value lookup is not a member of this.Context

[nbauma109]

Versions

Scala version: 2.12.8 to 2.12.19

Reproduction steps

1. Clone scala ide project https://github.com/nbauma109/scala-ide/
2. Launch ./build-all.sh

Or check the logs online https://github.com/nbauma109/scala-ide/actions/runs/8775079034/job/24076989923#step:4:3439

Problem

Because of the removal of Context.lookup() method, the project does not compile:

[ERROR] [Error] C:/Users/nicol/git/scala-ide/org.scala-ide.sdt.core/src/org/scalaide/core/internal/compiler/ScalaPresentationCompiler.scala:86: value lookup is not a member of this.Context

The method is used here:

https://github.com/scala-ide/scala-ide/blob/master/org.scala-ide.sdt.core/src/org/scalaide/core/internal/compiler/ScalaPresentationCompiler.scala#L86

On this commit, a long text describes implementation details and concerns, but does not mention a proper replacement for the method Context.lookup(). This might not be API, and the original developers might have lacked attention to that, but I'd appreciate to know what to use instead.

https://github.com/scala/scala/commit/dd0b8c6d6f1a740042b7c3bf6fce3b627035c24c

[som-snytt]

It's easy to search

https://github.com/scala/scala/blob/2.13.x/src/compiler/scala/tools/nsc/typechecker/Contexts.scala#L1281

and using github "blame" feature it's easy to hop backward to

https://github.com/scala/scala/blame/2dc5841638f8a48bace0084ac25baaef50e865f9/src/compiler/scala/tools/nsc/typechecker/Contexts.scala#L704

Questions (not bugs) should be directed at the discord chat or forum.