[Bug c/64480] New: List designated initializer triggers -Wmissing-field-initializers

["petr.pisar at atlas dot cz" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64480

            Bug ID: 64480
           Summary: List designated initializer triggers
                    -Wmissing-field-initializers
           Product: gcc
           Version: 4.8.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: petr.pisar at atlas dot cz

This code:

struct lower {
    char *foo;
    char *bar;
};

struct upper {
    struct lower inner;
};

int main (void) {
    struct upper u = {
        /* This triggers -Wmissing-field-initializers warning */
        .inner.foo = "Foo",
        .inner.bar = "Bar",

        /* While this passes: 
        .inner = {
            .foo = "Foo",
            .bar = "Bar",
        },
        */
    };

    (void)u;

    return 0;
}


Triggers warning about initialized lower.bar field:

$ gcc -Wall -Wextra -std=c99 -O0 -g test.c
test.c: In function ‘main’:
test.c:14:9: warning: missing initializer for field ‘bar’ of ‘struct lower’
[-Wmissing-field-initializers]
         .inner.bar = "Bar",
         ^
test.c:3:11: note: ‘bar’ declared here
     char *bar;
           ^

If I change to initialization from the list form (.inner.foo=) to nested
(.inner={.foo=}), then it passes. The change is commented out in the quoted
code.

I think the list syntax is valid per C99, 6.7.9 Initialization grammar.
>From gcc-bugs-return-472115-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Jan 03 15:48:02 2015
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/60255] [OOP] Deferred character length variable at (1) cannot yet be associated with unlimited polymorphic entities
Date: Sat, 03 Jan 2015 15:48:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id`255

janus at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |rejects-valid
             Status|NEW                         |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |vehre at gmx dot de
            Summary|[oop] Deferred character    |[OOP] Deferred character
                   |length variable at (1)      |length variable at (1)
                   |cannot yet be associated    |cannot yet be associated
                   |with unlimited polymorphic  |with unlimited polymorphic
                   |entities                    |entities