updated core to 1.7.16

system/src/Grav/Common/Data/BlueprintSchema.php

@@ -317,6 +317,10 @@ class BlueprintSchema extends BlueprintSchemaBase implements ExportInterface
                     $toggle = [];
                 }
                 // Recursively fetch the items.
+                $childData = $data[$key] ?? null;
+                if (null !== $childData && !is_array($childData)) {
+                    throw new \RuntimeException(sprintf("Bad form data for field collection '%s': %s used instead of an array", $key, gettype($childData)));
+                }
                 $data[$key] = $this->processFormRecursive($data[$key] ?? null, $toggle, $value);
             } else {
                 $field = $this->get($value);