[llvm-bugs] [Bug 25430] New: Crush on choosing operator () of parent lambda in derived class

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=25430

            Bug ID: 25430
           Summary: Crush on choosing operator () of parent lambda in
                    derived class
           Product: clang
           Version: 3.7
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: tomilovanatoliy at gmail.com
                CC: dgregor at apple.com, llvm-bugs at lists.llvm.org
    Classification: Unclassified

Code:

#include <iostream>
#include <type_traits>

#include <cstdlib>

template< bool condition >
void
f()
{
    auto static_if = [] (auto... l)
    {
        struct S : std::decay_t< decltype(l) >...
        {
            //using std::decay_t< decltype(l) >::operator ();
            S(decltype(l)... _l) : std::decay_t< decltype(l) >{_l}... { ; }
        } s{l...};
        return s;
    };
    static_if([] (std::true_type) { std::cout << 1 << std::endl; }, []
(std::false_type) { std::cout << 2 << std::endl; })(std::integral_constant<
bool, condition >{});
}

int
main()
{ 
    f< true >();
    f< false >();
    return EXIT_SUCCESS;
}

Build command:

clang++ -std=gnu++1z -stdlib=libc++ -O3 -Wall -Wextra -Weverything -pedantic
-Wno-c++98-compat -Wno-c++98-compat-pedantic -Wno-c++98-compat main.cpp -o
a.out && ./a.out

Error message:

clang: error: unable to execute command: Segmentation fault (core dumped)
clang: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 3.7.0 (tags/RELEASE_370/final 246979)
Target: x86_64-unknown-linux-gnu
Thread model: posix
clang: note: diagnostic msg: PLEASE submit a bug report to
http://llvm.org/bugs/ and include the crash backtrace, preprocessed source, and
associated run script.
clang: note: diagnostic msg: 
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang: note: diagnostic msg: /tmp/main-1305dd.cpp
clang: note: diagnostic msg: /tmp/main-1305dd.sh
clang: note: diagnostic msg: 

********************

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