Haskell/Haskell.g4, parseing error for an import statement

[zhuwq585]

When parsing an unpassed code segment from RosettaCode I got an error on a normal statement in the first line: line 1:18 no viable alternative at input 'import Data.List (group'

The others went well like a passed segment

I wonder why this simple import statement below can not pass the generated parser import Data.List (group)

My ANTLR version: v4.9.3