https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111090
Bug ID: 111090
Summary: Bogus -Wuninitialized for trivial copy of nested
struct with partially initialized array
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ed at catmur dot uk
Target Milestone: ---
struct A {
A() { buf[0] = 0; }
int buf[2];
};
struct B { A a; };
struct C {
C(B const& b) : b(b) {}
B b;
};
struct D {
D(C c) : c(c) {}
C c;
};
D f() { return D(C(B())); }
In constructor 'C::C(const B&)',
inlined from 'D f()' at <source>:14:16:
<source>:7:21: warning: '<unnamed>.B::a.A::a[1]' is used uninitialized
[-Wuninitialized]
7 | C(B const& b) : b(b) {}
| ^~~~
<source>: In function 'D f()':
<source>:14:22: note: '<anonymous>' declared here
14 | D f() { return D(C(B())); }
| ^
This appears to have started in 7.1.
