Calling a var-param-proc results in gcc error #18080
Description
Calling a var-param'd proc with a certain object construction results in a gcc error.
Example
type
Foo = object
discard
Bar = object
x: Foo
proc baz(state: var Bar) = discard
baz((ref Bar)(x: Foo())[])Current Output
$ gcc --version
gcc (Debian 10.2.1-6) 10.2.1 20210110
Copyright (C) 2020 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Hint: used config file '/etc/nim/nim.cfg' [Conf]
Hint: used config file '/etc/nim/config.nims' [Conf]
....CC: initializer_element_is_not_constant.nim
/home/outhquin/.cache/nim/initializer_element_is_not_constant_d/@minitializer_element_is_not_constant.nim.c:54:87: error: initializer element is not constant
54 | static NIM_CONST tyObject_Bar__GgKelZxvGOIwRl5q7fQcEA* TM__ErwDwTejKczskj5eQoYo4w_2 = TM__ErwDwTejKczskj5eQoYo4w_2;
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
Error: execution of an external compiler program 'gcc -c -w -fmax-errors=3 -I/usr/lib/nim -I/home/outhquin -o /home/outhquin/.cache/nim/initializer_element_is_not_constant_d/@minitializer_element_is_not_constant.nim.c.o /home/outhquin/.cache/nim/initializer_element_is_not_constant_d/@minitializer_element_is_not_constant.nim.c' failed with exit code: 1
$ nim --version
Nim Compiler Version 1.4.2 [Linux: amd64]
Compiled at 2021-05-13
Copyright (c) 2006-2020 by Andreas Rumpf
active boot switches: -d:release
$ ~/Nim/bin/nim c initializer_element_is_not_constant.nim
Hint: used config file '/home/outhquin/Nim/config/nim.cfg' [Conf]
Hint: used config file '/home/outhquin/Nim/config/config.nims' [Conf]
....
CC: stdlib_assertions.nim
CC: stdlib_system.nim
CC: initializer_element_is_not_constant.nim
/home/outhquin/.cache/nim/initializer_element_is_not_constant_d/@minitializer_element_is_not_constant.nim.c:42:87: error: initializer element is not constant
42 | static NIM_CONST tyObject_Bar__GgKelZxvGOIwRl5q7fQcEA* TM__ErwDwTejKczskj5eQoYo4w_2 = TM__ErwDwTejKczskj5eQoYo4w_2;
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
Error: execution of an external compiler program 'gcc -c -w -fmax-errors=3 -I/home/outhquin/Nim/lib -I/home/outhquin -o /home/outhquin/.cache/nim/initializer_element_is_not_constant_d/@minitializer_element_is_not_constant.nim.c.o /home/outhquin/.cache/nim/initializer_element_is_not_constant_d/@minitializer_element_is_not_constant.nim.c' failed with exit code: 1
$ ~/Nim/bin/nim --version
Nim Compiler Version 1.5.1 [Linux: amd64]
Compiled at 2021-05-24
Copyright (c) 2006-2021 by Andreas Rumpf
git hash: d217888e5679aff063668930bd00892c4f5cb2b3
active boot switches: -d:release
$ ./env.sh nim c ../initializer_element_is_not_constant.nim
Hint: system [Processing]
Hint: widestrs [Processing]
Hint: io [Processing]
Hint: initializer_element_is_not_constant [Processing]
CC: stdlib_system.nim
CC: initializer_element_is_not_constant.nim
/home/outhquin/.cache/nim/initializer_element_is_not_constant_d/@minitializer_element_is_not_constant.nim.c:44:87: error: initializer element is not constant
44 | static NIM_CONST tyObject_Bar__GgKelZxvGOIwRl5q7fQcEA* TM__ErwDwTejKczskj5eQoYo4w_2 = TM__ErwDwTejKczskj5eQoYo4w_2;
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
Error: execution of an external compiler program 'gcc -c -w -I/home/outhquin/nimbus-eth2/vendor/nimbus-build-system/vendor/Nim/lib -I/home/outhquin -o /home/outhquin/.cache/nim/initializer_element_is_not_constant_d/@minitializer_element_is_not_constant.nim.c.o /home/outhquin/.cache/nim/initializer_element_is_not_constant_d/@minitializer_element_is_not_constant.nim.c' failed with exit code: 1
$ ./env.sh nim --version
Nim Compiler Version 1.2.12 [Linux: amd64]
Compiled at 2021-05-23
Copyright (c) 2006-2020 by Andreas Rumpf
git hash: 121628357ec7fae91335bd392f03b0e6dd249319
active boot switches: -d:release
Expected Output
Not a gcc error.
Additional Information
Issue #18079 is related, but different, because it constructs the Foo-type object differently and results in a SIGSEGV rather than a gcc error.