https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79865
Bug ID: 79865
Summary: Crash when calling member function with template
parameter from generic lambda
Product: gcc
Version: 6.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: gufideg at gmail dot com
Target Milestone: ---
Created attachment 40882
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=40882&action=edit
GCC Version
Inputting this code makes GCC crash on the call of `crashIt`:
#include <tuple>
struct Subject {
using Types = std::tuple<int, double>;
};
struct Test {
template<typename T>
void test() {
test<T>(std::make_index_sequence<std::tuple_size<typename
T::Types>::value>{});
}
template<typename T, std::size_t... S>
void test(std::index_sequence<S...>) {
int unpack[] = {(static_cast<void>([&](auto i){
using Type = std::tuple_element_t<i, typename T::Types>;
crashIt<Type>(); // Here's the crash!
}(std::integral_constant<std::size_t, S>{})), 0)..., 0};
(void)unpack;
}
template<typename>
void crashIt() {}
};
int main(){
Test{}.test<Subject>();
}
Not using a lambda in the expansion of `S` make the code compile.
This code compile fine under Clang 3.9.1.
The complete GCC version is in the attachement.
