need_count is impossible to debug.

[nova308]

In case the ratio syntax of :need_count: divides by 0 internally, the only error one receives is a division by zero exception on sphinx level.

:need_count:`id=='REQ_SW_DOESNOTEXIST' ? id=='REQ_SW_DOESNOTEXIST'`

gives
Extension error (sphinx_needs.needs): Handler <function process_creator.<locals>.process_caller at 0x7f1887f56310> for event 'doctree-resolved' threw an exception: division by zero)

This is way too little information in case some change made the need_count divide by zero by accident. In larger projects where needs might be created by automation, it can take days to find where the issue actually originates from. What makes it even worse is that dividing usually is not associated with "?" operands.

Please provide more information on what actually caused the issue so the problem can be resolved in seconds instead of days.