ubuntu-sdk-bugs team mailing list archive

[Michael Zanetti <michael.zanetti@xxxxxxxxxxxxx>]

Public bug reported:

When the pages to be loaded by AdaptivePageLayout are heavy (say,
require a second to build up), the APL, because of his async nature by
default, still allows user interaction while creating the page.

If during that time the user triggers another action that would push something to the APL, it will break in two ways:
* the first page will leak in memory
* the second page is visible on the apl, but the back button in the header is missing


setting APL to asynchronous: false is a workaround for this as the user cannot trigger any more actions while the page is building up.

If you need an example to reproduce this, install "Guitar Tools" from
the store, edit its sources to remove the "asynchronous: false" from the
APL in there and launch the composer tool and quickly another entry from
the menu. The composer tool is the one that takes long to load, any
other entry can be used to trigger the bug.

I have also seen reports from users in other apps that the back button
in the header is missing sometimes. I am confident they are running into
the same issue.

** Affects: ubuntu-ui-toolkit (Ubuntu)
     Importance: Undecided
         Status: Confirmed

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https://bugs.launchpad.net/bugs/1647417

Title:
  AdaptivePageLayout breaks on loading heavy pages

Status in ubuntu-ui-toolkit package in Ubuntu:
  Confirmed

Bug description:
  When the pages to be loaded by AdaptivePageLayout are heavy (say,
  require a second to build up), the APL, because of his async nature by
  default, still allows user interaction while creating the page.

  If during that time the user triggers another action that would push something to the APL, it will break in two ways:
  * the first page will leak in memory
  * the second page is visible on the apl, but the back button in the header is missing

  
  setting APL to asynchronous: false is a workaround for this as the user cannot trigger any more actions while the page is building up.

  If you need an example to reproduce this, install "Guitar Tools" from
  the store, edit its sources to remove the "asynchronous: false" from
  the APL in there and launch the composer tool and quickly another
  entry from the menu. The composer tool is the one that takes long to
  load, any other entry can be used to trigger the bug.

  I have also seen reports from users in other apps that the back button
  in the header is missing sometimes. I am confident they are running
  into the same issue.

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