Catch block not hit in unittest

[Jonathan M Davis via Digitalmars-d-learn]

On Thursday, November 24, 2016 13:42:25 Kagamin via Digitalmars-d-learn 
wrote:
> Linux? Probably another bug.
> Try this:
> unittest
> {
>      import core.exception : UnicodeException;
>      void f()
>      {
>          string ret;
>          int i = -1;
>          ret ~= i;
>      }
>
>      try
>      {
>          f();
>      }
>      catch(UnicodeException e)
>      {
>          assert(e.msg == "Invalid UTF-8 sequence");
>      }
> }

If you're doing that, you might as well use std.exception.assertThrown or
collectException. e.g.

assertThrown!UnicodeException(f());

or

assert(collectException!UnicodeException(f()).msg ==
       "Invalid UTF-8 sequence.");

You could also do the same with a lambda to avoid the explicit function.

Regardless, I don't know why the OP is hitting this problem, and
unfortunately, I can't test it on my local machine at the moment to try and
see what's going on.

- Jonathan M Davis