How to reproduce:
- Go to https://commons.wikimedia.org/w/index.php?title=Commons:Sandbox&action=edit
- Paste the following
<translate>
Section
text </translate>
- Save
- Edit section 1
- Remove the section text
- Save
- Result: [767f846f] 2013-06-30 12:57:34: Fatal exception of type MWException
Expected result: JavaScript validation before submitting, a descriptive error message, a message showing the last opening translate tag along with a hint that a closing tag is missing
Choose one of the options you like best :-)
Version: unspecified
Severity: major