error when parsing valid C++23 code that uses class template argument deduction (CTAD) for std::function from a lambda expression.

[zaides-blackduck]

Issue Summary

when parsing valid C++23 code that uses class template argument deduction (CTAD) for std::function from a lambda expression. Issue reproducible on EDG-7.0 with GNU

Reproducing Source Code

`#include
#include
#include

struct Bar
{
std::string value;
};

struct Foo
{
Bar pickName() const { return Bar{"x"}; }
};

template
Bar invokeViaFunction(const std::shared_ptr& item)
{
constexpr auto exampleFn = [](const std::shared_ptr& ptr) -> Bar
{
return ptr->pickName();
};

auto fn = std::function{exampleFn};
return fn(item);

}

int main()
{
auto item = std::make_shared();
Bar result = invokeViaFunction(item);
return static_cast(result.value.size());
}`

Command-line Options

edgcpfe --g++ --gnu_version 150100 --c++23

Type of Issue

[Front End] This code SHOULD compile with these options.

Additional Details

No response

Reproducing (Standard) Configuration(s)

No response

Reproducing (Non-standard) Configuration

No response

I acknowledge that:

• I have checked open issues and existing discussions before filing this report.
• The reproducing source code that I have provided does not depend on headers that I have not included with my submission.
• I have reduced the reproducing source code to the best of my ability.
• I have selected at least one standard configuration or uploaded a non-standard configuration dump.
• I understand code shared via this form is NOT confidential.
• I have permission to share the reproducing source code and grant permission for the project to use the source code (or derivatives of the source code) to create tests.
• I agree that any tests created using the reproducing source code (or deriatives of it) will be licensed under project license unless I included a LICENSE.txt file in my .zip or .tar.gz upload. If I included a LICENSE.txt file, any tests created using the reproducing source code will be governed by the terms of the license I provided instead.