Using scala-collection-compat together with silencer-plugin is broken

When the scala-collection-compat library is used together with the silencer-plugin compiler plugin, you get errors like this:

[error] /home/runner/work/izumi-reflect/izumi-reflect/izumi-reflect/izumi-reflect/src/main/scala/izumi/reflect/internal/fundamentals/collections/IzMappings.scala:26:4: expected literal string as @nowarn annotation argument
[error]   @nowarn("msg=deprecated")
[error]    ^

Workaround is to drop silencer-plugin, but that might not be the desired solution.

It’s worth to note that scala-collection-compat defines its own nowarn annotation: https://github.com/scala/scala-collection-compat/blob/master/compat/src/main/scala-2.11_2.12/scala/annotation/nowarn.scala

Related: https://github.com/zio/izumi-reflect/pull/121 https://github.com/scala/scala-collection-compat/issues/413#issuecomment-767967951 https://github.com/scala/scala-collection-compat/pull/417

/cc @SethTisue @ekrich

continuation of https://github.com/scala/scala-collection-compat/issues/418

[ghik]

@sideeffffect there should be 1.7.2 soon, see https://github.com/ghik/silencer/actions

[ghik]

@rdesgroppes Since you’re bound by Scala version used by sbt, I’m assuming you are developing an sbt plugin? I’m not familiar with sbt plugin development but in principle you should be able to force 2.12.13 to be used in your plugin. This should work because minor Scala versions are supposed to be both backwards and forward compatible.