"Found hole"

htebalaka goodingm at gmail.com
Tue Jan 20 23:11:58 UTC 2015

Unless it behaves differently in GHC than GHCi, you can still use underscore
prefixed identifiers, provided they are in scope. I only get a type hole
message if the identifier isn't defined anywhere else.

>> let _x = 2
>> _x
>> _y
Found hole '_y' with type: t

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