Arduino 1.8.11 Library Manager: Comparison method violates its original contract.

[rei-vilo]

On the Arduino 1.8.11 IDE, when calling the menu Sketch > Include Library > Manage Libraries and asking the list of updatable librairies, the Library Manager displays the following error message:

Comparison method violates its original contract.

• What does it mean?
• How to get rid of it?

Thank you!

[cmaglie]

A possible explanation is here: #9748

May you try the pull-requrest build to see if it solves the problem?

[rei-vilo]

Thank you! arduino-PR-9748-BUILD-918-macosx seems to solve the issue with the Library Manager.

[BigGene]

Just had this error using Arduino IDE 1.8.13.

[MortenHofft]

I just installed the software (Arduino IDE 1.8.19 downloaded from https://www.arduino.cc/en/software) for the first time and sees this as the first thing.

OS: Catalina 10.15.7