[BUG] Empty string in second argument for set results in segmentation fault

[bmitc]

EasySNMP release version OR commit number
easysnmp-0.2.6. Specifically: easysnmp-0.2.6-cp310-cp310-manylinux_2_24_x86_64.whl

Operating System and Version

• OS: Ubuntu
• Version: 22.04

Net-SNMP Library Version
Not sure at the moment.

Describe the bug
Passing an empty string for the second argument in a set method call results in a segmentation fault.

>>> session.set('.1.3.6.1.4.1.3808.1.1.3.3.3.1.1.4.1.3', '')
Segmentation fault
$ <exits back to console>

To Reproduce
See bug description.

Expected behavior
No segmentation fault. At the worst, an exception should be raised.

Screenshots
n/a

Additional context
This was found while I am coming up to speed on SNMP to remotely control a Cyberpower PDU.

[bmitc]

I'm seeing more segmentation faults with set today as well in other instances. Even something as simple as:

session.set('.1.3.6.1.4.1.3808.1.1.3.3.3.1.1.4.1', '2')

segfaults.

It's possible that this is not the correct command for my device, but an exception is expected. A segmentation fault should always be treated as a bug.

I'm not sure of the exact issues, but I'm starting to feel that this library is not well-suited for inclusion in applications that need to be highly reliable and robust. This isn't a judgement, just an observation relevant to these bugs.