IntelliJ Errors with Chisel 7.0.0-RC1 Despite Successful Compilation

[Emin017]

When using Chisel 7.0.0-RC1, IntelliJ displays error messages even though the code compiles successfully. These errors were not present in Chisel 6.7.0 or earlier versions.

Specific Errors:

1. No implicit arguments of type: SourceInfo" (e.g., after IO)
2. No given instance of type chisel3.experimental.SourceInfo was found for parameter sourceInfo of method IO in class BaseModule
3. Scala 2 macro cannot be used in Dotty. See https://docs.scala-lang.org/scala3/reference/dropped-features/macros.html. To turn this error into a warning, pass -Xignore-scala2-macros to the compiler

These errors appear wherever Module is used.

Workaround:

Adding the following line suppresses the error:

implicit val info: SourceInfo = UnlocatableSourceInfo  

However, it is unclear if this is the intended solution for Chisel 7.x.

Cause:

The issue was introduced by pull request #4768. It seems to be raised by the migration to scala3.

Previous Discussion:

This problem was initially reported by another user in the discussion at #4918, which provides additional context.

cc @jackkoenig

[Emin017]

After a recent update to IDEA and the scala plugin, the errors seem to have disappeared.

Are you still able to reproduce this bug? @kazutomo

My Version Information:

IntelliJ IDEA 2025.1.1.1 (Ultimate Edition)
Build #IU-251.25410.129, built on May 9, 2025
Source revision: b815cfdcaa594

Scala plugin version: 2025.1.789

[kammoh]

Are you using any special settings?
I tried the Scala plugin versions 2025.1.789 and 2025.1.790 (released today) on IntelliJ 2025.1.1.1 (Ultimate Edition), and I still get the same annoying No implicit arguments of type: SourceInfo errors everywhere in my code.
There is also IntelliJ's failure to resolve structural types, such as Bundle elements.
There are ~200 other errors in a completely correct code! Completely unusable!

[Emin017]

Are you using any special settings? I tried the Scala plugin versions 2025.1.789 and 2025.1.790 (released today) on IntelliJ 2025.1.1.1 (Ultimate Edition), and I still get the same annoying No implicit arguments of type: SourceInfo errors everywhere in my code. There is also IntelliJ's failure to resolve structural types, such as Bundle elements. There are ~200 other errors in a completely correct code! Completely unusable!

Have you tried Settings | Languages & Frameworks | Scala | Editor | Error highlighting (using the Built-in)? I've found that sometimes have problems when switching to the Built-in.

BTW: I regenerated the bsp with Mill 0.12.11 and Java 23.0.2.

[kammoh]

Oh yeah, it was set to Built-in. The errors are gone after setting it to "Compiler". I also had to generate the BSP manually. Thanks!