[Bug c++/128534] New: internal compiler error: in get_string, at spellcheck-tree.h

[0599jiangyc at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=128534

            Bug ID: 128534
           Summary: internal compiler error: in get_string, at
                    spellcheck-tree.h
           Product: gcc
           Version: 17.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: 0599jiangyc at gmail dot com
  Target Milestone: ---

The following code:
```cpp
namespace N { }

template<decltype(^^int) R>
void g ()
{
  double d = [:R:]::template pi<double>;
}

void h () { g<^^N>(); }
```

Resulted in this output:
```
<source>:6:30: internal compiler error: in get_string, at spellcheck-tree.h:46
```

Trunk reproducer (`-std=c++26 -freflection`): https://godbolt.org/z/xesK5cbTY