https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117602
Bug ID: 117602
Summary: bogus error with nested lambda
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: mpolacek at gcc dot gnu.org
Target Milestone: ---
This should compile in C++20:
```
void
g ()
{
[&](decltype([&](decltype([=](decltype([&](decltype([&]() {})) {})) {}))
{})){};
[&](decltype([&](decltype([&](decltype([&](decltype([&]() {})) {})) {}))
{})){};
[=](decltype([=](decltype([=](decltype([=](decltype([&]() {})) {})) {}))
{})){};
}
```
but we say:
error: non-local lambda expression cannot have a capture-default
