[Bug 837145] Re: Memory leak in pango_layout_get_extents

[Chris Halse Rogers]

Hello Tim, or anyone else affected,

Accepted pango1.0 into precise-proposed. The package will build now and
be available at
http://launchpad.net/ubuntu/+source/pango1.0/1.30.0-0ubuntu3.1 in a few
hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to
enable and use -proposed.  Your feedback will aid us getting this update
out to other Ubuntu users.

If this package fixes the bug for you, please change the bug tag from
verification-needed to verification-done.  If it does not, change the
tag to verification-failed.  In either case, details of your testing
will help us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: pango1.0 (Ubuntu Precise)
       Status: In Progress => Fix Committed

** Tags added: verification-needed

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https://bugs.launchpad.net/bugs/837145

Title:
  Memory leak in pango_layout_get_extents

Status in Pango - Layout and Text Rendering LIbrary:
  Fix Released
Status in Unity:
  Invalid
Status in “pango1.0” package in Ubuntu:
  Fix Released
Status in “unity” package in Ubuntu:
  Invalid
Status in “pango1.0” source package in Precise:
  Fix Committed
Status in “unity” source package in Precise:
  Invalid

Bug description:
  Impact: there is a memory leak when using pango_layout_get_extents

  Development Fix: the bug has been fixed in quantal

  Stable Fix: simple patch accepted upstream at
  https://bugzilla.gnome.org/show_bug.cgi?id=678059

  Regression Potential: could potentially cause other bugs

  Test Case:
  - Run the following code in a terminal (feel free to check the result of the GET first)
  {{{
  for size in 100 200 500; do
    echo With size $size
    GET https://bugzilla.gnome.org/attachment.cgi?id=216360 | sed s/100/$size/ > pango_leak.c 
    gcc pango_leak.c `pkg-config --cflags --libs pangoft2` -o pango_leak
    valgrind ./pango_leak 2>&1 | grep ' lost' | cut -d" " -f 2-
  done;
  }}}

  Observe that before the fix the possibly lost reported grows
  significantly which different loop counts, and that after the fix it
  does not.

  -- End test case

  Valgrind found a leak deep in the nested calls for
  'pango_layout_get_extents'.

  It appears to be not freeing something.

  4,224 (512 direct, 3,712 indirect) bytes in 1 blocks are definitely lost
  1,904 (768 direct, 1,136 indirect) bytes in 1 blocks are definitely lost
  1,904 (768 direct, 1,136 indirect) bytes in 1 blocks are definitely lost

  This from an hour long valgrind run.

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