Debugging of some functions misses first debug point

[dsyme]

For this code:

let TestFunction3() =
    try 
       let x = 1+1
       System.Console.WriteLine "Hello";
    with _ -> 
       System.Console.WriteLine "World"      

TestFunction3()

the first try is not laid down as a debug point. This is caused by the debug point of the let x falsely replacing that of the try when there is no generated code in-between.

[dsyme]

Fixed in #11981