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T3613.hs:14:20: error: [GHC-83865]
• Couldn't match type ‘IO’ with ‘Maybe’
Expected: Maybe ()
Actual: IO ()
• In the first argument of ‘(>>)’, namely ‘bar’
In the first argument of ‘fooThen’, namely ‘(bar >> undefined)’
In the expression: fooThen (bar >> undefined)
T3613.hs:17:24: error: [GHC-83865]
• Couldn't match type ‘IO’ with ‘Maybe’
Expected: Maybe ()
Actual: IO ()
• In a stmt of a 'do' block: bar
In the first argument of ‘fooThen’, namely
‘(do bar
undefined)’
In the expression:
fooThen
(do bar
undefined)
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