Hi I m curious about some strange behavior when compiling Sc

Question

Hi I m curious about some strange behavior when compiling Scala I ve noticed while updating from 1 30 4 to 2 15 According to <https docs scala lang org style files html> it seems it s common to put sealed traits and their case classes in the same file which compiles fine with 1 30 4 but in 2 15 it complains that there s a dependency cycle I can workaround this by explicitly excluding the target as a dependency from itself but that seems a bit awkward Is this intended behavior

refined-hydrogen-47967 · Answer

ex ```scala source name= test trait target source= TestTrait scala dependencies= test trait target ```

witty-crayon-22786 · Answer

what does the error look like cycles should be fine in general

witty-crayon-22786 · Answer

and sorry i need to log off but if you post the error and a bit more of the reproduction here or in a ticket i ll look at it tomorrow morning

refined-hydrogen-47967 · Answer

Thank you no hurry The error is as follows ``` ERROR 1 Exception encountered Engine traceback in `check` goal in Check compilation for Scala scalac in Resolve coarsened targets CycleException The dependency graph contained a cycle gt src scala com test trait target gt src scala com test trait target To fix this first verify if your code has an actual import cycle If it does you likely need to re architect your code to avoid the cycle If there is no cycle in your code then you may need to use more granular targets Split up the problematic targets into smaller targets with more granular `sources` fields so that you can adjust the `dependencies` fields to avoid introducing a cycle Alternatively use Python dependency inference ` python infer imports` rather than explicit `dependencies` Pants will infer dependencies on specific files rather than entire targets This extra precision means that you will only have cycles if your code actually does have cycles in it ``` As for the advice in the message I wouldn t expect this to constitute an import cycle I could probably split it up into 2 or 3 files if there were also a companion object but as it is there s only 1 file so I don t think it s possible to make any more granular targets And when I try to use the recommended flag I get an error for an unknown flag src scala com TestTrait scala ```package com sealed trait TestTrait case object TestTraitA extends TestTrait case object TestTraitB extends TestTrait case object TestTraitC extends TestTrait``` src scala com BUILD ```scala source name= test trait target source= TestTrait scala ```