https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110681
Bug ID: 110681
Summary: bogus warning -Wreturn-type for lambda in tparam list
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: eric.niebler at gmail dot com
Target Milestone: ---
The following valid C++20 code causes gcc trunk to erroneously warn about a
missing return statement.
template <auto X = []{}>
constexpr auto y = X;
template <class T>
using C = decltype(y<>);
using D = C<int>;
<source>: In substitution of 'template<class T> using C = decltype (y<<lambda>
>) [with T = int]':
<source>:27:18: required from here
<source>:21:22: warning: no return statement in function returning non-void
[-Wreturn-type]
21 | template <auto X = []{}>
| ^~~~
Compiler returned: 0
