negative value for head() (limit node) rejected because of IRNode type

[sync-by-unito[bot]]

The type of the argument for the limit node is funky. Currently we throw an incomprehensible error that the IRNode type is incorrect. -1 gets rendered as a function type rather than an integer. Then when MemorySource receives it, it rejects the function.

┆Issue is synchronized with this Jira Bug by Unito