Code using cyclic types dependency fails to compile when using protected val in trait constructor

[WojciechMazur]

Regression found in Open CB for 47degrees/github4s : build logs

Compiler version

3.3.1-RC1-bin-20230224-c1809bc-NIGHTLY

Last good release: 3.3.1-RC1-bin-20230218-7c9c72a-NIGHTLY
First bad release: 3.3.1-RC1-bin-20230220-e65f6a6-NIGHTLY

Bisect points to b509104 but this commit seems to introduce other regression (different errors), which probably has been fixed.

error while loading Typeable$package,
class file scala/reflect/Typeable$package.class is broken, reading aborted with class dotty.tools.tasty.UnpickleException
TASTy signature has wrong version.
 expected: {majorVersion: 28, minorVersion: 4 [unstable release: 1]}
 found   : {majorVersion: 28, minorVersion: 3 [unstable release: 1]}

This TASTy file was produced by an unstable release.
To read this TASTy file, your tooling must be at the same version.
The TASTy file was produced by Scala 3.3.0-RC2.
Note that your tooling is currently using an unstable TASTy version.
error while loading package$package,
class file scala/compiletime/package$package.class is broken, reading aborted with class dotty.tools.tasty.UnpickleException
TASTy signature has wrong version.
 expected: {majorVersion: 28, minorVersion: 4 [unstable release: 1]}
 found   : {majorVersion: 28, minorVersion: 3 [unstable release: 1]}

This TASTy file was produced by an unstable release.
To read this TASTy file, your tooling must be at the same version.
The TASTy file was produced by Scala 3.3.0-RC2.
Note that your tooling is currently using an unstable TASTy version.
-- Error: /workspace/dotty/bisect/activities.scala:3:25 ------------------------
3 |trait Activities extends github4s.utils.BaseIntegration{
  |                         ^
  |       package scala.compiletime does not have a member method erasedValue
error while loading $throws$package,
class file scala/runtime/$throws$package.class is broken, reading aborted with class dotty.tools.tasty.UnpickleException
TASTy signature has wrong version.
 expected: {majorVersion: 28, minorVersion: 4 [unstable release: 1]}
 found   : {majorVersion: 28, minorVersion: 3 [unstable release: 1]}

This TASTy file was produced by an unstable release.
To read this TASTy file, your tooling must be at the same version.
The TASTy file was produced by Scala 3.3.0-RC2.
Note that your tooling is currently using an unstable TASTy version.
error while loading Predef,
class file scala/runtime/stdLibPatches/Predef.class is broken, reading aborted with class dotty.tools.tasty.UnpickleException
TASTy signature has wrong version.
 expected: {majorVersion: 28, minorVersion: 4 [unstable release: 1]}
 found   : {majorVersion: 28, minorVersion: 3 [unstable release: 1]}

This TASTy file was produced by an unstable release.
To read this TASTy file, your tooling must be at the same version.
The TASTy file was produced by Scala 3.3.0-RC2.
Note that your tooling is currently using an unstable TASTy version.
-- Error: /workspace/dotty/bisect/activities.scala:4:9 -------------------------
4 |  println(this.ioRuntime)
  |         ^
  |        package scala.compiletime does not have a member method summonFrom
-- Error: /workspace/dotty/bisect/integration.scala:3:0 ------------------------
3 |trait Runtime
  |^
  |package scala.compiletime does not have a member method erasedValue
-- Error: /workspace/dotty/bisect/integration.scala:6:2 ------------------------
6 |  protected implicit val ioRuntime: Runtime = ???
  |  ^
  |  package scala.compiletime does not have a member method erasedValue
-- Error: /workspace/dotty/bisect/integration.scala:5:15 -----------------------
5 |abstract class BaseIntegration:
  |               ^
  |        package scala.compiletime does not have a member method summonFrom
-- Error: /workspace/dotty/bisect/integration.scala:8:26 -----------------------
8 |class Integration extends BaseIntegration, github4s.integration.Activities
  |                          ^
  |       package scala.compiletime does not have a member method erasedValue
10 errors found

The new compilation error was introduced later in 9a9834e

Overall bisect points to a range commits 7c9c72a..e65f6a6

Minimized code

// file1.scala
package  github4s.utils

trait Runtime

abstract class BaseIntegration:
  protected val ioRuntime: Runtime = ???

class Integration extends BaseIntegration, github4s.integration.Activities

// file2.scala
package github4s.integration

import github4s.utils.BaseIntegration

trait Activities extends BaseIntegration{
  println(this.ioRuntime)
}

It compiles when ioRuntime is either public or defined as def

Output

-- Error: /workspace/dotty/bisect/integration.scala:8:6 ------------------------
8 |class Integration extends BaseIntegration, github4s.integration.Activities
  |      ^
  |parent trait Activities has a super call which binds to the value github4s.utils.BaseIntegration.ioRuntime. Super calls can only target methods.
1 error found

Expectation

Probably should compile, but should be confirmed if 9a9834e works as expected. If so this issue can be used as a example of source compatibility breakage in 3.3.1 or 3.4.x