https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65985
Bug ID: 65985
Summary: compiler segfault with assert() in constexpr
constructor body
Product: gcc
Version: 5.1.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: rhalbersma at gmail dot com
Target Milestone: ---
The following code segfaults with -std=c++1y for g++ 5.1.0 and trunk 20150502
on the combination of constexpr and assert() in the constructor body (removing
either the constexpr keyword everywhere or the assert() will compile cleanly).
#include <cassert>
class Angle
{
int degrees = 0;
constexpr auto invariant() const noexcept
{
return 0 <= degrees && degrees < 360;
}
public:
explicit constexpr Angle(int n) noexcept
:
degrees{n % 360}
{
assert(invariant());
}
/* implicit */ constexpr operator auto() const noexcept
{
return degrees;
}
};
int main()
{
static_assert(Angle{360} == 0, "");
}
This code correctly compiles with -std=c++14 from Clang 3.3 and higher.
