Fix for a new infinite cycle in InterfaceTypeImpl.substitute2().

pkg/analyzer/lib/src/dart/element/type.dart

Index: pkg/analyzer/lib/src/dart/element/type.dart
diff --git a/pkg/analyzer/lib/src/dart/element/type.dart b/pkg/analyzer/lib/src/dart/element/type.dart
index 0a47f064287c0204c1b91c4d2b85d50ebca847cf..da017f5d5c4bff17daebc8b8c9bb2b7bbb0eb6fb 100644
--- a/pkg/analyzer/lib/src/dart/element/type.dart
+++ b/pkg/analyzer/lib/src/dart/element/type.dart
@@ -2036,6 +2036,20 @@ class InterfaceTypeImpl extends TypeImpl implements InterfaceType {
     if (argumentTypes.length == 0 || typeArguments.length == 0) {
       return this.pruned(prune);
     }
+
+    // If every parameter type is equal to the corresponding argument type,
+    // then the type will not change. Return it as is.
+    bool isIdentityTransformation = true;
+    for (int i = 0; i < parameterTypes.length; i++) {
+      if (parameterTypes[i] != argumentTypes[i]) {
+        isIdentityTransformation = false;
+        break;
+      }
+    }
+    if (isIdentityTransformation) {
+      return this;
+    }
+
     List<DartType> newTypeArguments = TypeImpl.substitute(
         typeArguments, argumentTypes, parameterTypes, prune);