[llvm-bugs] [Bug 39233] New: Segfault on initialization of class static variable with explicit instantiation

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=39233

            Bug ID: 39233
           Summary: Segfault on initialization of class static variable
                    with explicit instantiation
           Product: clang
           Version: 6.0
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: dehuan at motorola.com
                CC: dgregor at apple.com, llvm-bugs at lists.llvm.org

related:
https://bugs.llvm.org/show_bug.cgi?id=32714

When a class static variable is initialized 

Test code:
#include <iostream>
template<bool foo = true>
class Bar
{
public:
    static bool test1()
    {
        std::cout<<"test1: foo is "<<(foo?"true":"false")<<std::endl;
        return true;
    }
    static const bool dummy;
};

static bool test2()
{
    std::cout<<"test2 "<<std::endl;
    return true;
}

template<bool foo> 
const bool Bar<foo>::dummy 
    __attribute__ ((used))
        = Bar<foo>::test1();
      //= test2();// crash as well

template class Bar<false>;

int main()
{
    std::cout<<"test done"<<std::endl;
    return 0;
}

g++ (Ubuntu 7.3.0-27ubuntu1~18.04) 7.3.0 output:
test1: foo is false
test done

clang++ output
Segmentation fault (core dumped)

clang++ --version
clang version 6.0.0-1ubuntu2 (tags/RELEASE_600/final)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin

environment: ubuntu 18.04 x86-64

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