Bug: Incorrect error handling in a select iterator

[savolgin]

Calling a select with a condition in which the type of the column and the type of the value do not match causes the task to freeze and does not return any result.

Steps to reproduce the issue

Call select
require('crud').select('space_name', {{'=', 'id', 'not_number'}})

What's the expected result?

error message

What's the actual result?

does not respond

Additional details

cartridge log:
myapp.router | 2020-10-14 12:10:47.946 [757] main/132/lua replicaset.lua:257 E> Exception during calling '__call' on 'localhost:3304(admin@localhost:3304)': Supplied key type of part 0 does not match index part type: expected unsigned myapp.router | 2020-10-14 12:10:47.946 [757] main/131/lua utils.c:1028 E> LuajitError: /opt/myapp/crud/select/iterator.lua:104: attempt to call method 'new' (a nil value)