invalid C++ codegen with `Thread`/`Atomic`/`createThread` (no `ptr` involved)

[tersec]

Description

import std/atomics
type N = object
  u: Atomic[int]
proc w(args: N) = discard
var e: Thread[N]
createThread(e, w, default(N))

Use nim cpp --mm:refc m.nim

Nim Version

v2.0.8:

Nim Compiler Version 2.0.8 [Linux: amd64]
Compiled at 2024-09-23
Copyright (c) 2006-2023 by Andreas Rumpf

git hash: 5935c3bfa9fec6505394867b23510eb5cbab3dbf
active boot switches: -d:release

version-2-0:

Nim Compiler Version 2.0.9 [Linux: amd64]
Compiled at 2024-09-23
Copyright (c) 2006-2023 by Andreas Rumpf

git hash: 27381cc60213e19aa34664176bd358ca5e45bd5a
active boot switches: -d:release

version-2-2:

Nim Compiler Version 2.1.99 [Linux: amd64]
Compiled at 2024-09-23
Copyright (c) 2006-2024 by Andreas Rumpf

git hash: 755307be61e4ee7b32c8354b2c303d04bdfc3a3e
active boot switches: -d:release

devel:

Nim Compiler Version 2.1.99 [Linux: amd64]
Compiled at 2024-09-23
Copyright (c) 2006-2024 by Andreas Rumpf

git hash: a55c15c651b805c5eca4475f9845a57adf6cddef
active boot switches: -d:release

g++ (Debian 14.2.0-5) 14.2.0
Copyright (C) 2024 Free Software Foundation, Inc.

Current Output

Hint: used config file '/tmp/nim/config/nim.cfg' [Conf]
Hint: used config file '/tmp/nim/config/config.nims' [Conf]
.........................................................................
CC: nim/lib/system/exceptions.nim
CC: nim/lib/std/private/threadtypes.nim
CC: nim/lib/std/private/digitsutils.nim
CC: nim/lib/std/assertions.nim
CC: nim/lib/system/dollars.nim
CC: nim/lib/std/typedthreads.nim
CC: nim/lib/pure/collections/sharedlist.nim
CC: nim/lib/system.nim
CC: m.nim
/tmp/nimcache/@mm.nim.cpp: In function ‘void NimMainModule()’:
/tmp/nimcache/@mm.nim.cpp:177:60: error: use of deleted function ‘tyObject_N__QM8RoNEnl77SyM0iU3IJ8A::tyObject_N__QM8RoNEnl77SyM0iU3IJ8A(const tyObject_N__QM8RoNEnl77SyM0iU3IJ8A&)’
  177 |         nimlf_(6, "/tmp/m.nim");        createThread__m_u27((*(&e__m_u15)), w__m_u6, T1_);
      |                                         ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/tmp/nimcache/@mm.nim.cpp:40:8: note: ‘tyObject_N__QM8RoNEnl77SyM0iU3IJ8A::tyObject_N__QM8RoNEnl77SyM0iU3IJ8A(const tyObject_N__QM8RoNEnl77SyM0iU3IJ8A&)’ is implicitly deleted because the default definition would be ill-formed:
   40 | struct tyObject_N__QM8RoNEnl77SyM0iU3IJ8A {
      |        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/tmp/nimcache/@mm.nim.cpp: At global scope:
/tmp/nimcache/@mm.nim.cpp:40:8: error: use of deleted function ‘std::atomic<long int>::atomic(const std::atomic<long int>&)’
In file included from /tmp/nimcache/@mm.nim.cpp:9:
/usr/include/c++/14/atomic:880:7: note: declared here
  880 |       atomic(const atomic&) = delete;
      |       ^~~~~~
/tmp/nimcache/@mm.nim.cpp:40:8: note: use ‘-fdiagnostics-all-candidates’ to display considered candidates
   40 | struct tyObject_N__QM8RoNEnl77SyM0iU3IJ8A {
      |        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/tmp/nimcache/@mm.nim.cpp: In function ‘void NimMainModule()’:
/tmp/nimcache/@mm.nim.cpp:177:60: note: use ‘-fdiagnostics-all-candidates’ to display considered candidates
  177 |         nimlf_(6, "/tmp/m.nim");        createThread__m_u27((*(&e__m_u15)), w__m_u6, T1_);
      |                                         ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/tmp/nimcache/@mm.nim.cpp:73:174: note:   initializing argument 3 of ‘void createThread__m_u27(tyObject_Thread__nZr9anuXgjZYbdDHt5WUT9ag&, tyProc__wfITwjpjmvZY7CvJJ4a1Qw, tyObject_N__QM8RoNEnl77SyM0iU3IJ8A)’
   73 | N_LIB_PRIVATE N_NIMCALL(void, createThread__m_u27)(tyObject_Thread__nZr9anuXgjZYbdDHt5WUT9ag& t_p0, tyProc__wfITwjpjmvZY7CvJJ4a1Qw tp_p1, tyObject_N__QM8RoNEnl77SyM0iU3IJ8A param_p2);
      |                                                                                                                                           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~
In file included from /usr/include/x86_64-linux-gnu/sys/types.h:144,
                 from /tmp/nimcache/@mm.nim.cpp:8:
/tmp/nimcache/@mm.nim.cpp: In function ‘void atmmdotnim_DatInit000()’:
/tmp/nimcache/@mm.nim.cpp:196:81: error: ‘TY__P0dQMTG1GttfzBfnDUwPsg’ {aka ‘struct std::atomic<long int>’} has no member named ‘raw’
  196 | TM__oKjqU9aPjLw9bdxdDjEzAT5Q_0[1].offset = offsetof(TY__P0dQMTG1GttfzBfnDUwPsg, raw);
      |                                                                                 ^~~
Error: execution of an external compiler program 'g++ -c -std=gnu++17 -funsigned-char  -w -fmax-errors=3 -fpermissive -pthread   -I/tmp/nim/lib -I/tmp -o /tmp/nimcache/@mm.nim.cpp.o /tmp/nimcache/@mm.nim.cpp' failed with exit code: 1


