Possible memory leak in cvtColor with TBB support [closed]

edit

Dear all,

I'm running some tests with cvtColor and valgrind reports a memory leak.

Some information about the environment:

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 14.04.2 LTS
Release:    14.04
Codename:   trusty

$ uname --all
Linux <hidden> 3.16.0-34-generic #47~14.04.1-Ubuntu SMP Fri Apr 10 17:49:16 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

$ pkg-config --modversion opencv
2.4.8

$ g++ --version
g++ (Ubuntu 4.8.4-2ubuntu1~14.04) 4.8.4
Copyright (C) 2013 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$ valgrind --version
valgrind-3.10.0.SVN

This is a short standalone sample:

$ cat test.cpp 
#include <iostream>
#include <opencv2/core/core.hpp>
#include <opencv2/imgproc/imgproc.hpp>

int main()
{
    std::cout << cv::getBuildInformation() << std::endl;

    cv::Mat src = cv::Mat::zeros(5, 5, CV_8UC3);
    cv::Mat dst;

    cv::cvtColor( src, dst, CV_BGR2GRAY );
}


$ g++ -Wall -Wextra -Werror -Weffc++ -ansi -pedantic -O2 test.cpp -o test  $(pkg-config --cflags --libs opencv) 
<nothing printed on screen>

And the output from valgrind:

$ valgrind --leak-check=full ./test 
==15342== Memcheck, a memory error detector
==15342== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==15342== Using Valgrind-3.10.0.SVN and LibVEX; rerun with -h for copyright info
==15342== Command: ./test
==15342== 

General configuration for OpenCV 2.4.8 =====================================
  Version control:               unknown

  Platform:
    Host:                        Linux 3.2.0-58-generic x86_64
    CMake:                       2.8.12.2
    CMake generator:             Unix Makefiles
    CMake build tool:            /usr/bin/make
    Configuration:               Release

  C/C++:
    Built as dynamic libs?:      YES
    C++ Compiler:                /usr/bin/x86_64-linux-gnu-g++  (ver 4.8.2)
    C++ flags (Release):         -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2    -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -ffunction-sections -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security  -DNDEBUG
    C++ flags (Debug):           -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2    -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -ffunction-sections -g  -O0 -DDEBUG -D_DEBUG
    C Compiler:                  /usr/bin/x86_64-linux-gnu-gcc
    C flags (Release):           -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2    -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wno-narrowing -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -ffunction-sections -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security  -DNDEBUG
    C flags (Debug):             -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2    -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wno-narrowing -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -ffunction-sections -g  -O0 -DDEBUG -D_DEBUG
    Linker flags (Release):      -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now
    Linker ...