net6.0\FluentAssertions.dll" ErrorMessage="Requested version 6.7.0.0 is incompatible with found version 5.6.0.0" ActivityID="/#57240/1/206/" |
| HasStack="True" ThreadID="60,068" ProcessorNumber="0" ClrInstanceID="9" AssemblyName="FluentAssertions, Version=6.7.0.0, Culture=neutral, PublicKeyToken=33f2691a05b67b6a" Stage="AssemblyLoadContextResolvingEvent" AssemblyLoadContext="Default" Result="AssemblyNotFound" ResultAssemblyName="" ResultAssemblyPath="" ErrorMessage="Could not locate assembly" ActivityID="/#57240/1/206/" |
| HasStack="True" ThreadID="60,068" ProcessorNumber="0" ClrInstanceID="9" AssemblyName="FluentAssertions, Version=6.7.0.0, Culture=neutral, PublicKeyToken=33f2691a05b67b6a" Stage="AppDomainAssemblyResolveEvent" AssemblyLoadContext="Default" Result="Exception" ResultAssemblyName="" ResultAssemblyPath="" ErrorMessage="Could not load file or assembly 'FluentAssertions, Version=6.7.0.0, Culture=neutral, PublicKeyToken=33f2691a05b67b6a'." ActivityID="/#57240/1/206/" |
Regression?
Yes,
This did not happen in net472, but happens in net6.0
Known Workarounds
Avoid bad versions.
Configuration
net6.0
Windows
x64
Other information
No response
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