/tmp/nimcache/@mnim@slib@sstd@stypedthreads.nim.cpp: In function ‘void createThread__m_u27(tyObject_Thread__nZr9anuXgjZYbdDHt5WUT9ag&, tyProc__wfITwjpjmvZY7CvJJ4a1Qw, tyObject_N__QM8RoNEnl77SyM0iU3IJ8A)’:
/tmp/nimcache/@mnim@slib@sstd@stypedthreads.nim.cpp:378:21: error: use of deleted function ‘tyObject_N__QM8RoNEnl77SyM0iU3IJ8A& tyObject_N__QM8RoNEnl77SyM0iU3IJ8A::operator=(const tyObject_N__QM8RoNEnl77SyM0iU3IJ8A&)’
  378 |         t_p0.data = param_p2;
      |                     ^~~~~~~~
/tmp/nimcache/@mnim@slib@sstd@stypedthreads.nim.cpp:70:8: note: ‘tyObject_N__QM8RoNEnl77SyM0iU3IJ8A& tyObject_N__QM8RoNEnl77SyM0iU3IJ8A::operator=(const tyObject_N__QM8RoNEnl77SyM0iU3IJ8A&)’ is implicitly deleted because the default definition would be ill-formed:
   70 | struct tyObject_N__QM8RoNEnl77SyM0iU3IJ8A {
      |        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/tmp/nimcache/@mnim@slib@sstd@stypedthreads.nim.cpp: At global scope:
/tmp/nimcache/@mnim@slib@sstd@stypedthreads.nim.cpp:70:8: error: use of deleted function ‘std::atomic<long int>& std::atomic<long int>::operator=(const std::atomic<long int>&)’
In file included from /tmp/nimcache/@mnim@slib@sstd@stypedthreads.nim.cpp:8:
/usr/include/c++/14/atomic:881:15: note: declared here
  881 |       atomic& operator=(const atomic&) = delete;
      |               ^~~~~~~~
/tmp/nimcache/@mnim@slib@sstd@stypedthreads.nim.cpp:70:8: note: use ‘-fdiagnostics-all-candidates’ to display considered candidates
   70 | struct tyObject_N__QM8RoNEnl77SyM0iU3IJ8A {
      |        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/tmp/nimcache/@mnim@slib@sstd@stypedthreads.nim.cpp: In function ‘void createThread__m_u27(tyObject_Thread__nZr9anuXgjZYbdDHt5WUT9ag&, tyProc__wfITwjpjmvZY7CvJJ4a1Qw, tyObject_N__QM8RoNEnl77SyM0iU3IJ8A)’:
/tmp/nimcache/@mnim@slib@sstd@stypedthreads.nim.cpp:378:21: note: use ‘-fdiagnostics-all-candidates’ to display considered candidates
  378 |         t_p0.data = param_p2;
      |                     ^~~~~~~~
/tmp/nimcache/@mnim@slib@ssystem.nim.cpp: In function ‘void threadProcWrapDispatch__m_u65(tyObject_Thread__nZr9anuXgjZYbdDHt5WUT9ag*)’:
/tmp/nimcache/@mnim@slib@ssystem.nim.cpp:5729:50: error: use of deleted function ‘tyObject_N__QM8RoNEnl77SyM0iU3IJ8A& tyObject_N__QM8RoNEnl77SyM0iU3IJ8A::operator=(const tyObject_N__QM8RoNEnl77SyM0iU3IJ8A&)’
 5729 |                                 T4_ = (*thrd_p0).data;
