https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117855
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to fail| |15.0
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
With GCC 14.2.0 (with checking==release) with my reduced testcase:
```
<source>:9:15: error: class template argument deduction failed:
9 | this_span a = vec;
| ^~~
<source>:9:15: error: call of overloaded 'this_span(int&)' is ambiguous
<source>:2:23: note: candidate: 'this_span(T&&)-> this_span<T> [with T = int&]'
2 | template <typename T> span(T &&) -> span<T>;
| ^~~~
<source>:1:55: note: candidate: 'this_span(et&&)-> this_span<et, e> [with et =
int&; int e = -1]'
1 | template <typename T, int _Extent = -1> struct span { span(T&&);};
| ^~~~
<source>:7:23: note: candidate: 'this_span(T&&)-> this_span<T> [with T = int&]'
7 | template <typename T> this_span(T &&) -> this_span<T>;
| ^~~~~~~~~
```
With the trunk we checking ICE:
```
<source>:2:23: internal compiler error: tree check: accessed elt 2 of
'tree_vec' with 1 elts in tsubst, at cp/pt.cc:16533
2 | template <typename T> span(T &&) -> span<T>;
| ^~~~
```
