[Issue 21729] rawRead derefences null pointer if invoked on closed File (segfault)

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21729

Berni44 <bugzilla at bernis-buecher.de> changed:

           What    |Removed                     |Added
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                 CC|                            |bugzilla at bernis-buecher.de

--- Comment #1 from Berni44 <bugzilla at bernis-buecher.de> ---
I think, before doing this "trustedFread" in (currently) line 1057, there needs
to be an `enforce(_p !is null, some message)`. But I'm not firm enough in
std.stdio, so I don't want to file a fixing PR. Might fix 21728 too.

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