"testdata/listcompr01.reject.lc" (line 6, column 42):
unexpected ','
expecting projection, swizzling, "@", literal, "_", "'", identifier, "[", "(", "{", "let", symbols, backquoted ident, "~", expression, lambda, "::", "->", "=>", "where", "data", "class", "instance", type family, type instance, "type", typed ident, "infix", "infixl", "infixr", operator definition, lhs, pattern or end of input