title: Sample example program to get the malloc consolidate error
body: <p>I want to test the mcheck functionality on my PC first to detect the malloc consolidate error.
  This way, i will be sure that this will help to figure out a similar crash on embedded-linux box. Unfortunately, the crash takes atleast 3-4 days. Thus, I am looking for a sample program that will generate the similar kind of crash as shown below.</p>
  
  <pre><code> Program terminated with signal 6, Aborted.
  #0  0x2c73ebb8 in __syscall_kill (pid=900, sig=6) at kill.c:15
  15  static inline _syscall2(int, __syscall_kill, __kernel_pid_t, pid,
  int, sig);
  Current language:  auto; currently c
  #0  0x2c73ebb8 in __syscall_kill (pid=900, sig=6) at kill.c:15
      __res = 716485696
      __err = 16
  #1  0x2c73eb5c in kill (pid=900, sig=6) at kill.c:19
  No locals.
  #2  0x2aafb2e0 in pthread_kill (thread=900, signo=6) at signals.c:73
      handle = (pthread_handle) 0x2ab3f2e0
      pid = 900
  #3  0x2aafbbb8 in raise (sig=6) at signals.c:241
      retcode = 6
  #4  0x2c730a5c in abort () at abort.c:94
      sigset = {__val = {32, 0 &lt;repeats 31 times&gt;}}
  #5  0x2c738054 in __malloc_consolidate (av=0x2c798860) at free.c:227
      fb = (mfastbinptr *) 0x2c798864
      maxfb = (mfastbinptr *) 0x2c798880
      p = (mchunkptr) 0x2c798894
      nextp = (mchunkptr) 0x4a2b2948
      unsorted_bin = (mchunkptr) 0x2c798894
      first_unsorted = (mchunkptr) 0x4a22f7e0
      nextchunk = (mchunkptr) 0x2c798894
      size = 0
      nextsize = 0
      prevsize = 0
      nextinuse = 1
      bck = (mchunkptr) 0x4a2b2948
      fwd = (mchunkptr) 0x4a2b2948
  #6  0x2c735ff0 in __malloc_inner (bytes=300) at malloc.c:912
      av = (mstate) 0x2c798860
      nb = 304
      idx = 32
      bin = (mbinptr) 0x2ac0dab4
      fb = (mfastbinptr *) 0x2ae11e50
      victim = (mchunkptr) 0x2ac0d9a4
      size = 719396432
      victim_index = 718311332
      remainder = (mchunkptr) 0x49759b58
      remainder_size = 40000
      block = 719396432
      bit = 718500504
      map = 719396432
      fwd = (mchunkptr) 0x1
      bck = (mchunkptr) 0x4a2164ac
      sysmem = (void *) 0x4975c9ac
  #7  0x2c736c18 in malloc (bytes=300) at malloc.c:1172
  </code></pre>