Hi,
the recent crashes in kdeinit4 were resolved (send flowers to ade who found out 
the cause first).

They were caused by the use of '-xalias_level=compatible' flag in qt, which we 
did not use globally before. As a quick counter-measure I've removed the flag 
from our includes.

After reading about it in the Studio User's Guide I think it's quite a 
dangerous flag to use on a code that is not under our control and I am not sure 
if the performance benefits would outweigh increased risk of weird crashes.

So please do comment on this.

Should we go with this flag as global, only disabling it when we find an issue 
(I'd say this is what Ben is proposing), or should we remove it from the global 
flags and only add it to packages that have been tested with it or their code 
has been reviewed (I hope there's some lint-like tool for that) ?

Would the use of the flag be worth going as far as patching the code (and 
maintaining the patches and possibly reporting the patches upstream)?
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