Alt enter hotkey duplicates error messages causing persistent red underlines #8772
Description
Apache NetBeans version
Apache NetBeans 28 latest daily build
What happened
Using alt + enter while netbeans is still analyzing the source code (right after a change) causes the error message to duplicate. When that issue is fixed with alt + enter, because the message was duplicated, the error message remains and the line still has a red underline.
https://github.com/user-attachments/assets/41b70a41-e83d-41d8-8128-3a6c4838cd5c
Language / Project Type / NetBeans Component
Works with any java project
How to reproduce
Write this line without importing Map or HashMap. Map<String, String> hashMap = new HashMap(); Use alt + enter to import and quickly press alt + enter again, the error message for the second import will be duplicated. Also works with other bugs like a missing semicolon.
Did this work correctly in an earlier version?
No / Don't know
Operating System
macOS Sequioa 15.2
JDK
24.0.1
Apache NetBeans packaging
Own source build
Anything else
The bug is present both in Netbeans 26 binary zip and in own source build.
Are you willing to submit a pull request?
Yes