some function argument names cause "InternalServerError: syntax error"

[freeatnet]

• EdgeDB Version: 3.3+d5734dd
• EdgeDB CLI Version: 3.5.0+e1ad387
• OS Version: macOS 13.5.2

Steps to Reproduce:

1. Start with an empty edgedb project
2. Add the schema specified above
3. Create a migration and attempt to apply it

Expected: a function is created
Observed: InternalServerError: syntax error at or near "int8"

Additional triage:

The issue appears to be caused by using an argument name that matches a Postgres type that accepts a type modifier. For example, the following function declarations are handled correctly:

function myFuncPassA(arg0: int64) -> float64
using (
  select 2.3
);

function myFuncPassB(bigserial: str) -> float64
using (
  select 2.3
);

But the following cause an error:

function myFuncFailA(character: int64) -> float64
using (
  select 2.3
);

function myFuncFailB(interval: str) -> float64
using (
  select 2.3
);

Schema:

module default {
  function myFuncA(timestamp: int64) -> float64
  using (
    select 2.3
  );
}