[Bug c++/82218] New: [C++1x] constexpr on static member function causes segfault

["emil.fresk at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82218

            Bug ID: 82218
           Summary: [C++1x] constexpr on static member function causes
                    segfault
           Product: gcc
           Version: 6.3.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: emil.fresk at gmail dot com
  Target Milestone: ---

The constexpr on line 55 in Compiler Explorer https://godbolt.org/g/sJA8nK
causes the segfault.
By removing this, it compiles fine.
The error is tested in 6.3.0 and 6.3.1, where it exists. 
Found on arm-none-eabi-gcc 6.3.1 on Ubuntu 16.04, reproduced on the normal GCC
6.3.x.
Not triggered any more in GCC 7.1 and 7.2.



Full error message:
<source>: In instantiation of 'static constexpr R delegate<R(Params
...)>::invoke_function(void*, Params ...) [with R (* Fptr)(Params ...) =
delegate<R(Params ...)>::error_function<void, {}>; R = void; Params = {}]':
103 : <source>:103:12:   required from 'static constexpr auto delegate<R(Params
...)>::from() [with R (* Fptr)(Params ...) = delegate<R(Params
...)>::error_function<void, {}>; R = void; Params = {}]'
72 : <source>:72:35:   required from 'delegate<R(Params ...)>::delegate() [with
R = void; Params = {}]'
134 : <source>:134:24:   required from here
43 : <source>:43:23:   in constexpr expansion of 'delegate<R(Params
...)>::error_function<void, {}>()'
42 : <source>:42:22: internal compiler error: Segmentation fault
   constexpr static R invoke_function(void*, Params... params) noexcept(
                      ^~~~~~~~~~~~~~~
mmap: Cannot allocate memory
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
Compiler exited with result code 1