#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000564a97d3105b in inline_mysql_cond_wait (src_file=0x564a98383b88 "/home/hartmut/projects/mariadb/releases/mariadb-10.2.1/sql/mysqld.cc", src_line=6324, 
    mutex=0x564a98b87240 <LOCK_thread_count>, that=0x564a98b86b40 <COND_thread_count>)
    at /home/hartmut/projects/mariadb/releases/mariadb-10.2.1/include/mysql/psi/mysql_thread.h:1149
#2  bootstrap (file=<optimized out>) at /home/hartmut/projects/mariadb/releases/mariadb-10.2.1/sql/mysqld.cc:6324
#3  0x0000564a97d3ac37 in mysqld_main (argc=14, argv=0x7f5e87c7c4e8) at /home/hartmut/projects/mariadb/releases/mariadb-10.2.1/sql/mysqld.cc:5965
#4  0x00007f5e88fac830 in __libc_start_main (main=0x564a97d1cc10 <main(int, char**)>, argc=11, argv=0x7fff6b209d38, init=<optimized out>, fini=<optimized out>, 
    rtld_fini=<optimized out>, stack_end=0x7fff6b209d28) at ../csu/libc-start.c:291
#5  0x0000564a97d2e669 in _start ()