StacktraceTop: _IO_vfprintf_internal (s=<optimized out>, format=<optimized out>, ap=<optimized out>) at vfprintf.c:1620 buffered_vfprintf (s=0x7ff846761800, format=<optimized out>, args=<optimized out>) at vfprintf.c:2260 _IO_vfprintf_internal (s=0x7ff846761800, format=0x414b28 "Could not open event device '%s'.", ap=0x7fff1219a808) at vfprintf.c:1306 ___fprintf_chk (fp=0x7ff846761800, flag=1, format=<optimized out>) at fprintf_chk.c:37 fprintf (__fmt=<optimized out>, __stream=<optimized out>) at /usr/include/bits/stdio2.h:98
StacktraceTop: internal (s=<optimized out>, format=<optimized out>, ap=<optimized out>) at vfprintf.c:1620 internal (s=0x7ff846761800, format=0x414b28 "Could not open event device '%s'.", ap=0x7fff1219a808) at vfprintf.c:1306 bits/stdio2. h:98
_IO_vfprintf_
buffered_vfprintf (s=0x7ff846761800, format=<optimized out>, args=<optimized out>) at vfprintf.c:2260
_IO_vfprintf_
___fprintf_chk (fp=0x7ff846761800, flag=1, format=<optimized out>) at fprintf_chk.c:37
fprintf (__fmt=<optimized out>, __stream=<optimized out>) at /usr/include/