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* [Bug c++/88557] Lambda in template parameter list compiler segmentation fault (ICE)
       [not found] <bug-88557-4@http.gcc.gnu.org/bugzilla/>
@ 2021-08-07  1:42 ` pinskia at gcc dot gnu.org
  2024-04-14  0:08 ` pinskia at gcc dot gnu.org
  1 sibling, 0 replies; 2+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-08-07  1:42 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88557

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
           Keywords|ice-on-invalid-code         |ice-on-valid-code
   Last reconfirmed|                            |2021-08-07
             Status|UNCONFIRMED                 |NEW

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The first example works on the trunk.
The second example has an template missing but even adding that, the ICE is
still there.

^ permalink raw reply	[flat|nested] 2+ messages in thread
* [Bug c++/88557] Lambda in template parameter list compiler segmentation fault (ICE)
       [not found] <bug-88557-4@http.gcc.gnu.org/bugzilla/>
  2021-08-07  1:42 ` [Bug c++/88557] Lambda in template parameter list compiler segmentation fault (ICE) pinskia at gcc dot gnu.org
@ 2024-04-14  0:08 ` pinskia at gcc dot gnu.org
  1 sibling, 0 replies; 2+ messages in thread
From: pinskia at gcc dot gnu.org @ 2024-04-14  0:08 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88557

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |c++-lambda, rejects-valid
   Last reconfirmed|2021-08-07 00:00:00         |2024-4-13

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Now we are rejecting this valid C++17 code:
```
    template<int =  []()constexpr{ return 0; }()>
    void f() { }
```

With:
```
<source>:3:21: error: lambda-expression in template-argument only available
with '-std=c++2a' or '-std=gnu++2a'
    3 |     template<int =  []()constexpr{ return 0; }()>
      |                     ^
```

Because I would have assumed calling a constexpr lambda would be a valid C++17
code.

We even reject this and cause an ICE:
```
    template<int = [](auto)constexpr{ return 0; }.operator()(1)>
    void f() { }
```

But those examples are all valid C++17 due to constexpr'ness.

^ permalink raw reply	[flat|nested] 2+ messages in thread
end of thread, other threads:[~2024-04-14  0:08 UTC | newest]

Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
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     [not found] <bug-88557-4@http.gcc.gnu.org/bugzilla/>
2021-08-07  1:42 ` [Bug c++/88557] Lambda in template parameter list compiler segmentation fault (ICE) pinskia at gcc dot gnu.org
2024-04-14  0:08 ` pinskia at gcc dot gnu.org

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