[Issue 14336] Invalid memory access in struct destructor in std.uni

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=14336

--- Comment #1 from Dmitry Olshansky <dmitry.olsh at gmail.com> ---
(In reply to Vladimir Panteleev from comment #0)
> Created attachment 1495 [details]
> Valgrind log
> 
> Valgrind (with my Valgrind branch [1]) reports an incorrect memory access in
> std.uni.CowArray destructors (see attachment).
> 
> It looks like the following happens:
> 
> - The destructor is finalizing a heap-allocated array of
> InversionList!GcPolicy structs.
> - InversionList doesn't have a destructor, but it has a CowArray field
> ("data"). CowArray has a destructor, so one is automatically generated for
> InversionList.
> - CowArray!GcPolicy.~this calls the refCount @property.
> - The refCount @property attempts to refer to the heap-allocated (via
> GcPolicy) uint[] data field, which has already been destroyed by the GC. As
> I understand, this is an invalid memory access.
> 

Do you know a way to see if we are in GC finalizer vs normal destructor?

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