ApiErrorFormatter_BackCompat: Use first error, not last

[lhc/web/wiklou.git] / includes / api / ApiErrorFormatter.php

diff --git a/includes/api/ApiErrorFormatter.php b/includes/api/ApiErrorFormatter.php
index 814004a..c52b731 100644 (file)
--- a/includes/api/ApiErrorFormatter.php
+++ b/includes/api/ApiErrorFormatter.php
@@ -414,12 +414,17 @@ class ApiErrorFormatter_BackCompat extends ApiErrorFormatter {
 
                if ( $tag === 'error' ) {
                        // In BC mode, only one error
-                       $value = [
-                               'code' => $msg->getApiCode(),
-                               'info' => $value,
-                       ] + $msg->getApiData();
-                       $this->result->addValue( null, 'error', $value,
-                               ApiResult::OVERRIDE | ApiResult::ADD_ON_TOP | ApiResult::NO_SIZE_CHECK );
+                       $existingError = $this->result->getResultData( [ 'error' ] );
+                       if ( !is_array( $existingError ) ||
+                               !isset( $existingError['code'] ) || !isset( $existingError['info'] )
+                       ) {
+                               $value = [
+                                       'code' => $msg->getApiCode(),
+                                       'info' => $value,
+                               ] + $msg->getApiData();
+                               $this->result->addValue( null, 'error', $value,
+                                       ApiResult::OVERRIDE | ApiResult::ADD_ON_TOP | ApiResult::NO_SIZE_CHECK );
+                       }
                } else {
                        if ( $modulePath === null ) {
                                $moduleName = 'unknown';