MySQL Bugs: #48520: cairo error: out of memory

Bug #48520	cairo error: out of memory
Submitted:	4 Nov 1:02	Modified:	18 Nov 18:29
Reporter:	Silvio Silva
Status:	Closed
Category:	MySQL Workbench	Severity:	S3 (Non-critical)
Version:	5.2.6alpha	OS:	Microsoft Windows (Windows 7)
Assigned to:	Mike Lischke	Target Version:	WB52
Triage:	D1 (Critical)

Description:
I've noticed a 'cairo error: out of memory' when changing my screen resolution

--
System info
MySQL Workbench OSS for Windows version 5.2.6
Cairo Version: 1.8.6
Rendering Mode: OpenGL requested (create a diagram to confirm)
OpenGL Driver Version: 3.2.0
OS: unknown
CPU: 8x Intel(R) Core(TM) i7 CPU         920  @ 2.67GHz, 6.0 GB RAM
Video adapter info:
Adapter type: NVIDIA GeForce GTX 260
Chip Type: GeForce GTX 260
BIOS String: Version 62.0.50.0.2
Video Memory: 917504 KB

How to repeat:
1. Open MySQL Workbench
2. Change Windows screen resolution
3. Mouse over Workbench sheet

Hi Silvio and thanks for your report.

Two of us tried (real HW and VM) and both can't reproduce said problem on Win7 x64.

Personally, I tried from 1400x1050 to 800x600, nothing weird happened. I think this might
be due to your configuration (both HW and drivers).

If you find any other way of reproducing this, please reopen the report.

I'll try on my laptop later, anyway on my desktop it only happens when I change to an
higher one.

Eg. 1024:768 -> 1280:960

Silvio, sorry for not being clear, I did go all the way back up from 800x600 to 1400x1050.
Unfortunately, VirtualBox does not allow me to test *all* resolutions but if problem
happens *only* at specific and single step I'd look into drivers.

I've tried to reproduce it with a smaller ERR (5 entities) and the error won't occur. It
only happens with a certain ERR (20+ entities 20+ relationships), not sure if it's only
on that ER or only on big ERRs

I've got the same problem on WindowsXP SP3 32bit. Same WB version.

It happens when the available space on the screen becomes bigger than the document size.
So if your diagram and the zoom factor is small enough, it's enough to close the sidebar
and open it again, for example. The "cairo: not enough memory" just keeps coming up,
effectively rendering the program unusable. Didn't happen in 5.1.

Daniel, this only shows how important it is to try and gather all of the data possible
when filing bug report... When can I expect such document attached and exact screen
resolution that will cause it to fail?

I was able to reproduce it on two other boxes w/different specs:
1. 'File' > 'New Model'
2. 'Model' > 'Add Diagram'
3. 'Model' > 'Diagram properties and size'
4. Set 'Width' & 'Height' to 1
5. Resize your working area to be bigger than the sheet
6. Do something (scroll, add object, etc)

Video at: http://www.youtube.com/watch?v=Yqks6twqrCw

Thanks Silvio.

Verified just as described in Silvio's video... Further more, VirtualBox GUI crashed so
badly that I wasn't able to recover it...

Fixed in 5.2 (rev 4542).

Thanks Mike.

cannot get that err anymore after fixing. fix will be included in 5.2.8

An entry was added to the 5.2.8 changelog:

When running MySQL Workbench the following error occurred when an attempt was made to
change the Windows screen resolution:

cairo error: out of memory