negora opened a new issue, #4908:
URL: https://github.com/apache/netbeans/issues/4908
### Apache NetBeans version
Apache NetBeans 15
### What happened
The XML editor stops highlighting syntax errors when you move the cursor to
a line that is correct (well-formed).
This may cause that important syntax errors go unnoticed until you run the
application. It may seem improbable to overlook errors like that, but when
you're quickly editing files with a medium to large size it's not.
### How to reproduce
It's very easy to reproduce. Simply write this code:
```xml
<?xml version="1.0" encoding="UTF-8"?>
<root>
<foo>
<bar/>
</root>
```
Here, the tag `<foo>` is unclosed. If you put the cursor in that line, the
error is highlighted:
However, if you move the cursor to a well-formed line, the editor stops
highlighting it:
### Did this work correctly in an earlier version?
No / Don't know
### Operating System
Debian GNU/Linux 11.5 (Bullseye)
### JDK
OpenJDK Runtime Environment (build 17.0.4+8-Debian-1deb11u1)
### Apache NetBeans packaging
Apache NetBeans binary zip
### Anything else
I've tested this in versions 13, 14 and 15 and all them are affected.
### Are you willing to submit a pull request?
No
### Code of Conduct
Yes
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