Searching in the HUD freezes unity

Bug Description

[Test Case]
1. Install feedindicator http://go.3v1n0.net/MqDhar
2. Add the http://planet.ubuntu.com rss feed to it
3. Open the HUD
4. Write the letter "f"
-> Verify that the HUD and system is responsive

[Regression Potential]
Broken HUD size and layouting.

Original description:

Since unity revision 2374 [1] the HUD can hang when just searching for a small string.
In my setup (where I've indicators with big menu items, like the ones that feedindicator provides), I get it basically doing this:

<prerequisite>
- Install feedindicator http://go.3v1n0.net/MqDhar
- Add http://planet.ubuntu.com rss feed to it
</prerequisite>

1) Open the HUD
2) Write "f"

This is enough to make my HUD and unity to hang.

As you can see on the attached stacktrace, basically the interface is looping calling ComputeContentSize.
For your information, The loop doesn't happen if removing the SetBaseSize call on StaticCairoText::PreLayoutManagement() (it's not a fix, of course).

[1] http://bazaar.launchpad.net/~unity-team/unity/trunk/revision/2374

This bug was fixed in the package unity - 6.0.0-0ubuntu1

---------------
unity (6.0.0-0ubuntu1) quantal-proposed; urgency=low

[ Didier Roche ]
* debian/rules, debian/control, debian/unity-autopilot.install:
- install new unity-autopilot package, containing autopilot bindings and
test for Unity
- add some python build-dep for executing setup.py
- use dh_python2 and add some python:Depends dep for automatic python
version detection
* debian/control:
- remove gnome-desktop dependency: not needed upstream anymore
- unity Breaks older lenses due to path change
- remove libgdu in build-dep
* debian/libunity-core-6.0-5.install, debian/libunity-core-6.0-dev.install,
debian/control:
- version bump in libunity-core, change soname

[ Matthieu Baerts (matttbe) ]
* Update apport hook for python3 ; thanks to Edward Donovan (LP: #1013171)

[ Łukasz 'sil2100' Zemczak ]
* New upstream release.
- compiz crashed with SIGSEGV in get_current_slide() from
unity::BGHash::OnSlideshowTransition() (LP: #889625)
- Unity is visible on top of fullscreen apps (LP: #734908)
- App icon on the Unity Launcher lost track of running instance
(LP: #772063)
- unity crashed with NameError in reset_unity_compiz_profile(): global
name 'GError' is not defined (LP: #778470)
- compiz crashed with SIGSEGV in CompWindow::id() from getPaintMask()
[compizminimizedwindowhandler.h] from unity::UnityWindow::glPaint()
(LP: #851982)
- HUD - Formatting of text in the auto-complete is wrong (LP: #939436)
- [regression] Launcher is silent to screen reader users (LP: #949448)
- still some accent issues with unity/nux (LP: #950740)
- [regression] [precise] 3D apps run much slower under Unity (LP: #987304)
- No launcher icon or Alt+Tab entry for Gimp windows (LP: #995916)
- Locked smuxi launcher icon does not indicate smuxi running status
(LP: #999820)
- When number of workspaces is set to 1, the Spread no longer works
(LP: #996604)
- Much slower OpenGL frame rates with unityshell loaded, than plain compiz
(LP: #988079)
- Port to libudisks2 (LP: #1012000)
- Desktop, Launcher and menu bar still visible when screen locked
(LP: #886605)
- Searching in the HUD freezes unity (LP: #1016239)
- Dragged icons rendered under dash (LP: #1021541)
- Regression in Launcher keyboard navigation (with Alt+F1) (LP: #1021549)
- Unity dash is is much slower/laggy after revision 2469. (LP: #1021665)
- Dash and Launcher - As soon as a user starts dragging a file from the
Dash, there is a 'flicker' before the Launcher icons that are valid drop
receptacles re-saturate (LP: #863230)
- Dash - when a file is dragged from the Dash (Dash home, file lens, or
music lens) and dropped on a Launcher icon, the Dash should
automatically close (LP: #865168)
- Refreshing active blur makes the dash painfully slow (LP: #874230)
- Open dash, press Alt+f1 - dash remains open (LP: #919209)
- application reopens itself when last instance is closed from
windows/application switcher (LP: #926406)
- HUD D...

Fixed for me :)

Hello Marco, or anyone else affected,

Accepted unity into precise-proposed. The package will build now and be available at http://launchpad.net/ubuntu/+source/unity/5.14.0-0ubuntu1 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!

This bug was fixed in the package unity - 5.14.0-0ubuntu1

---------------
unity (5.14.0-0ubuntu1) precise-proposed; urgency=low

* New upstream release.
- Unity launcher shows internal partitions after they have been unmounted
(LP: #994163)
- can't click to dismiss hud in the area where dynamic hud results are
meant to appear (LP: #962651)
- Spread/Scale should exit if Dash is invoked (LP: #944033)
- Searching in the HUD freezes unity (LP: #1016239)
- Dash - The search bar gets the focus when pressing invalid keys
(LP: #931393)
- unity crashed with NameError in reset_unity_compiz_profile(): global name
'GError' is not defined (LP: #778470)
- When number of workspaces is set to 1, the Spread no longer works
(LP: #996604)
- compiz crashed with SIGSEGV in CompWindow::id() from getPaintMask()
from unity::UnityWindow::glPaint() (LP: #851982)
- "Keyboard Shortcuts" overlay can cause annoyance (LP: #934062)
- padding between last quicklist item and bottom edge is non-deterministic
(changes randomly) (LP: #955158)
- HUD Draws improperly while searching for results (LP: #932531)
- compiz crashed with SIGSEGV in
unity::ui::KeyboardUtil::GetKeycodeAboveKeySymbol() (LP: #920258)
- Launcher - when a user starts dragging a item, any folded launcher icons
that are valid drop receptacles should unfold (LP: #839717)
- Dragging image from firefox/chrome to dock causes lagg/freeze
(LP: #772445)
- dash should open when pressing "super" in scale mode (LP: #1023811)
- Multimonitor, Launcher - When the Launcher is set to autohide and
'Sticky edges' are turned off, 'Launcher Edge Stop Overcome Pressure'
seems to be broken when revealing the Launcher (LP: #987955)
- Software Center add to launcher icon animation is delayed when the
launcher is in auto-hide mode (LP: #1012896)
- Purchased items are not being added to the Unity launcher (LP: #925014)
- Unity Launcher Fails To Auto-Hide When Enabled & Installing Commercial
Software (LP: #1002440)
- Regression: shift+click on a launcher icon to open a new application
instance gone (LP: #754565)
- Regression: Installing apps causes a terrible visual glitch-- have to
restart X.org. (LP: #981168)
- Duplicated applications icons on quick application restart (LP: #1003574)
- HUD - Formatting of text in the auto-complete is wrong (LP: #939436)
- alt-backtick flickers between windows (LP: #987156)
- [Hud] The result grid is not drawn in proximity of the search entry
(LP: #1008603)
- Dash and Launcher - As soon as a user starts dragging a file from the
Dash, there is a 'flicker' before the Launcher icons that are valid drop
receptacles re-saturate (LP: #863230)
- [hud] The last button is not rounded (LP: #1008656)
- Hud flickers when show up (LP: #1011507)
- Dash maximise button changed location (LP: #987674)
- launcher reordering "line" doesn't go to the bottom slot (LP: #971421)
- Dash/HUD should close on "Spread" (LP: #870284)
- Nothing should be written into the dash/hud searchbar whe...