Ok so it definetly was related to the -O2 optimization setting. After
seriously debugging the problem, its still very unclear what happened.
All of these problems stem from the x11 server. On the client side the
errors are in a function called process_events. The error are stored
in a  xError struct, which stores its errors as integers that I can't
totally decode without some guessing. My best guess as to the error is
a BadMatch Error. So like I stated before glXMakeCurrent was last in a
long line of errors given by the code. The first was actually in a
call XInternAtom. Interestingly the call succeeds but the error is
still raised. Which error is still a bit of a mystery to me. Why it
raises the error though is the real mystery. Another smaller mystery
is why the XErrorHandler isn't handling these errors.

On Mon, Jun 1, 2009 at 4:18 AM, Tristam MacDonald<[email protected]> wrote:
> On Mon, Jun 1, 2009 at 5:47 AM, Alex Holkner <[email protected]> wrote:
>>
>> On 01/06/2009, at 5:05 PM, Shawn Krisman <[email protected]>
>> wrote:
>>
>> > So I compiled a debug version of the glx libraries to really find out
>> > what was going on. The results where ridiculously strange. First I
>> > have never seen anything like this in gdb. It looked some of the code
>> > was just randomly going back a few instructions every once in a while.
>> > Except not randomly because every time I went through the debugger it
>> > moved in the same way every time, very very strange. I should also
>> > note that gdb didn't say anything about switching functions or
>> > threads. Also important to note is that when it moves back it also
>> > resets to the state it was before the newer instructions.
>>
>> Sounds like you had optimisation flags enabled when you compiled the
>> library.
>
>
> That could also be either exception handling (if C++), or the related C
> construct using setjmp/longjmp.
> --
> Tristam MacDonald
> http://swiftcoder.wordpress.com/
>
> >
>

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