[Webkit-unassigned] [Bug 189987] [Win] error C2139: 'WebKit::UpdateInfo': an undefined class is not allowed as an argument to compiler intrinsic type trait '__is_assignable'

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Thu Nov 15 21:40:15 PST 2018


--- Comment #11 from Fujii Hironori <Hironori.Fujii at sony.com> ---
Good news! Microsoft finally admits this is a bug.


> I've reexamined this problem, and come to the conclusion that I
> was wrong to claim this isn't a bug.
> The repro here - and for
> https://developercommunity.visualstudio.com/content/problem/383162/stdtuple-compiler-error-for-incomplete-type-refere.html
> as well - never ODR-uses the assignment operator of the
> tuple-of-reference-to-incomplete-type nor ODR-uses an
> implicitly-declared assignment operator of a class with the
> tuple-of-reference-to-incomplete-type as a subobject. In short,
> the repro shouldn't cause the potentially-deleted assignment
> operator to be generated yet the compiler does so anyway. That's
> a bug.
> My sincerest apologies for the mistake.

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