      |                                                  ^~~~
/tmp/nimcache/@mnim@slib@ssystem.nim.cpp:334:8: note: ‘tyObject_N__QM8RoNEnl77SyM0iU3IJ8A& tyObject_N__QM8RoNEnl77SyM0iU3IJ8A::operator=(const tyObject_N__QM8RoNEnl77SyM0iU3IJ8A&)’ is implicitly deleted because the default definition would be ill-formed:
  334 | struct tyObject_N__QM8RoNEnl77SyM0iU3IJ8A {
      |        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/tmp/nimcache/@mnim@slib@ssystem.nim.cpp: At global scope:
/tmp/nimcache/@mnim@slib@ssystem.nim.cpp:334:8: error: use of deleted function ‘std::atomic<long int>& std::atomic<long int>::operator=(const std::atomic<long int>&)’
In file included from /tmp/nimcache/@mnim@slib@ssystem.nim.cpp:18:
/usr/include/c++/14/atomic:881:15: note: declared here
  881 |       atomic& operator=(const atomic&) = delete;
      |               ^~~~~~~~
/tmp/nimcache/@mnim@slib@ssystem.nim.cpp:334:8: note: use ‘-fdiagnostics-all-candidates’ to display considered candidates
  334 | struct tyObject_N__QM8RoNEnl77SyM0iU3IJ8A {
      |        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/tmp/nimcache/@mnim@slib@ssystem.nim.cpp: In function ‘void threadProcWrapDispatch__m_u65(tyObject_Thread__nZr9anuXgjZYbdDHt5WUT9ag*)’:
/tmp/nimcache/@mnim@slib@ssystem.nim.cpp:5729:50: note: use ‘-fdiagnostics-all-candidates’ to display considered candidates
 5729 |                                 T4_ = (*thrd_p0).data;
      |                                                  ^~~~
/tmp/nimcache/@mnim@slib@ssystem.nim.cpp:5731:35: error: use of deleted function ‘tyObject_N__QM8RoNEnl77SyM0iU3IJ8A::tyObject_N__QM8RoNEnl77SyM0iU3IJ8A(const tyObject_N__QM8RoNEnl77SyM0iU3IJ8A&)’
 5731 |                 (*thrd_p0).dataFn(x);
      |                                   ^
/tmp/nimcache/@mnim@slib@ssystem.nim.cpp:334:8: note: ‘tyObject_N__QM8RoNEnl77SyM0iU3IJ8A::tyObject_N__QM8RoNEnl77SyM0iU3IJ8A(const tyObject_N__QM8RoNEnl77SyM0iU3IJ8A&)’ is implicitly deleted because the default definition would be ill-formed:
  334 | struct tyObject_N__QM8RoNEnl77SyM0iU3IJ8A {
      |        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated due to -fmax-errors=3.

Expected Output

No invalid C++ codegen

Known Workarounds

No response

Additional Information

No response

[metagn]

Doesn't work with --mm:orc either, createThread tries to copy the param to the thread data.