- 
    Bug 
- 
    Resolution: Done
- 
    P3: Somewhat important 
- 
    5.9.3
- 
    macOS 10.11
- 
        1cc30fe77d04f745263525e0d4d5e7796ecf792c (qt/qtbase/5.12)
When showing group separators in a QSpinBox, it is possible to put in clearly invalid numbers such as:
1,,,,,,2
which will be automatically fixed up if the focus leaves the spinbox. Since this is a clearly invalid number then the validator should prevent it from happening.