Comment 2 for bug 1341114

StacktraceTop:
 _IO_vfprintf_internal (s=s@entry=0x7fffb7ec1240, format=<optimized out>, format@entry=0x5dc4f5 "%lu", ap=ap@entry=0x7fffb7ec1378) at vfprintf.c:1614
 ___vsprintf_chk (s=s@entry=0x7fffb7ec1460 "\200\024\354\267\377\177", flags=flags@entry=1, slen=slen@entry=18446744073709551615, format=format@entry=0x5dc4f5 "%lu", args=args@entry=0x7fffb7ec1378) at vsprintf_chk.c:84
 vsprintf (__ap=0x7fffb7ec1378, __fmt=0x5dc4f5 "%lu", __s=0x7fffb7ec1460 "\200\024\354\267\377\177") at /usr/include/x86_64-linux-gnu/bits/stdio2.h:46
 make_formatted_string (buf=buf@entry=0x7fffb7ec1460 "\200\024\354\267\377\177", format=format@entry=0x5dc4f5 "%lu") at alloc.c:2202
 x_report_frame_params (alistptr=0x7fffb7ec1458, f=0x1196c00) at frame.c:3073