[llvm-bugs] [Bug 41139] New: Frontend crashes passing a function pointer/ref.s to template class constructor

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=41139

            Bug ID: 41139
           Summary: Frontend crashes passing a function pointer/ref.s to
                    template class constructor
           Product: clang
           Version: 7.0
          Hardware: PC
                OS: other
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++'17
          Assignee: unassignedclangbugs at nondot.org
          Reporter: yapoo777 at gmail.com
                CC: blitzrakete at gmail.com, erik.pilkington at gmail.com,
                    llvm-bugs at lists.llvm.org, richard-llvm at metafoo.co.uk

Created attachment 21628
  --> https://bugs.llvm.org/attachment.cgi?id=21628&action=edit
run script

Clang(7.0.1) frontend crashes to compile these constractors. 

//////////
int f1( unsigned ) { return 0; }

/////////
template <class R, class... Args>
struct S1 {
    S1( R(*f)(Args...) ) {}
//     S1( R(&f)(Args...) ) {}
//     S1( R(&&f)(Args...) ) {}
};

//////////
int main() {
    S1 s1( f1 );
 //   F1(f1);
    return 0;
}


invocation command line 
$ clang -std=c++17 a.cpp

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