https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82283
Bug ID: 82283
Summary: Wrong warning with -Wmissing-field-initializers
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: etienne.doms at gmail dot com
Target Milestone: ---
See the following code:
/*
* gcc bug.c -Wextra -c
*/
struct A {
int *a;
int b;
};
union B {
struct A a;
};
union B data1 = {
.a.a = & (int) { 0 },
.a.b = 0
};
union B data2 = {
.a.b = 0,
.a.a = & (int) { 0 }
};
This triggers to the following warnings, reported on "data1" initialization:
bug.c:16:5: warning: missing initializer for field 'b' of 'struct A'
[-Wmissing-field-initializers]
.a.b = 0
^
bug.c:7:9: note: 'b' declared here
int b;
^
Interestingly, there is no warning on "data2" initialization, which should be
exactly the same.
Got this issue on the Ubuntu 16.04 stock GCC (5.4.0), the issue is also present
with GCC 7.2.
