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[Bug 1630906] Re: QML segfault on arm64 due to builder kernel change

 

I've now also asked on #ubuntu-kernel if CONFIG_ARM64_VA_BITS=48 is here
to stay for the 4.4 kernel or not, pointing to this bug. It sounds like
no-one is currently considering going back to the 4.2 kernel on the
arm64 builders at least.

Meanwhile I'm collecting rebuilds of qtdeclarative-abi-5-6-1 users to
the 2055 silo, although it won't help yakkety as such as it's being
released and the qtdeclarative update may not be SRU material.

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https://bugs.launchpad.net/bugs/1630906

Title:
  QML segfault on arm64 due to builder kernel change

Status in linux package in Ubuntu:
  Confirmed
Status in online-accounts-api package in Ubuntu:
  New
Status in qmenumodel package in Ubuntu:
  New
Status in qtdeclarative-opensource-src package in Ubuntu:
  New
Status in ubuntu-push-qml package in Ubuntu:
  New
Status in unity8 package in Ubuntu:
  New
Status in webbrowser-app package in Ubuntu:
  New

Bug description:
  Builders were changed from wily to xenial (4.4) kernel for arm64, and
  likely due to this the following kind of errors started happening:

  https://launchpadlibrarian.net/288487533/buildlog_ubuntu-yakkety-arm64
  .ubuntu-push-qml_0.1+15.10.20150826.1-0ubuntu2_BUILDING.txt.gz

  They happen when executing QML code.

  I've ruled out that reverting to previous qtbase and qtdeclarative
  versions don't affect this, so it's not coming from a Qt change. I've
  also verified there's no problem eg on our Bq tablet running the same
  tests on xenial+overlay. There are currently no found changes at least
  in Qt upstream to backport arm64 related fixes.

  Cause is unknown. But the same problem is there on vivid, xenial and yakkety builds:
  https://launchpadlibrarian.net/288516465/buildlog_ubuntu-yakkety-arm64.online-accounts-api_0.1+16.10.20161006.1-0ubuntu1_BUILDING.txt.gz
  https://launchpadlibrarian.net/288515705/buildlog_ubuntu-xenial-arm64.online-accounts-api_0.1+16.04.20161006.1-0ubuntu1_BUILDING.txt.gz
  https://launchpadlibrarian.net/288515510/buildlog_ubuntu-vivid-arm64.online-accounts-api_0.1+15.04.20161006.1-0ubuntu1_BUILDING.txt.gz

  This means it does not matter if it's Qt 5.4 or 5.6, GCC 4.9, 5 or 6,
  or glibc 2.21, 2.23 or 2.24.

  More logs from affected packages:
  https://launchpadlibrarian.net/288493058/buildlog_ubuntu-yakkety-arm64.qtdeclarative-opensource-src_5.6.1-7ubuntu3~1_BUILDING.txt.gz
  https://launchpadlibrarian.net/288347391/buildlog_ubuntu-xenial-arm64.webbrowser-app_0.23+16.04.20161005.1-0ubuntu1_BUILDING.txt.gz
  https://launchpadlibrarian.net/288385063/buildlog_ubuntu-vivid-arm64.qmenumodel_0.2.10+15.04.20161005.1-0ubuntu1_BUILDING.txt.gz

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References