Formatting TimeSpan with %A prints TotalMilliseconds instead of formatted TimeSpan #2409

Description

printfn "%A" myTimeSpan prints TotalMilliseconds of myTimeSpan and not a readable TimeSpan format.

Repro code

let ts = TimeSpan(11, 57, 37)
printfn "%A" ts
printfn "%s" (ts.ToString())

(repl)

Expected and actual results

Actual Output:

43057000
11:57:37

Expected Output:

11:57:37
11:57:37

During runtime TimeSpan becomes just milliseconds -- which is printed without any additional formatting.
It's probably not even possible to format: Type information isn't available at runtime and it's just a number (the milliseconds). So it might not be possible to distinguish TimeSpan from just number. But it still bites me every time I want to print a TimeSpan for debugging...

Workaround: manually call ToString() on TimeSpan. But that's only possible when it's known to be a TimeSpan.

Related information

• Versions:
  • Fable: 3.1.5
  • Repl: 3.1.5