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Preparing to unpack .../g++-4.8_4.8.4-2ubuntu1~14.04.1_i386.deb ...
Unpacking g++-4.8 (4.8.4-2ubuntu1~14.04.1) over (4.8.4-2ubuntu1~14.04) ...
dpkg-deb (subprocess): decompressing archive member: lzma error: compressed data is corrupt
dpkg-deb: error: subprocess <decompress> returned error exit status 2
dpkg: error processing archive /var/cache/apt/archives/g++-4.8_4.8.4-2ubuntu1~14.04.1_i386.deb (--unpack):
 cannot copy extracted data for './usr/lib/gcc/i686-linux-gnu/4.8/cc1plus' to '/usr/lib/gcc/i686-linux-gnu/4.8/cc1plus.dpkg-new': unexpected end of file or stream