Looking at the PHM impl, this looks like it's caused by (float 0.5) and
(double 0.5) hashing differently.
user=> (= (float 0.5) (double 0.5))
true
user=> (map hash [(float 0.5) (double 0.5)])
(1056964608 1071644672)
Nicola Mometto writes:
> Looks like it's a bug in PersistentHashMap:
> user=> (contains? (hash-map {:a (float 0.5)} 1) {:a (double 0.5)})
> false
> user=> (contains? (array-map {:a (float 0.5)} 1) {:a (double 0.5)})
> true
>
> Immo Heikkinen writes:
>
>> (= (float 0.5) (double 0.5))
>> => true
>> (= #{(float 0.5)} #{(double 0.5)})
>> => true
>> (= {:a (float 0.5)} {:a (double 0.5)})
>> => true
>> (= #{{:a (float 0.5)}} #{{:a (double 0.5)}})
>> => false
>>
>>
>> Tested with both 1.6.0 and 1.7.0-alpha5.
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