title: python corrupted double-linked list error
body: <p>i am a python 2.7 and ubuntu 16.04 user and i have unexpected error when try to excute some python scripts .
  i use pycharm and i have the some error when i try to run python script from the ubuntu terminal.
  the error :</p>
  
  <pre><code>*** Error in `/usr/bin/python2.7': corrupted double-linked list: 0x0b83c880 ***
  </code></pre>
  
  <p>the error  message :</p>
  
  <pre><code>======= Backtrace: =========
  /lib/i386-linux-gnu/libc.so.6(+0x67377)[0xb764b377]
  /lib/i386-linux-gnu/libc.so.6(+0x6d2f7)[0xb76512f7]
  /lib/i386-linux-gnu/libc.so.6(+0x6e2f1)[0xb76522f1]
  /usr/lib/i386-linux-gnu/libstdc++.so.6(_ZdlPv+0x18)[0xb6ba9d88]
  /usr/lib/libgdal.so.1(_ZN15GDALMajorObjectD0Ev+0x22)[0xb075a582]
  /usr/lib/libgdal.so.1(GDALClose+0x77)[0xb074d747]
  /usr/lib/qgis/plugins/libgdalprovider.so(+0xa930)[0xa4888930]
  /usr/lib/qgis/plugins/libgdalprovider.so(+0xaafa)[0xa4888afa]
  /usr/lib/libqgis_core.so.2.18.3(_ZN13QgsRasterPipeD1Ev+0x75)[0xb3d6a7d5]
  /usr/lib/libqgis_core.so.2.18.3(_ZN14QgsRasterLayerD1Ev+0x2f)[0xb3d5cd0f]
  /usr/lib/python2.7/dist-packages/qgis/_core.i386-linux-gnu.so(_ZN17sipQgsRasterLayerD1Ev+0x3b)[0xb489dd2b]
  /usr/lib/python2.7/dist-packages/qgis/_core.i386-linux-gnu.so(_ZN17sipQgsRasterLayerD0Ev+0x1a)[0xb489dd5a]
  /usr/lib/python2.7/dist-packages/qgis/_core.i386-linux-gnu.so(+0x43df45)[0xb4883f45]
  /usr/lib/python2.7/dist-packages/qgis/_core.i386-linux-gnu.so(+0x43df8a)[0xb4883f8a]
  /usr/lib/python2.7/dist-packages/sip.i386-linux-gnu.so(+0x5d49)[0xb724dd49]
  /usr/lib/python2.7/dist-packages/sip.i386-linux-gnu.so(+0xc19b)[0xb725419b]
  /usr/bin/python2.7[0x8144aad]
  /usr/bin/python2.7[0x80fd127]
  /usr/bin/python2.7(PyDict_SetItem+0x478)[0x80e9268]
  /usr/bin/python2.7(_PyModule_Clear+0xba)[0x8149a1a]
  /usr/bin/python2.7(PyImport_Cleanup+0x37a)[0x81495ca]
  /usr/bin/python2.7(Py_Finalize+0x99)[0x8147399]
  /usr/bin/python2.7(Py_Main+0x4bd)[0x80e639d]
  /usr/bin/python2.7(main+0x26)[0x80e5ec6]
  /lib/i386-linux-gnu/libc.so.6(__libc_start_main+0xf7)[0xb75fc637]
  /usr/bin/python2.7[0x80e5dc8]
  ======= Memory map: ========
  08048000-0838f000 r-xp 00000000 08:01 1583892    /usr/bin/python2.7
  08390000-08391000 r--p 00347000 08:01 1583892    /usr/bin/python2.7
  08391000-083f1000 rw-p 00348000 08:01 1583892    /usr/bin/python2.7
  083f1000-08406000 rw-p 00000000 00:00 0 
  0a0f7000-0ba69000 rw-p 00000000 00:00 0          [heap]
  a03e0000-a03eb000 r-xp 00000000 08:01 1049930    /lib/i386-linux-gnu/libnss_files-2.23.so
  a03eb000-a03ec000 r--p 0000a000 08:01 1049930    /lib/i386-linux-gnu/libnss_files-2.23.so
  a03ec000-a03ed000 rw-p 0000b000 08:01 1049930    /lib/i386-linux-gnu/libnss_files-2.23.so
  a03ed000-a03f3000 rw-p 00000000 00:00 0 
  a03f3000-a03fe000 r-xp 00000000 08:01 1048664    /lib/i386-linux-gnu/libnss_nis-2.23.so
  a03fe000-a03ff000 r--p 0000a000 08:01 1048664    /lib/i386-linux-gnu/libnss_nis-2.23.so
  a03ff000-a0400000 rw-p 0000b000 08:01 1048664    /lib/i386-linux-gnu/libnss_nis-2.23.so
  a0400000-a0421000 rw-p 00000000 00:00 0 
  a0421000-a0500000 ---p 00000000 00:00 0 
  a0509000-a0520000 r-xp 00000000 08:01 1048674    /lib/i386-linux-gnu/libnsl-2.23.so
