Issue 25962. Check for the number of arguments vs. number of required parameters.

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 3fdd5f9a3db8a3b7a43e2afc1012365455acbf5e..38fda9be308aa7abcdbc57e059926bf9e9602740 100644
--- a/pkg/analysis_server/lib/src/services/correction/fix_internal.dart
+++ b/pkg/analysis_server/lib/src/services/correction/fix_internal.dart
@@ -428,7 +428,11 @@ class FixProcessor {
             .takeWhile((p) => p.parameterKind == ParameterKind.REQUIRED);
         Iterable<ParameterElement> optionalParameters = parameters
             .skipWhile((p) => p.parameterKind == ParameterKind.REQUIRED);
+        // prepare the argument to add a new parameter for
         int numRequired = requiredParameters.length;
+        if (numRequired >= arguments.length) {
+          return;
+        }
         Expression argument = arguments[numRequired];
         // prepare target
         int targetOffset;