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opencv_perf_objdetect "OCL_Cascade_*" tests fail since commit ad70ab40 #6293

@sander1234567890

Description

@sander1234567890

When running opencv_perf_objdetect all haarcascade tests fail with the exception below.
This was introduced in commit ad70ab4, if i checkout 1 commit before that the tests run fine.

Time compensation is 0
CTEST_FULL_OUTPUT
OpenCV version: 3.1.0-dev
OpenCV VCS version: 3.1.0-315-gecf65a0-dirty
Build type: release
Parallel framework: pthreads
CPU features: mmx sse sse2 sse3
OpenCL Platforms:
    Clover
        iGPU: AMD TAHITI (DRM 2.43.0, LLVM 3.7.1) (OpenCL 1.1 MESA 11.1.2)
Current OpenCL device:
    Type = iGPU
    Name = AMD TAHITI (DRM 2.43.0, LLVM 3.7.1)
    Version = OpenCL 1.1 MESA 11.1.2
    Compute units = 28
    Max work group size = 256
    Local memory size = 32 kB
    Max memory allocation size = 256 MB
    Double support = Yes
    Host unified memory = Yes
    Has AMD Blas = No
    Has AMD Fft = No
    Preferred vector width char = 16
    Preferred vector width short = 8
    Preferred vector width int = 4
    Preferred vector width long = 2
    Preferred vector width float = 4
    Preferred vector width double = 2
[==========] Running 28 tests from 2 test cases.
[----------] Global test environment set-up.


[ RUN      ] OCL_Cascade_Image_MinSize_CascadeClassifier.CascadeClassifier/3
OpenCV Error: Assertion failed (u->origdata == data) in deallocate, file /usr/src/opencv/modules/core/src/ocl.cpp, line 4584
/usr/src/opencv/modules/ts/src/ts_perf.cpp:1721: Failure
Failed
Expected: PerfTestBody() doesn't throw an exception.
  Actual: it throws cv::Exception:
  /usr/src/opencv/modules/core/src/ocl.cpp:4584: error: (-215) u->origdata == data in function deallocate

params    = ("cv/cascadeandhog/cascades/haarcascade_frontalface_alt.xml", "cv/cascadeandhog/images/bttf301.png", 30)
termination reason:  unhandled exception
bytesIn   =     240950
bytesOut  =          0
samples   =         10 of 100
outliers  =          0
frequency = 1000000000
min       =   16528436 = 16.53ms
median    =   16943004 = 16.94ms
gmean     =   16932285 = 16.93ms
gstddev   = 0.02050919 = 2.08ms for 97% dispersion interval
mean      =   16935514 = 16.94ms
stddev    =     351309 = 0.35ms
[  FAILED  ] OCL_Cascade_Image_MinSize_CascadeClassifier.CascadeClassifier/3, where GetParam() = ("cv/cascadeandhog/cascades/haarcascade_frontalface_alt.xml", "cv/cascadeandhog/images/bttf301.png", 30) (236 ms)

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