AIKIDO-2026-34869

TL;DR

The AshGraphql.Graphql.Resolver.query_complexity/3 function computes complexity by multiplying a pagination limit argument during Absinthe complexity analysis. When a client sends an explicit limit: null, the code multiplies nil and raises an ArithmeticError. Because complexity analysis runs before execution and outside the resolver's error handling, the exception escapes and the paginated query returns a 500 response instead of a GraphQL error. The fix handles null limit arguments so complexity analysis no longer crashes.