[mercury-users] mode error

[Michael Day]

Thought I might share this mode error with the world, seeing as it's so
impressive.

What do 'shared' and 'fake' mean?

mode error: variable `V_34' has instantiatedness `bound((list:[]) ; 
list:'[|]'(bound(pdf:array($ground($typed_inst((list:list((pdf:object))), 
list:list_skel((pdf:object))), dead, shared, fake)) ; pdf:bool(ground) ; 
pdf:dict($ground($typed_inst((list:list((std_util:pair(string, 
(pdf:object))))), list:list_skel(std_util:pair(ground, (pdf:object)))), 
dead, shared, fake)) ; pdf:float(ground) ; 
pdf:indirect(bound(pdf:func(ground) ; 
pdf:object($ground($typed_inst((pdf:object), (pdf:object)), dead, shared, 
fake)) ; pdf:pred(ground) ; pdf:ref(ground))) ; pdf:int(ground) ; 
pdf:lazy_func(ground) ; pdf:lazy_pred(ground) ; pdf:name(ground) ; 
(pdf:null) ; 
pdf:stream($ground($typed_inst((list:list((std_util:pair(string, 
(pdf:object))))), list:list_skel(std_util:pair(ground, (pdf:object)))), 
dead, shared, fake), ground) ; pdf:string(ground)), 
list:list_skel(bound(pdf:array($ground($typed_inst((list:list((pdf:object))), 
list:list_skel((pdf:object))), dead, shared, fake)) ; pdf:bool(ground) ; 
pdf:dict($ground($typed_inst((list:list((std_util:pair(string, 
(pdf:object))))), list:list_skel(std_util:pair(ground, (pdf:object)))), 
dead, shared, fake)) ; pdf:float(ground) ; 
pdf:indirect(bound(pdf:func(ground) ; 
pdf:object($ground($typed_inst((pdf:object), (pdf:object)), dead, shared, 
fake)) ; pdf:pred(ground) ; pdf:ref(ground))) ; pdf:int(ground) ; 
pdf:lazy_func(ground) ; pdf:lazy_pred(ground) ; pdf:name(ground) ; 
(pdf:null) ; 
pdf:stream($ground($typed_inst((list:list((std_util:pair(string, 
(pdf:object))))), list:list_skel(std_util:pair(ground, (pdf:object)))), 
dead, shared, fake), ground) ; pdf:string(ground)))))'

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