On Sun, May 07, 2017 at 01:33:46PM +0200, Juergen Sauermann wrote: > thanks, the backtrace below was very important. I believe that > I have found the reason now. SVN 945.
Thank you! It no longer happens in 945. In the meantime I could reconfirm the problem with g++ 5.2, 6.2, 6.3, but it didn't appear to occur with clang++ for some reason. It seemed that assignment attempted to free the memory previously freed in dtor call at Simple_string.hh:155. -k
