[Ada] PR18847 Ada.Numerics.xx_Random.Value does not handle junk strings

[Richard Kenner]

    Ok the bug is trivial once I peek into the core dump:

No, you're missing it, I think.  When you're in GDB, what it does is
raises an explicit constraint error due to Int'Value, which is what's
expected.  However, for some reason when not under GDB, the handling
of the exception causes some SIGSEGV.