[Wikidata-bugs] [Maniphest] [Created] T103603: Editing a statement doesn't work after removing the only reference

[Bene]

Bene created this task.
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Bene added projects: Wikidata, MediaWiki-extensions-WikibaseView.
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TASK DESCRIPTION
  Steps to reproduce:
  
  <sjoerddebruin> 1. Remove the only existing reference
  <sjoerddebruin> 2. Try to add a qualifier to the statement
  <sjoerddebruin> 3. It never saves, stays on "saving..."
  
  The javascript console gives the following error:
  
  ```
  Error: Parameter not specified properly
  
  throw new Error( 'Parameter not specified properly' );
  
  RepoApi.js (Zeile 480)
  ```
  
  Which is
  ``` lang=js
  setClaim: function( claim, baseRevId, index ) {
        if( typeof claim !== 'object' || typeof baseRevId !== 'number' ) {
                throw new Error( 'Parameter not specified properly' );
        }
        ...
  ```

TASK DETAIL
  https://phabricator.wikimedia.org/T103603

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To: Bene
Cc: Aklapper, Bene, Wikidata-bugs, aude, Malyacko, P.Copp



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