System.IO.FileNotFoundException: Could not find file "/mscorlib.dll"

Version Used: 3.3.1 CodeAnalysis scripting crashed

 _options = ScriptOptions.Default
                    .AddReferences(
                        typeof(System.Guid).Assembly,
                        typeof(System.DateTime).Assembly,
                        typeof(IQueryablePagingExtensions).Assembly);`

>  System.TypeInitializationException: The type initializer for 'blaze.clients.shared.Extensions.IQueryablePagingExtensions' threw an exception. ---> System.IO.FileNotFoundException: Could not find file "/mscorlib.dll"
d.printErr @ blazor.webassembly.js:1
blazor.webassembly.js:1 WASM:   at System.IO.FileStream..ctor (System.String path, System.IO.FileMode mode, System.IO.FileAccess access, System.IO.FileShare share, System.Int32 bufferSize, System.Boolean anonymous, System.IO.FileOptions options) <0x4502058 + 0x002ca> in <b883731ddd174c84b6d28072a5ecfbb7>:0 
d.printErr @ blazor.webassembly.js:1
blazor.webassembly.js:1 WASM:   at System.IO.FileStream..ctor (System.String path, System.IO.FileMode mode, System.IO.FileAccess access, System.IO.FileShare share) <0x44f8558 + 0x0001e> in <b883731ddd174c84b6d28072a5ecfbb7>:0 
d.printErr @ blazor.webassembly.js:1
blazor.webassembly.js:1 WASM:   at System.IO.File.OpenRead (System.String path) <0x44f8490 + 0x0000a> in <b883731ddd174c84b6d28072a5ecfbb7>:0 
d.printErr @ blazor.webassembly.js:1
blazor.webassembly.js:1 WASM:   at Roslyn.Utilities.FileUtilities.OpenFileStream (System.String path) <0x44f82b8 + 0x0005e> in <a31c2e7fc2484532bec3a244fde7efbf>:0 
d.printErr @ blazor.webassembly.js:1
blazor.webassembly.js:1 WASM:   at Microsoft.CodeAnalysis.MetadataReference.CreateFromAssemblyInternal (System.Reflection.Assembly assembly, Microsoft.CodeAnalysis.MetadataReferenceProperties properties, Microsoft.CodeAnalysis.DocumentationProvider documentation) <0x44ef9c0 + 0x00088> in <a31c2e7fc2484532bec3a244fde7efbf>:0 
d.printErr @ blazor.webassembly.js:1
blazor.webassembly.js:1 WASM:   at Microsoft.CodeAnalysis.Scripting.ScriptOptions.CreateReferenceFromAssembly (System.Reflection.Assembly assembly) <0x44ef520 + 0x00010> in <3f16222c2b534ca383a9db0f1737ef50>:0 
d.printErr @ blazor.webassembly.js:1
blazor.webassembly.js:1 WASM:   at (wrapper delegate-invoke) System.Func`2[System.Reflection.Assembly,Microsoft.CodeAnalysis.MetadataReference].invoke_TResult_T(System.Reflection.Assembly)
d.printErr @ blazor.webassembly.js:1
blazor.webassembly.js:1 WASM:   at Microsoft.CodeAnalysis.Scripting.ParameterValidationHelpers+<>c__DisplayClass4_0`2[T,S].<SelectChecked>b__0 (T item) <0x44ef440 + 0x0002c> in <3f16222c2b534ca383a9db0f1737ef50>:0 
d.printErr @ blazor.webassembly.js:1
blazor.webassembly.js:1 WASM:   at (wrapper delegate-invoke) System.Func`2[System.Reflection.Assembly,Microsoft.CodeAnalysis.MetadataReference].invoke_TResult_T(System.Reflection.Assembly)
d.printErr @ blazor.webassembly.js:1
blazor.webassembly.js:1 WASM:   at System.Linq.Enumerable+SelectArrayIterator`2[TSource,TResult].MoveNext () <0x44ef1f8 + 0x00062> in <f6f4ba026f444d0c8ea39799e4d0b3cb>:0 
d.printErr @ blazor.webassembly.js:1
blazor.webassembly.js:1 WASM:   at Microsoft.CodeAnalysis.Scripting.ParameterValidationHelpers.AddRangeChecked[T] (Microsoft.CodeAnalysis.ArrayBuilder`1[T] builder, System.Collections.Generic.IEnumerable`1[T] items, System.String parameterName) <0x44eedc0 + 0x00096> in <3f16222c2b534ca383a9db0f1737ef50>:0 
d.printErr @ blazor.webassembly.js:1
blazor.webassembly.js:1 WASM:   at Microsoft.CodeAnalysis.Scripting.ParameterValidationHelpers.ConcatChecked[T] (System.Collections.Immutable.ImmutableArray`1[T] existing, System.Collections.Generic.IEnumerable`1[T] items, System.String parameterName) <0x44e2e60 + 0x00028> in <3f16222c2b534ca383a9db0f1737ef50>:0 
d.printErr @ blazor.webassembly.js:1
blazor.webassembly.js:1 WASM:   at Microsoft.CodeAnalysis.Scripting.ScriptOptions.AddReferences (System.Collections.Generic.IEnumerable`1[T] references) <0x44e2c18 + 0x00020> in <3f16222c2b534ca383a9db0f1737ef50>:0 
d.printErr @ blazor.webassembly.js:1
blazor.webassembly.js:1 WASM:   at Microsoft.CodeAnalysis.Scripting.ScriptOptions.AddReferences (System.Collections.Generic.IEnumerable`1[T] references) <0x44d5f20 + 0x0001e> in <3f16222c2b534ca383a9db0f1737ef50>:0 
d.printErr @ blazor.webassembly.js:1
blazor.webassembly.js:1 WASM:   at Microsoft.CodeAnalysis.Scripting.ScriptOptions.AddReferences (System.Reflection.Assembly[] references) <0x44d5c00 + 0x00008> in <3f16222c2b534ca383a9db0f1737ef50>:0 

[ordinaryorange]

@tmat you are correct in that assemblies are not stored on disk. However I think the underlying culprit here is that the Script api has a dependency on a file system being available, and the assembly being on it.

This line eventually calls File.OpenRead() and there appears no way to circumvent that.

If coreLib was resolved via a MetaDataReferenceResolver as all the other assemblies are/can be (via Options.MetadataReferences) then it would be possible to supply a custom MetadaReferenceResolver for code executing in Bazor style hosts which do not store the assemblies on disk.

I’m unsure why CorLib has been treated differently than all other assemblies, and does seem to be an implementation oversight to seek CoreLib from the disk when MetaDataReferenceResolver extensibility has been baked in?

[gfs]

@Arestis How did you overcome the limitation @ordinaryorange mentions?

I am currently blocked here because of the hard dependency on mscorlib.dll being on disc - I am passing in the in memory meta data references for everything I need (including mscorlib).