Comment 2 for bug 1275357

StacktraceTop:
 sigorset (dest=0x798, left=0x798, right=0x6) at sigorset.c:30
 __GI_qsort_r (b=0x798, n=1944, s=6, cmp=0xffffffffffffffff, arg=0x0) at msort.c:175
 malloc_printerr (ptr=0x2f, str=0x7f0bde9154c4 "malloc(): memory corruption", action=262144) at malloc.c:4927
 _int_malloc (av=0x2f99240, bytes=<optimized out>) at malloc.c:3402
 ?? ()