46867 - add more helpful property path accessor exceptions

src/Symfony/Component/Form/Extension/Core/DataAccessor/PropertyPathAccessor.php

@@ -16,6 +16,7 @@
 use Symfony\Component\Form\FormInterface;
 use Symfony\Component\PropertyAccess\Exception\AccessException as PropertyAccessException;
 use Symfony\Component\PropertyAccess\Exception\NoSuchIndexException;
+use Symfony\Component\PropertyAccess\Exception\NoSuchPropertyException;
 use Symfony\Component\PropertyAccess\Exception\UninitializedPropertyException;
 use Symfony\Component\PropertyAccess\PropertyAccess;
 use Symfony\Component\PropertyAccess\PropertyAccessorInterface;
@@ -60,7 +61,11 @@ public function setValue(object|array &$data, mixed $value, FormInterface $form)
         // If the data is identical to the value in $data, we are
         // dealing with a reference
         if (!\is_object($data) || !$form->getConfig()->getByReference() || $value !== $this->getPropertyValue($data, $propertyPath)) {
-            $this->propertyAccessor->setValue($data, $propertyPath, $value);
+            try {
+                $this->propertyAccessor->setValue($data, $propertyPath, $value);
+            } catch (NoSuchPropertyException $e) {
+                throw new NoSuchPropertyException($e->getMessage().' Make the property public, add a setter, or set the "mapped" field option in the form type to be false.', 0, $e);
+            }
         }
     }