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From: "johelegp at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/107033] [13 Regression] [modules] ICE using span as a range
Date: Sun, 25 Sep 2022 17:12:39 +0000
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Version: 13.0
X-Bugzilla-Keywords: ice-on-valid-code, rejects-valid
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107033

--- Comment #4 from Johel Ernesto Guerrero Pe=C3=B1a <johelegp at gmail dot=
 com> ---
This is actually Bug 106826.

Simplest: https://godbolt.org/z/oKT4x9r4G.

```C++
template<class> constexpr bool is =3D false;
template<class T> constexpr bool is<T&> =3D true;
```

```C++
export module mod;
import "std.hpp";
static_assert(is<int&>);
```

```
mod.cpp:1:8: internal compiler error: Segmentation fault
    1 | export module mod;
      |        ^~~~~~
0x234bd6e internal_error(char const*, ...)
        ???:0
0xc84cfe walk_specializations(bool, void (*)(bool, spec_entry*, void*), voi=
d*)
        ???:0
0xbead4c depset::hash::add_specializations(bool)
        ???:0
0xbfb5a8 module_state::write_begin(elf_out*, cpp_reader*, module_state_conf=
ig&,
unsigned int&)
        ???:0
0xbfcd45 finish_module_processing(cpp_reader*)
        ???:0
0xb89d2e c_parse_final_cleanups()
        ???:0
0xdb0cc8 c_common_parse_file()
        ???:0
```=