Upper bound doesn't work properly

[PrajwalKrishna]

On running -
new IPAddressString("235.234.5.6/4").getAddress().toPrefixBlock().toIPv4().upperLongValue()

The output is - 3774873599
Whereas, the expected output was - 4026531839

On using the toUpper() I am getting the expected output - 239.255.255.255.
On converting this to toUpper().longValue(), I am getting the expected output - 4026531839

[seancfoley]

You are correct, the bug is here where the code grabs the lower and not the upper value for the first segment.

The fix will be delivered in a release quite soon, likely in a few weeks.

In the meantime, you've already identified the work-around.

[PrajwalKrishna]

Thanks for prompt response.

[seancfoley]

This was fixed in version 5.4.0. Closing.