linuxdcpp-team team mailing list archive

[maksis <1656050@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

After updating zlib to version 1.2.10, transfers randomly fail because
of compression errors. Such errors happening on uploader's side won't
reported anywhere, the upload just gets disconnected.

Based on some debugging with AirDC++, the actual location where the
error happens in zlib is
https://github.com/madler/zlib/blob/master/deflate.c#L595

I'm not sure whether that's a bug in zlib or something intended as there
are also breaking changes in version 1.2.10:
https://github.com/madler/zlib/issues/190 (avail_out is not originally
zero when the call is made)

Setting compression level at
https://sourceforge.net/p/dcplusplus/code/ci/default/tree/dcpp/ZUtils.cpp#l59
to a non-zero value seems to help with avoiding the issue.

** Affects: airdcpp
     Importance: Undecided
         Status: New

** Affects: apexdc
     Importance: Undecided
         Status: New

** Affects: dcplusplus
     Importance: Undecided
         Status: New

** Also affects: airdcpp
   Importance: Undecided
       Status: New

** Also affects: apexdc
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1656050

Title:
  Compression errors with zlib 1.2.10

Status in AirDC++:
  New
Status in ApexDC++:
  New
Status in DC++:
  New

Bug description:
  After updating zlib to version 1.2.10, transfers randomly fail because
  of compression errors. Such errors happening on uploader's side won't
  reported anywhere, the upload just gets disconnected.

  Based on some debugging with AirDC++, the actual location where the
  error happens in zlib is
  https://github.com/madler/zlib/blob/master/deflate.c#L595

  I'm not sure whether that's a bug in zlib or something intended as
  there are also breaking changes in version 1.2.10:
  https://github.com/madler/zlib/issues/190 (avail_out is not originally
  zero when the call is made)

  Setting compression level at
  https://sourceforge.net/p/dcplusplus/code/ci/default/tree/dcpp/ZUtils.cpp#l59
  to a non-zero value seems to help with avoiding the issue.

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