Memory leaks cv::kmeans in cv:grabCut

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Hello everyone,

I am using cv::grabcut to remove the background from the face photos, but it seems, that it ruins the code. I am using OpenCV 3.4.2 and valgrind is showing me following issue:

<?xml version="1.0"?>

<valgrindoutput>

<protocolversion>4</protocolversion>
<protocoltool>memcheck</protocoltool>

<preamble>
  <line>Memcheck, a memory error detector</line>
  <line>Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.</line>
  <line>Using Valgrind-3.13.0 and LibVEX; rerun with -h for copyright info</line>
  <line>Command: /home/ben/Development/OpenCV_tests/cmake-build-release/OpenCV_tests Orbik_3_combination</line>
</preamble>

<pid>23545</pid>
<ppid>765</ppid>
<tool>memcheck</tool>

<args>
  <vargv>
    <exe>/usr/bin/valgrind.bin</exe>
    <arg>--tool=memcheck</arg>
    <arg>--xml=yes</arg>
    <arg>--xml-file=/tmp/valgrind</arg>
    <arg>--gen-suppressions=all</arg>
    <arg>--leak-check=full</arg>
    <arg>--leak-resolution=med</arg>
    <arg>--track-origins=yes</arg>
  </vargv>
  <argv>
    <exe>/home/ben/Development/OpenCV_tests/cmake-build-release/OpenCV_tests</exe>
    <arg>Orbik_3_combination</arg>
  </argv>
</args>

<status>
  <state>RUNNING</state>
  <time>00:00:00:00.087 </time>
</status>


<status>
  <state>FINISHED</state>
  <time>00:00:42:50.777 </time>
</status>

<error>
  <unique>0xa65</unique>
  <tid>1</tid>
  <kind>Leak_PossiblyLost</kind>
  <xwhat>
    <text>2,576 bytes in 7 blocks are possibly lost in loss record 2,662 of 2,701</text>
    <leakedbytes>2576</leakedbytes>
    <leakedblocks>7</leakedblocks>
  </xwhat>
  <stack>
    <frame>
      <ip>0x4C31B25</ip>
      <obj>/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so</obj>
      <fn>calloc</fn>
    </frame>
    <frame>
      <ip>0x40134A6</ip>
      <obj>/lib/x86_64-linux-gnu/ld-2.27.so</obj>
      <fn>allocate_dtv</fn>
      <dir>/build/glibc-OTsEL5/glibc-2.27/elf/../elf</dir>
      <file>dl-tls.c</file>
      <line>286</line>
    </frame>
    <frame>
      <ip>0x40134A6</ip>
      <obj>/lib/x86_64-linux-gnu/ld-2.27.so</obj>
      <fn>_dl_allocate_tls</fn>
      <dir>/build/glibc-OTsEL5/glibc-2.27/elf/../elf</dir>
      <file>dl-tls.c</file>
      <line>530</line>
    </frame>
    <frame>
      <ip>0xBD86227</ip>
      <obj>/lib/x86_64-linux-gnu/libpthread-2.27.so</obj>
      <fn>allocate_stack</fn>
      <dir>/build/glibc-OTsEL5/glibc-2.27/nptl</dir>
      <file>allocatestack.c</file>
      <line>627</line>
    </frame>
    <frame>
      <ip>0xBD86227</ip>
      <obj>/lib/x86_64-linux-gnu/libpthread-2.27.so</obj>
      <fn>pthread_create@@GLIBC_2.2.5</fn>
      <dir>/build/glibc-OTsEL5/glibc-2.27/nptl</dir>
      <file>pthread_create.c</file>
      <line>644</line>
    </frame>
    <frame>
      <ip>0x8B2C044</ip>
      <obj>/usr/local/lib/libopencv_core.so.3.4.2</obj>
      <fn>cv::WorkerThread::WorkerThread(cv::ThreadPool&amp;, unsigned int)</fn>
    </frame>
    <frame>
      <ip>0x8B2D851</ip>
      <obj>/usr/local/lib/libopencv_core.so.3.4.2</obj>
      <fn>cv::ThreadPool::reconfigure_(unsigned int)</fn>
    </frame>
    <frame>
      <ip>0x8B2E7EC</ip>
      <obj>/usr/local/lib/libopencv_core.so.3.4.2</obj>
      <fn>cv::parallel_for_pthreads(cv::Range const&amp;, cv::ParallelLoopBody const&amp;, double)</fn>
    </frame>
    <frame>
      <ip>0x8B2A51C</ip>
      <obj>/usr/local/lib/libopencv_core.so.3.4.2</obj>
      <fn>cv::parallel_for_(cv::Range const&amp;, cv::ParallelLoopBody const&amp;, double)</fn>
    </frame>
    <frame>
      <ip>0x89E09FA</ip>
      <obj>/usr/local/lib/libopencv_core.so.3.4.2</obj>
      <fn>cv::kmeans(cv::_InputArray const&amp;, int, cv::_InputOutputArray const&amp;, cv::TermCriteria, int, int, cv::_OutputArray const&amp;)</fn>
    </frame>
    <frame>
      <ip>0x61FB3E4</ip>
      <obj>/usr/local/lib/libopencv_imgproc.so.3.4.2</obj>
      <fn>cv::grabCut(cv::_InputArray const&amp;, cv::_InputOutputArray const&amp;, cv::Rect_&lt;int&gt;, cv::_InputOutputArray const&amp;, cv::_InputOutputArray const&amp;, int, int)</fn>
    </frame> ...