From: nobu@...
Date: 2020-08-12T02:42:30+00:00
Subject: [ruby-core:99562] [Ruby master Bug#17108] error: initialization of ‘long unsigned int’ from ‘void *’ makes integer from pointer without a cast

Issue #17108 has been updated by nobu (Nobuyoshi Nakada).

Status changed from Open to Rejected
Description updated

`rb_funcall` expects a list of `VALUE`s after the number of arguments.
I think you'll want to write:

```C
    MQ_INT arity = VAL2INT(rb_funcall(val,NS(id_arity),0));
```
or use `rb_funcallv` instead of `rb_funcall`:
```C
    MQ_INT arity = VAL2INT(rb_funcallv(val,NS(id_arity),0,NULL));
```

----------------------------------------
Bug #17108: error: initialization of ���long unsigned int��� from ���void *��� makes integer from pointer without a cast
https://bugs.ruby-lang.org/issues/17108#change-87026

* Author: aotto1968 (Andreas Otto)
* Status: Rejected
* Priority: Normal
* ruby -v: ruby 2.7.1p83 (2020-03-31 revision a0c7c23c9c) [x86_64-linux-gnu]
* Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN
----------------------------------------
Hi, it seems that the "OPTIMIZATION" macro for "rb_funcall" make something "bad"

```
||   CC       rubymsgque_la-misc_ruby.lo
|| .../misc_ruby.c: In function ���rubymsgque_OtCheckCallable���:
.../misc_ruby.c|430 col 18| error: initialization of ���long unsigned int��� from ���void *��� makes integer from pointer without a cast [-Werror=int-conversion]
||    MQ_INT arity = VAL2INT(rb_funcall(val,NS(id_arity),0,NULL));
||                   ^~~~~~~
.../misc_ruby.c|430 col 18| note: (near initialization for ���rb_funcall_args[0]���)                                                                                                             
|| cc1: all warnings being treated as errors

MQ_INT arity = VAL2INT(rb_funcall(val,NS(id_arity),0,NULL));

#define VAL2INT(val)        (MQ_INT)NUM2INT(val)

ID NS(id_arity);

#if defined(__GNUC__) && defined(HAVE_VA_ARGS_MACRO) && defined(__OPTIMIZE__)
# define rb_yield_values(argc, ...) \
__extension__({ \
        const int rb_yield_values_argc = (argc); \
        const VALUE rb_yield_values_args[] = {__VA_ARGS__}; \
        const int rb_yield_values_nargs = \
            (int)(sizeof(rb_yield_values_args) / sizeof(VALUE)); \
        rb_yield_values2( \
            rb_varargs_argc_check(rb_yield_values_argc, rb_yield_values_nargs), \
            rb_yield_values_nargs ? rb_yield_values_args : NULL); \
    })

# define rb_funcall(recv, mid, argc, ...) \
__extension__({ \
        const int rb_funcall_argc = (argc); \
        const VALUE rb_funcall_args[] = {__VA_ARGS__}; \
        const int rb_funcall_nargs = \
            (int)(sizeof(rb_funcall_args) / sizeof(VALUE)); \
        rb_funcallv(recv, mid, \
            rb_varargs_argc_check(rb_funcall_argc, rb_funcall_nargs), \
            rb_funcall_nargs ? rb_funcall_args : NULL); \
    })
#endif
```



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