Re: [histogram][type_traits] strange compile error in boost.histogram for gcc-7.1+ with -std=c++17; possible bug in gcc?

From: Hans Dembinski (hans.dembinski_at_[hidden])
Date: 2020-10-30 14:16:40

> On 30. Oct 2020, at 14:52, Hans Dembinski <hans.dembinski_at_[hidden]> wrote:
> 
> Dear John and the other gurus,
> 
> a strange bug was reported for Boost.Histogram. It is a difficult one for which I would like to ask for help. To me it looks like a bug in gcc.
> 
> Here is the issue:
> https://github.com/boostorg/histogram/issues/290

Here is an absolute minimal example which does not include boost at all.

https://godbolt.org/z/hrcYao

clang is ok, msvc is ok, gcc fails.