[Bug c/82283] Wrong warning with -Wmissing-field-initializers

[yann at droneaud dot fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82283

Yann Droneaud <yann at droneaud dot fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |yann at droneaud dot fr

--- Comment #3 from Yann Droneaud <yann at droneaud dot fr> ---
I'm experiencing the same issue in multiple cases, even with latest GCC trunk
(10.x).

I believe the following code is C99 conformant, but still trigger an unexpected
warning:

    struct a {
        int b;
    };

    struct c {
        struct a d;
        int e;
    };

    void f(struct c *);

    void g(void) {
        struct c h = {.d = (struct a){0}};
        f(&h);
    }

It produces the following warning:

    <source>: In function 'g':
    <source>:10:30: error: missing initializer for field 'e' of 'struct c'
[-Weror=missing-field-initializers]
       10 |   struct c h = {.d = (struct a){0}};
          |                              ^
    <source>:6:7: note: 'e' declared here
        6 |   int e;
          |       ^
    cc1: all warnings being treated as errors
    Compiler returned: 1

See https://godbolt.org/z/vQLYRX