https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65866
Bug ID: 65866
Summary: Wrong warning when using list-initialization:
operation on 'b' may be undefined [-Wsequence-point]
Product: gcc
Version: 5.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: o_kniemeyer at maxon dot net
This is related to Bug 51253: While that bug was about wrong compiled code and
is reported to be fixed, GCC 5.1.0 still produces a warning in code like
struct X
{
template <typename... ARGS> X(ARGS&&...);
};
void test()
{
bool b = false;
X{b = true, b = true};
}
warning: operation on 'b' may be undefined [-Wsequence-point]
Because list-initialization has to be done from left to right, the warning is
wrong.
