MySQL Bugs: #42435: crash during starting workbench

Bug #42435	crash during starting workbench
Submitted:	28 Jan 2009 18:46	Modified:	1 Apr 2009 12:22
Reporter:	Susanne Ebrecht	Email Updates:
Status:	Closed	Impact on me:	None
Category:	MySQL Workbench	Severity:	S1 (Critical)
Version:	5.1.5	OS:	Linux (All)
Assigned to:		CPU Architecture:	Any

Description:
Start workbench -> Splashscreen shows up -> nothing else happens ... WB crashed

This only happens by building with debuild.

All works fine by using ./autogen.sh, ./configure, make, make install

But as far as you are buidling with debuild you will get this issue.

Workaround (for BASH):

1) tar xvzf <source package>
2)
$ cd mysql-workbench-5.1.5

$ export CFLAGS="-g -O0"
$ export CXXFLAGS="-g -O0"

$ debuild
$ cd ..
$ sudo dpkg -i <the deb package that was generated>
$ mysql-workbench &

The result of my deeper analysis was that -O2 is the problem here. All works fine by using -O0.

How to repeat:
1) download source
2) tar xvzf <source package>
3) cd mysql-workbench-5.1.5
4) debuild
5) cd ..
6) sudo dpkg -i <the deb package that was generated>
7) mysql-workbench

Because the splashscreen also won't disapear again it is necessary to restart X.

Suggested fix:
Looks like a NULL pointer invalidation.

With -O0 there will be a value from wherever that is used and with -O2 this value was optimised away.

as "short" workaround, you can use the debian-way:

"DEB_BUILD_OPTIONS=noopt debuild"  instead of just calling "debuild". This will set CFLAGS and CXXFLAGS to "-g -O0"

This bug is also repeatable on Ubuntu 8.10 amd64

I made some additional test.

The solution for this is to compile with: -fno-strict-aliasing

Great job investigating this, thanks! There are 2 places in WB with the type-punning problem and I was able to fix one of them. But the other one which involves GStaticMutex is harder and noone seems to have a real solution for it. The good news is I don't seem to get any problems from it...

Bug #39917 is set as duplicate of this bug here.

I compiled my fedora rpms using -O1 and mysql-workbench seems to run ok.  with -O2 I was not getting passed the splash screen.  this is on Fedora 10 x86_64

This will affect all OS because it is related to gcc.

This bug has been fixed and the avaiable version with the fix is 5.1.9-Beta which you are able to download here:

http://dev.mysql.com/downloads/workbench/5.1.html