  a0520000-a0521000 r--p 00016000 08:01 1048674    /lib/i386-linux-gnu/libnsl-2.23.so
  a0521000-a0522000 rw-p 00017000 08:01 1048674    /lib/i386-linux-gnu/libnsl-2.23.so
  a0522000-a0524000 rw-p 00000000 00:00 0 
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  a052c000-a052d000 r--p 00007000 08:01 1048675    /lib/i386-linux-gnu/libnss_compat-2.23.so
  a052d000-a052e000 rw-p 00008000 08:01 1048675    /lib/i386-linux-gnu/libnss_compat-2.23.so
  a054a000-a054b000 ---p 00000000 00:00 0 
  a054b000-a10cb000 rw-p 00000000 00:00 0 
  a10cb000-a10d4000 r-xp 00000000 08:01 150141     /usr/lib/i386-linux-gnu/qt4/plugins/iconengines/libqsvgicon.so
  a10d4000-a10d5000 r--p 00008000 08:01 150141     /usr/lib/i386-linux-gnu/qt4/plugins/iconengines/libqsvgicon.so
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  a10d6000-a1296000 rw-p 00000000 00:00 0 
  a1296000-a12a5000 r-xp 00000000 08:01 283552     /usr/lib/python2.7/dist-packages/scipy/stats/mvn.i386-linux-gnu.so
  a12a5000-a12a6000 ---p 0000f000 08:01 283552     /usr/lib/python2.7/dist-packages/scipy/stats/mvn.i386-linux-gnu.so
  a12a6000-a12a7000 r--p 0000f000 08:01 283552     /usr/lib/python2.7/dist-packages/scipy/stats/mvn.i386-linux-gnu.so
  a12a7000-a12a8000 rw-p 00010000 08:01 283552     /usr/lib/python2.7/dist-packages/scipy/stats/mvn.i386-linux-gnu.so
  a12a8000-a139f000 rw-p 00000000 00:00 0 
  a139f000-a13a8000 r-xp 00000000 08:01 283553     /usr/lib/python2.7/dist-packages/scipy/stats/statlib.i386-linux-gnu.so
  a13a8000-a13a9000 ---p 00009000 08:01 283553     /usr/lib/python2.7/dist-packages/scipy/stats/statlib.i386-linux-gnu.so
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  a13ab000-a13eb000 rw-p 00000000 00:00 0 
  a13eb000-a13f8000 r-xp 00000000 08:01 283548     /usr/lib/python2.7/dist-packages/scipy/stats/_rank.i386-linux-gnu.so
  a13f8000-a13f9000 r--p 0000c000 08:01 283548     /usr/lib/python2.7/dist-packages/scipy/stats/_rank.i386-linux-gnu.so
  a13f9000-a13fb000 rw-p 0000d000 08:01 283548     /usr/lib/python2.7/dist-packages/scipy/stats/_rank.i386-linux-gnu.so
  a13fb000-a147b000 rw-p 00000000 00:00 0 
  a147b000-a148e000 r-xp 00000000 08:01 283509     /usr/lib/python2.7/dist-packages/scipy/stats/vonmises_cython.i386-linux-gnu.so
  a148e000-a148f000 r--p 00012000 08:01 283509     /usr/lib/python2.7/dist-packages/scipy/stats/vonmises_cython.i386-linux-gnu.so
  a148f000-a1490000 rw-p 00013000 08:01 283509     /usr/lib/python2.7/dist-packages/scipy/stats/vonmises_cython.i386-linux-gnu.so
  a1490000-a1510000 rw-p 00000000 00:00 0 
  a1510000-a1519000 r-xp 00000000 08:01 534502     /usr/lib/python2.7/dist-packages/scipy/optimize/_nnls.i386-linux-gnu.so
  a1519000-a151a000 r--p 00008000 08:01 534502     /usr/lib/python2.7/dist-packages/scipy/optimize/_nnls.i386-linux-gnu.so
  a151a000-a151b000 rw-p 00009000 08:01 534502     /usr/lib/python2.7/dist-packages/scipy/optimize/_nnls.i386-linux-gnu.so
  a151b000-a1539000 r-xp 00000000 08:01 534537     /usr/lib/python2.7/dist-packages/scipy/optimize/_lsq/givens_elimination.i386-linux-gnu.so
  a1539000-a153a000 r--p 0001d000 08:01 534537     /usr/lib/python2.7/dist-packages/scipy/optimize/_lsq/givens_elimination.i386-linux-gnu.so
  a153a000-a153c000 rw-p 0001e000 08:01 534537     /usr/lib/python2.7/dist-packages/scipy/optimize/_lsq/givens_elimination.i386-linux-gnu.so
