Use single InputPackagesResultProvider, without SdkSummaryResultProvider.

pkg/analysis_server/lib/src/services/correction/fix_internal.dart

Index: pkg/analysis_server/lib/src/services/correction/fix_internal.dart
diff --git a/pkg/analysis_server/lib/src/services/correction/fix_internal.dart b/pkg/analysis_server/lib/src/services/correction/fix_internal.dart
index c29be046eae2caa6b2598d853f422c789962d5e6..2a904262bbb59be539e4a8788e0ba71e52959435 100644
--- a/pkg/analysis_server/lib/src/services/correction/fix_internal.dart
+++ b/pkg/analysis_server/lib/src/services/correction/fix_internal.dart
@@ -1011,6 +1011,9 @@ class FixProcessor {
       }
       staticModifier = _inStaticContext();
     }
+    if (targetClassElement.librarySource.isInSystemLibrary) {
+      return;
+    }
     utils.targetClassElement = targetClassElement;
     // prepare target ClassDeclaration
     AstNode targetTypeNode = getParsedClassElementNode(targetClassElement);
@@ -1144,6 +1147,9 @@ class FixProcessor {
       }
       staticModifier = _inStaticContext();
     }
+    if (targetClassElement.librarySource.isInSystemLibrary) {
+      return;
+    }
     utils.targetClassElement = targetClassElement;
     // prepare target ClassDeclaration
     AstNode targetTypeNode = getParsedClassElementNode(targetClassElement);
@@ -2014,6 +2020,9 @@ class FixProcessor {
           return;
         }
         ClassElement targetClassElement = targetType.element as ClassElement;
+        if (targetClassElement.librarySource.isInSystemLibrary) {
+          return;
+        }
         targetElement = targetClassElement;
         // prepare target ClassDeclaration
         AstNode targetTypeNode = getParsedClassElementNode(targetClassElement);