Backport important bugfix to Bionic

[Nate Graham]

https://github.com/LMDB/lmdb/commit/1ffe472a080fcd3c7dab6e352848703ad7adbe14 is an upstream fix for the LMDB database that fixes the most common crash in the KDE Baloo file indexing daemon: https://bugs.kde.org/show_bug.cgi?id=389848 (currently at 42 duplicates).

We should consider backporting this commit to the version shipped in Bionic to improve reliability for our LTS users.

[Impact]

 * Repeated crash in Baloo file indexer, used in Kubuntu by default and in KDE snaps

[Test Case]

 * balooctl disable && balooctl enable
 * [no more crashes in lmdb::mdb_cursor_put()]

[Regression Potential]

 * No regression potential observed; the fix is already in the wild and has not caused any regressions on rolling release distros, or other distros like openSUSE that have already incorporated this patch

[Other Info]

 * Nothing relevant.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Jonathan Riddell (jr)]

Uploaded lmdb_0.9.21-1ubuntu2~bionic18.04 to bionic-proposed awaiting approval

[Brian Murray (brian-murray)]

Is this already fixed in Disco and Cosmic?

[Brian Murray (brian-murray)]

I did the detective work myself since I'm such a nice guy. This is fixed in Disco but not in Ubuntu 18.10. It should be fixed there too.

[Brian Murray (brian-murray)]

An upload of lmdb to bionic-proposed has been rejected from the upload queue for the following reason: "This also needs fixing in Ubuntu 18.10, please upload a fix for that release too.".

[Jonathan Riddell (jr)]

Uploaded lmdb_0.9.21-1ubuntu2~bionic18.04_source.changes
Uploaded lmdb_0.9.22-1ubuntu1~cosmic18.10_source.changes

(I also uploaded a lmdb_0.9.22-1ubuntu1~bionic18.10_source.changes which is just a wrong version number and can be rejected)

[Brian Murray (brian-murray)]

Hello Nate, or anyone else affected,

Accepted lmdb into cosmic-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/lmdb/0.9.22-1ubuntu0.1 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 on 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 add a comment to this bug, mentioning the version of the package you tested and change the tag from verification-needed-cosmic to verification-done-cosmic. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-cosmic. In either case, without details of your testing we will not be able to proceed.

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

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

[Brian Murray (brian-murray)]

Hello Nate, or anyone else affected,

Accepted lmdb into bionic-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/lmdb/0.9.21-1ubuntu0.1 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 on 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 add a comment to this bug, mentioning the version of the package you tested and change the tag from verification-needed-bionic to verification-done-bionic. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-bionic. In either case, without details of your testing we will not be able to proceed.

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

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

[Nate Graham (pointedstick)]

I tested liblmdb0/cosmic-proposed 0.9.22-1ubuntu0.1 amd64 in Kubuntu Cosmic. No crashes were observed! \o/

[Nate Graham (pointedstick)]

Also tested liblmdb0/bionic-proposed 0.9.21-1ubuntu0.1 amd64 with the same positive result.

[Launchpad Janitor (janitor)]

This bug was fixed in the package lmdb - 0.9.22-1ubuntu0.1

---------------
lmdb (0.9.22-1ubuntu0.1) cosmic-proposed; urgency=medium

  * Add ubuntu_01_remove_loose_pg_from_dirty_list_in_freelist_save.diff
  * Fixes common crash in Baloo file indexer
  * SRU LP: #1812122

 -- Jonathan Riddell <email address hidden> Thu, 28 Feb 2019 15:52:40 +0000

[Łukasz Zemczak (sil2100)]

The verification of the Stable Release Update for lmdb has completed successfully and the package has now been released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.

[Launchpad Janitor (janitor)]

This bug was fixed in the package lmdb - 0.9.21-1ubuntu0.1

---------------
lmdb (0.9.21-1ubuntu0.1) bionic-proposed; urgency=medium

  * Add ubuntu_01_remove_loose_pg_from_dirty_list_in_freelist_save.diff
  * Fixes common crash in Baloo file indexer
  * SRU LP: #1812122

 -- Jonathan Riddell <email address hidden> Thu, 21 Feb 2019 16:59:57 +0000

[Nate Graham (pointedstick)]

Yay, thanks so much everyone!