  a153c000-a1562000 r-xp 00000000 08:01 534554     /usr/lib/python2.7/dist-packages/scipy/optimize/_group_columns.i386-linux-gnu.so
  a1562000-a1563000 r--p 00025000 08:01 534554     /usr/lib/python2.7/dist-packages/scipy/optimize/_group_columns.i386-linux-gnu.so
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  a1565000-a157b000 r-xp 00000000 08:01 534540     /usr/lib/python2.7/dist-packages/scipy/optimize/_minpack.i386-linux-gnu.so
  a157b000-a157c000 r--p 00015000 08:01 534540     /usr/lib/python2.7/dist-packages/scipy/optimize/_minpack.i386-linux-gnu.so
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  a157d000-a1592000 r-xp 00000000 08:01 534543     /usr/lib/python2.7/dist-packages/scipy/optimize/_slsqp.i386-linux-gnu.so
  a1592000-a1593000 r--p 00014000 08:01 534543     /usr/lib/python2.7/dist-packages/scipy/optimize/_slsqp.i386-linux-gnu.so
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  a1594000-a15ad000 r-xp 00000000 08:01 534495     /usr/lib/python2.7/dist-packages/scipy/optimize/_cobyla.i386-linux-gnu.so
  a15ad000-a15ae000 r--p 00018000 08:01 534495     /usr/lib/python2.7/dist-packages/scipy/optimize/_cobyla.i386-linux-gnu.so
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  a15b9000-a15f9000 rw-p 00000000 00:00 0 
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  a1689000-a168a000 r--p 0008f000 08:01 412052     /usr/lib/python2.7/dist-packages/scipy/sparse/linalg/eigen/arpack/_arpack.i386-linux-gnu.so
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  a242b000-a242c000 r--p 00060000 08:01 147376     /usr/lib/python2.7/dist-packages/matplotlib/_qhull.i386-linux-gnu.so
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  a2447000-a2448000 r--p 00018000 08:01 147399     /usr/lib/python2.7/dist-packages/matplotlib/_tri.i386-linux-gnu.so
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  a2449000-a2509000 rw-p 00000000 00:00 0 
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  a252f000-a2530000 r--p 00025000 08:01 147142     /usr/lib/python2.7/dist-packages/matplotlib/_image.i386-linux-gnu.so
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  a2531000-a25b2000 rw-p 00000000 00:00 0 
  a25b2000-a25bf000 r-xp 00000000 08:01 147249     /usr/lib/python2.7/dist-packages/matplotlib/_contour.i386-linux-gnu.so
  a25bf000-a25c0000 r--p 0000c000 08:01 147249     /usr/lib/python2.7/dist-packages/matplotlib/_contour.i386-linux-gnu.so
  a25c0000-a25c1000 rw-p 0000d000 08:01 147249     /usr/lib/python2.7/dist-packages/matplotlib/_contour.i386-linux-gnu.so
  a25c1000-a260c000 r-xp 00000000 08:01 146816     /usr/lib/python2.7/dist-packages/PIL/_imaging.i386-linux-gnu.so
  a260c000-a260e000 r--p 0004a000 08:01 146816     /usr/lib/python2.7/dist-packages/PIL/_imaging.i386-linux-gnu.so
  a260e000-a2610000 rw-p 0004c000 08:01 146816     /usr/lib/python2.7/dist-packages/PIL/_imaging.i386-linux-gnu.so
  a2610000-a2690000 rw-p 00000000 00:00 0 
  a2690000-a26a1000 r-xp 00000000 08:01 147230     /usr/lib/python2.7/dist-packages/matplotlib/ft2font.i386-linux-gnu.so
  a26a1000-a26a2000 ---p 00011000 08:01 147230     /usr/lib/python2.7/dist-
  bf8e6000-bf907000 rw-p 00000000 00:00 0          [stack]
  </code></pre>