Unhelpful error with uncurried functions of different types but same parameter count

[popstarfreas]

Rescript version: 9.1.3

When using uncurried functions, the compiler error is not helpful in pointing out the problem when two uncurried functions have different parameter types but the same number of parameters.

type callbackFn = (. int) => unit          
let a = (fn: callbackFn) => fn(. 1)        
                                           
type otherCallbackFn = (. float) => unit   
let otherFn: otherCallbackFn = (. _a) => ()
a(otherFn)                                 

Compiler gives:

4 _ type otherCallbackFn = (. float) => unit   
5 _ let otherFn: otherCallbackFn = (. _a) => ()
6 _ a(otherFn)                                 
7 _                                            
                                               
This function expected 1 argument, but got 1