Compilation failing when using CreateBlobFromPinned

[mrsaturnsan]

It seems like an hlsl::Exception is being thrown when calling Compile for preprocessing data. However, the exception is not being caught by the try-catch block in Compile. Perhaps it's being thrown by clang elsewhere once compilation has begun? I'm using IDxcCompiler3. It looks like compilation is failing inside here.

if (isPreprocessing) {
        // These settings are back-compatible with fxc.
        clang::PreprocessorOutputOptions &PPOutOpts =
          compiler.getPreprocessorOutputOpts();
        PPOutOpts.ShowCPP = 1;            // Print normal preprocessed output.
        PPOutOpts.ShowComments = 0;       // Show comments.
        PPOutOpts.ShowLineMarkers = 1;    // Show \#line markers.
        PPOutOpts.UseLineDirectives = 1;  // Use \#line instead of GCC-style \# N.
        PPOutOpts.ShowMacroComments = 0;  // Show comments, even in macros.
        PPOutOpts.ShowMacros = 0;         // Print macro definitions.
        PPOutOpts.RewriteIncludes = 0;    // Preprocess include directives only.

        FrontendInputFile file(pUtf8SourceName, IK_HLSL);
        clang::PrintPreprocessedAction action;
        if (action.BeginSourceFile(compiler, file)) {
          action.Execute();
          action.EndSourceFile();
        }
        outStream.flush();
      }

[mrsaturnsan]

I'm passing in a UTF8 const char* without any BOM from C#.

[mrsaturnsan]

Actually, it may be related to the fact that i'm trying to compile shaders via many threads at once.