#6639 [BUG] [flytekit] Bug in list of basemodels type conversion Issue created by pimdh ### Flyte & Flytekit version flytekit 1.16.3 ### Describe the bug from flytekit import workflow, task from pydantic import BaseModel class M(BaseModel): pass class C(BaseModel): xs: list[M] = [] @task def f(x: list[M]) -> None: print(x) @task def z() -> C: return C() @workflow def d() -> None: f(z().xs) if name == "__main__": d() Running gives error:

TypeTransformerFailedError: Error encountered while executing 'bug.d':
  Error encountered while converting inputs of 'bug.f':
  Error converting input 'x' at position 0:
Literal value: Flyte Serialized object (Literal):
  scalar:
    binary:
      value: b'\x90'
      tag: msgpack
Expected Python type: list[__main__.M]
Exception: Field "" of type M in __root__ is not serializable

### Expected behavior I'd expect that code to work without failure and print an empty list. It has something to do with the fact that the

z().xs

gives a literal scalar containing msgpack of a list of dicts. If I'd have done def d(): f(C()) then the literal given to

f

is instead a literal of a collection of msgpacks of a dict. This is handled correctly by the type engine. ### Additional context to reproduce No response ### Screenshots No response ### Are you sure this issue hasn't been raised already? • Yes ### Have you read the Code of Conduct? • Yes flyteorg/flyte