[Issue 19317] dip1008 doesn't call the throwable's destructor in _d_delThrowable

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19317

--- Comment #3 from Walter Bright <bugzilla at digitalmars.com> ---
The fix for https://issues.dlang.org/show_bug.cgi?id=19317 appears to resolve
this as well:

https://github.com/dlang/dmd/pull/9481

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