[ashmind/SharpLab#1335] Provide additional information when failing t…

…o load Roslyn internals
ashmind · Jun 5, 2024 · 14d8ccc · 14d8ccc
1 parent 01c541b
commit 14d8ccc
Showing 1 changed file with 17 additions and 2 deletions.
diff --git a/Common/Internal/Roslyn/RoslynInternals.cs b/Common/Internal/Roslyn/RoslynInternals.cs
@@ -61,7 +61,8 @@ private static Assembly LoadInternalsAssemblyWithDependenciesSlowUncached() {
                         ?? LoadInternalsAssemblySlow(new Version(4, 2));
             }
 
-            PreloadInternalAssemblyDependenciesSlow(assembly);
+            PreloadInternalsAssemblyDependenciesSlow(assembly);
+            EnsureInternalsTypesCanLoad(assembly);
             return assembly;
         }
 
@@ -76,6 +77,20 @@ private static Assembly LoadInternalsAssemblyWithDependenciesSlowUncached() {
             return assembly;
         }
 
+        private static void EnsureInternalsTypesCanLoad(Assembly assembly) {
+            try {
+                _ = assembly.DefinedTypes;
+            }
+            catch (ReflectionTypeLoadException ex) {
+                throw new Exception(
+                    $"Failed to load MirrorSharp Roslyn internals.{Environment.NewLine}" +
+                    $"  * Microsoft.CodeAnalysis {RoslynAssemblies.MicrosoftCodeAnalysis.GetName().Version}.{Environment.NewLine}" +
+                    $"  * {assembly.GetName().Name}",
+                    ex
+                );
+            }
+        }
+
         private static Assembly LoadInternalsAssemblySlow(Version roslynVersion) {
             var assemblyName = roslynVersion switch {
                 { Major: > 4 } or { Major: 4, Minor: >= 11 } => "MirrorSharp.Internal.Roslyn411.dll",
@@ -112,7 +127,7 @@ private static Assembly LoadInternalsAssemblySlow(Version roslynVersion) {
             #endif
         }
 
-        private static void PreloadInternalAssemblyDependenciesSlow(Assembly assembly) {
+        private static void PreloadInternalsAssemblyDependenciesSlow(Assembly assembly) {
             foreach (var reference in assembly.GetReferencedAssemblies()) {
                 Assembly.Load(reference);
             }