Compilation Failure - empty scalar initializer - Inheritable objects & Atomics [OA]RC on DEVEL

[shayanhabibi]

The following fails to compile with the listed error using ARC or ORC however compiles successfully on REFC

import atomics

type
  # Deprivation* = ref object of RootObj    # compiles
  Deprivation* = object of RootObj        # fails
    memes*: Atomic[int]
  Zoomer = object
    dopamine: Deprivation                 # fails
    # dopamine: ref Deprivation             # compiles

# discard Deprivation()                     # compiles
discard Zoomer()                          # fails

I have tagged which lines I have narrowed down to causing issues and what doesn't.

This was found while trying to use elijahrs lockfreequeue types as fields of objects.

C:\Users\PC\nimcache\cpsloop_r\@mcpsloop.nim.c:199:132: error: empty scalar initializer
 static NIM_CONST tyObject_Zoomer__yhOZMQHEaznD9aq8IQHJaMQ TM__8CKjD9bWE6mTvTNPLW3KYWw_2 = {{{(&NTIv2__DdWjNMQNgJ9aHiVjMo4gjYw_)}, {{}}}}

                        ^
C:\Users\PC\nimcache\cpsloop_r\@mcpsloop.nim.c:199:132: note: (near initialization for 'TM__8CKjD9bWE6mTvTNPLW3KYWw_2.dopamine.memes.value')
Error: execution of an external compiler program 'gcc.exe -c  -w -fmax-errors=3 -mno-ms-bitfields -O3 -fno-strict-aliasing -fno-ident   -IC:\Users\PC\.choosenim\toolchains\nim-#devel\lib -Ic:\Users\PC\Documents\Programming\ParthianProject\Modules\cps_minfosclient\cpsbridge -o C:\Users\PC\nimcache\cpsloop_r\@mcpsloop.nim.c.o C:\Users\PC\nimcache\cpsloop_r\@mcpsloop.nim.c' failed with exit code: 1

[ringabout]

Related: https://github.com/nim-lang/Nim/issues/18410

C++ backend can be fixed using -std=gnu++17

I'll push a fix after https://github.com/nim-lang/Nim/pull/18836 is merged or solved.

[metagn]

This is not fixed, or at least it's not tested (this test also does not run for c++ at all). -std=gnu++17 does not seem to fix it.