https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108975
Patrick Palka <ppalka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[10/11/12/13 Regression] |[10/11/12/13 Regression]
|ICE on constexpr variable |ICE on constexpr variable
|used as nontype template |used as nontype template
|since |since
|e32fc4499f863fe0fa81767d11f |r9-5473-ge32fc4499f863f
|40ad2f1ab1668 |
--- Comment #12 from Patrick Palka <ppalka at gcc dot gnu.org> ---
(In reply to Patrick Palka from comment #11)
> Started with r268016
... aka r9-5473-ge32fc4499f863f.
More reduced testcase:
template<class T>
void f() {
constexpr int dim = 1;
auto f = [&] {
int n[dim * 1];
};
}
template void f<int>();
<stdin>: In instantiation of ‘void f() [with T = int]’:
<stdin>:9:22: required from here
<stdin>:5:11: internal compiler error: in lookup_template_class, at
cp/pt.cc:10080
We similarly crash when using a generic lambda:
template<class T>
void f() {
constexpr int dim = 1;
auto f = [&] (auto) {
int n[dim * 1];
};
f(0);
}
template void f<int>();
In either case, since dim is a constant variable we should prune the implicit
capture of it and sizeof(f) should be 1.
