- Include original, loaded URI in error message.

sdk/lib/_internal/pub/lib/src/barback/transformer_isolate.dart

Index: sdk/lib/_internal/pub/lib/src/barback/transformer_isolate.dart
diff --git a/sdk/lib/_internal/pub/lib/src/barback/transformer_isolate.dart b/sdk/lib/_internal/pub/lib/src/barback/transformer_isolate.dart
index 65ba68f72ebe588c95c790b570093f8c6cfd97ba..e96927901414e69ac5e4418c7e7914dd798a2d7d 100644
--- a/sdk/lib/_internal/pub/lib/src/barback/transformer_isolate.dart
+++ b/sdk/lib/_internal/pub/lib/src/barback/transformer_isolate.dart
@@ -94,7 +94,7 @@ class TransformerIsolate {
         // error message.
         var missingTransformer = idsToUrls.keys.firstWhere((id) =>
             firstErrorLine.startsWith(
-                "Uncaught Error: Load Error: Failure getting ") &&
+                "Load Error for") &&
             firstErrorLine.contains(idsToUrls[id].path),
             orElse: () => throw error);
         var packageUri = idToPackageUri(idsToAssetIds[missingTransformer]);