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t5589neg2.scala:7: error: constructor cannot be instantiated to expected type;
found : (T1, T2)
required: String
for (((((a, (b, (c, (d1, d2)))), es), fs), gs) <- x) yield (d :: es).mkString(", ") // not ok
^
t5589neg2.scala:7: error: not found: value d
for (((((a, (b, (c, (d1, d2)))), es), fs), gs) <- x) yield (d :: es).mkString(", ") // not ok
^
two errors found
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