Fix bug where a % in a serialized array can lead to the data being br…

…oken

It turns out that is a field in a serialized array has a %2 (for example) this gets swapped in executeQuery for the
%2 value (in this case srcID - rendering the serialized array invalid. This proposes that we
explicitly handle arrays as  a data type in compose query.

Some thoughts
1) we could make serialized arrays valid types in validate (not done here)
2) we could iterate through the  array keys  & values escaping them -
at this stage it's left in the calling function
3) there are whole bikeshed factories to keep in business on discussion of whether
'Array-1', 'Array-2' etc are the right format

CRM/Dedupe/Finder.php

@@ -348,12 +348,12 @@ public static function parseAndStoreDupePairs($foundDupes, $cacheKeyString) {
         'canMerge' => TRUE,
       ];
 
-      $data = CRM_Core_DAO::escapeString(serialize($row));
       CRM_Core_DAO::executeQuery("INSERT INTO civicrm_prevnext_cache (entity_table, entity_id1, entity_id2, cacheKey, data) VALUES
-        ('civicrm_contact', %1, %2, %3, '{$data}')", [
+        ('civicrm_contact', %1, %2, %3, %4)", [
           1 => [$dstID, 'Integer'],
           2 => [$srcID, 'Integer'],
           3 => [$cacheKeyString, 'String'],
+          4 => [serialize($row), 'String'],
         ]
       );
     }

tests/phpunit/api/v3/JobTest.php

@@ -828,6 +828,22 @@ public function getMergeLocationData() {
 
   }
 
+  /**
+   * Test weird characters don't mess with merge & cause a fatal.
+   *
+   * @throws \CRM_Core_Exception
+   */
+  public function testNoErrorOnOdd() {
+    $this->individualCreate();
+    $this->individualCreate(['first_name' => 'Gerrit%0a%2e%0a']);
+    $this->callAPISuccess('Job', 'process_batch_merge', []);
+
+    $this->individualCreate();
+    $this->individualCreate(['first_name' => '[foo\\bar\'baz']);
+    $this->callAPISuccess('Job', 'process_batch_merge', []);
+    $this->callAPISuccessGetSingle('Contact',  ['first_name' => '[foo\\bar\'baz']);
+  }
+
   /**
    * Test the batch merge does not create duplicate emails.
    *