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I think this would help a lot. It would also help to check whether the code mentioned in an issue that triggers a crash is equivalent to the code you have.

Even if you can't publish your code, it might help to say "I'm seeing the same error, but I'm using X unlike the exmaple code that uses Y".

This will make sure that people who fix a bug will cover both causes with a test.

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I just bumped into SI-1503 [1] and SI-7714 [2]. Fortunately I was able to work around those and keep plugging away.

[1] https://issues.scala-lang.org/browse/SI-1503

[2] https://issues.scala-lang.org/browse/SI-7714

Thanks!

SI-1503 should warn in 2.12, additional progress might happen in https://github.com/scala/scala/pull/5310.

Here is a new one that I reported to scala-internals today: https://groups.google.com/forum/#!topic/scala-internals/w4HG...

Great, thanks!

I hit two bugs today. Both were produced during major global refactoring. I did not have time to catalogue the reproduction steps or anything, so I have no right to complain!

1. https://issues.scala-lang.org/browse/SI-9281

2. https://issues.scala-lang.org/browse/SI-8322

And another one today: https://issues.scala-lang.org/browse/SI-9222

Thanks! What the hell are you doing that you experience issues this often? :-)

I'm working on extending this ([1]) to contravariant functors while making the whole thing polytypic and typesafe (so I can abstract over type products and coproducts, among other things). My stuff will be open-sourced next year sometime at the latest. I think it's a combination of feature interactions and frequent refactoring during development that is a source for a lot of stuff that is not nice to the compiler.

edit: The extension to [1] is actually pretty benign and the compiler does well with it. The part that puts a big load on the compiler is that it is used as an interpreter for a popular, yet complicated, visualization DSL. The compiler, especially the typechecker, has to do a huge amount of work.

[1] https://github.com/jdegoes/scalaworld-2015/tree/master/src/m...

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