I don't know which version of DMD you're using or when this part of druntime was update, but it's clearly not private according to the source code:https://github.com/D-Programming-Language/druntime/blob/master/src/core/exception.d#L380
I knowm, it's weird, i've been trying to find out why it's private, everything looks like it's public. Try running the code i posted see if you can get it to work.
