[LLVMbugs] [Bug 21103] clang does not correctly compile constexpr function for literal types that have a non-constexpr copy constructor

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=21103

Richard Smith <richard-llvm at metafoo.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |richard-llvm at metafoo.co.uk
         Resolution|---                         |INVALID

--- Comment #1 from Richard Smith <richard-llvm at metafoo.co.uk> ---
This looks like a GCC bug. The copy constructor for 'B<-1>' is not constexpr,
but you're invoking it to initialize the parameter of 'f', so the expression is
non-constant.

EDG rejects this for the same reason Clang does. I suspect GCC is failing to
check whether the copy constructor is constexpr when it's trivial?

Please reopen if you still believe this is a Clang (and EDG) bug, rather than a
GCC accepts-invalid.

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