safety fix for analysis in assigned builtin methods optimisation
safety fix for analysis in assigned builtin methods optimisation

--HG--
extra : rebase_source : 8a7842eea9d10b4e8054ed3782e0efdc2b2ce02c

hhsprings/cython,ABcDexter/cython,fperez/cython,fabianrost84/cython,andreasvc/cython,ABcDexter/cython,roxyboy/cython,da-woods/cython,fabianrost84/cython,madjar/cython,hickford/cython,acrispin/cython,achernet/cython,cython/cython,acrispin/cython,mrGeen/cython,dahebolangkuan/cython,ChristopherHogan/cython,andreasvc/cython,slonik-az/cython,encukou/cython,encukou/cython,scoder/cython,hhsprings/cython,mrGeen/cython,acrispin/cython,madjar/cython,c-blake/cython,andreasvc/cython,cython/cython,encukou/cython,encukou/cython,slonik-az/cython,roxyboy/cython,fabianrost84/cython,madjar/cython,c-blake/cython,ChristopherHogan/cython,scoder/cython,achernet/cython,mcanthony/cython,hhsprings/cython,marscher/cython,andreasvc/cython,mrGeen/cython,fperez/cython,da-woods/cython,marscher/cython,andreasvc/cython,hickford/cython,ABcDexter/cython,mrGeen/cython,ABcDexter/cython,encukou/cython,mcanthony/cython,scoder/cython,achernet/cython,JelleZijlstra/cython,da-woods/cython,fperez/cython,mrGeen/cython,madjar/cython,scoder/cython,fabianrost84/cython,mcanthony/cython,ABcDexter/cython,roxyboy/cython,fperez/cython,acrispin/cython,hickford/cython,slonik-az/cython,JelleZijlstra/cython,c-blake/cython,c-blake/cython,hickford/cython,dahebolangkuan/cython,JelleZijlstra/cython,dahebolangkuan/cython,hickford/cython,fabianrost84/cython,marscher/cython,slonik-az/cython,cython/cython,achernet/cython,dahebolangkuan/cython,JelleZijlstra/cython,slonik-az/cython,c-blake/cython,roxyboy/cython,dahebolangkuan/cython,ChristopherHogan/cython,mcanthony/cython,achernet/cython,madjar/cython,roxyboy/cython,hhsprings/cython,fperez/cython,hhsprings/cython,marscher/cython,mcanthony/cython,JelleZijlstra/cython,da-woods/cython,marscher/cython,cython/cython,acrispin/cython