#0  0x61040f76 in map::get_list_by_fd(int) (this=0x604425d0, fd=-1) at /src/winsup/cygwin/mmap.cc:398
#1  0x610413be in mmap64 (addr=0x0, len=15732736, prot=3, flags=34, fd=-1, off=0) at /src/winsup/cygwin/mmap.cc:525
#2  0x61041a19 in mmap (addr=0x0, len=15732736, prot=3, flags=34, fd=-1, off=0) at /src/winsup/cygwin/mmap.cc:613
#3  0x610964b4 in sYSMALLOc(unsigned, malloc_state*) (nb=15728648, av=0x6112d0b0) at /src/winsup/cygwin/malloc.cc:3069
#4  0x61096723 in dlmalloc (bytes=0) at /src/winsup/cygwin/malloc.cc:3722
#5  0x6103f416 in malloc (size=15728640) at /src/winsup/cygwin/malloc_wrapper.cc:131
#6  0x004010ba in main () at expb.c:6