[Bug 2153527] Re: Upgrade to 26.04 CPP-14-x86-64 failure checksum error

[symdeb]

Files were provided. Still incomplete ?

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https://bugs.launchpad.net/bugs/2153527

Title:
  Upgrade to 26.04 CPP-14-x86-64  failure checksum error

Status in ubuntu-release-upgrader package in Ubuntu:
  Incomplete

Bug description:
  During Upgrade process error is reported:

  Could not install /tmp/aot-dpkg-install-I9UXnt/33-cpp-14-x86-64-lunyx-gnu-14.3.0-14ubuntu1_admd64.deb
  package may not be in a working state, please consider submutting a bug report about it.

  Cannot copy extrata data to //usrlibexec/gcc/x86_64-lunux-gnu/cc1 to
  /usr/libexec/gcc/x86_64-linux/cc1.dbpg-new : unexpected end of file or
  stream

  After reboot cannot resolve the error with dbpg --configure etc..

  
   upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
  Need to get 0 B/11.9 MB of archives.
  After this operation, 8,192 B of additional disk space will be used.
  Do you want to continue? [Y/n] y
  (Reading database… 632952 files and directories currently installed.)
  Preparing to unpack …/cpp-14-x86-64-linux-gnu_14.3.0-14ubuntu1_amd64.deb…
  Unpacking cpp-14-x86-64-linux-gnu (14.3.0-14ubuntu1) over (14.3.0-8ubuntu1)…
  dpkg-deb (subprocess): decompressing archive '/var/cache/apt/archives/cpp-14-x86-64-linux-gnu_14.3.0-14ubuntu1_amd64.deb' (size=11866708) member 'data.tar': zstd error: Restored data doesn't match checksum
  dpkg-deb: error: <decompress> subprocess failed with exit status 2
  dpkg: error processing archive /var/cache/apt/archives/cpp-14-x86-64-linux-gnu_14.3.0-14ubuntu1_amd64.deb (--unpack):
   cannot copy extracted data for './usr/libexec/gcc/x86_64-linux-gnu/14/cc1' to '/usr/libexec/gcc/x86_64-linux-gnu/14/cc1.dpkg-new': unexpected end of file or stream
  Errors were encountered while processing:
   /var/cache/apt/archives/cpp-14-x86-64-linux-gnu_14.3.0-14ubuntu1_amd64.deb
  E: Sub-process /usr/bin/dpkg returned an error code (1)

  Why does Ubuntu not re-download the package if there is corruption ? 
  Why does Ubuntu not check the checksum after download ?
  How to fix this.

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