Well, you look it up:
info func FileException

0x00000000005ff7c4  std.file.FileException.this(const(char...

...I'll likely be the one implemented it, giving my new title over in GDB. :-)

...BP manally is not an option. I ask this for GDB integration in my IDE ;)

This would be better.

1/ because I could propose a modifiable list of the exception...

...linux (line numbers are often wrong in GDB and do not appear ins tack trace...

...stack traces on OSX, let alone run GDB or LLDB, but even on linux where...

Or you could break on a specific exception class's constructor.

it was almost that actually,
'break _d_throwc

unfortunately it doesn't work, i get

---
(gdb) Function "d_throw"/"d_throwc" not defined.

give

break d_throw

or maybe `break d_throwc` a try