https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87814
Bug ID: 87814
Summary: [9 Regression] ICE in in tsubst_copy, at cp/pt.c:15962
with range-v3
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: Casey at Carter dot net
Target Milestone: ---
Created attachment 44932
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44932&action=edit
Preprocessed repro
This program (preprocessed repro attached as repro.i.gz):
#include <range/v3/iterator_range.hpp>
#include <range/v3/view/join.hpp>
#include <range/v3/view/transform.hpp>
int main() {
using namespace ranges;
auto f = [](int) { return iterator_range<int*>(); };
join_view<transform_view<int(&)[42], decltype(f)>> rng;
(void) rng.begin();
}
ICEs in tsubst_copy while instantiating a variadic inherited constructor
template that performs a "double" pack expansion, defined around line 43341 in
the repro.
